CA1283302C - Complete stable suspension fertilizer compositions - Google Patents
Complete stable suspension fertilizer compositionsInfo
- Publication number
- CA1283302C CA1283302C CA000519769A CA519769A CA1283302C CA 1283302 C CA1283302 C CA 1283302C CA 000519769 A CA000519769 A CA 000519769A CA 519769 A CA519769 A CA 519769A CA 1283302 C CA1283302 C CA 1283302C
- Authority
- CA
- Canada
- Prior art keywords
- weight
- fertilizer composition
- iron
- suspension
- urea
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G5/00—Fertilisers characterised by their form
- C05G5/20—Liquid fertilisers
- C05G5/27—Dispersions, e.g. suspensions or emulsions
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Stable suspension fertilizer compositions include fast and slow release nitrogen compounds with at least one micro-nutrient and/or growth regulator. The compositions allow simultaneous application of various combinations of plant nutrients which had previously been either impossible or impractical. Such combinations are desirable to trigger specific metabolic responses in grass plants. The fertilizer composition includes methylene diurea, urea, mureated potash (potassium chloride), phosphoric acid and either a growth regulator or chelated iron.
Stable suspension fertilizer compositions include fast and slow release nitrogen compounds with at least one micro-nutrient and/or growth regulator. The compositions allow simultaneous application of various combinations of plant nutrients which had previously been either impossible or impractical. Such combinations are desirable to trigger specific metabolic responses in grass plants. The fertilizer composition includes methylene diurea, urea, mureated potash (potassium chloride), phosphoric acid and either a growth regulator or chelated iron.
Description
3~Z
COMPLETE STABLE SUSPENSION FERTILIZER COMPOSITIONS
The present invention relates to fluid mixed complete fertilizers and more particularly to complete stable suspension fertilizer compositions including slow and fast release nitrogen compounds with at least one micro-nutrient and/or growth regulator.
Fertilizers are mostly of the solid or liquid type and are designa~ed by a hyphenated series of numbers indicating plant food content in percentage by weight in the following order: N-~ 05-~ 0 in which N, P and R are the primary plant nutrient elements~ Early liquid turf fertilizers were solution type and contained not more than the three primary plant nutrient elements. Grass plants require relatively large amounts of nitrogen, and this is generally supplied in the ammoniacal or urea form, or in a combination of the two. Such nitrogen forms are highly soluble and, therefore, comparatively quick acting. They produce a surge of growth over a short period of time, such as a few days, and then are exhausted so that the grass plants have no further nitrogen available for continuous optimum growth. Nitrogen forms which are less soluble produce a sustained growth over a longer period of time, such as several weeks. A typical ~, P, K ratio in a turf fertilizer would be 4-1-2. Previously the application of a liquified nitrogen re~uired care because the already dissolved nitrogen would act very quickly and could produce a burning effect on the grass. To overcome this possibility it was normal to irrigate the grass after it had been fertilized. It has been found that this burning potential is drastically reduced by using slow release less soluble nitrogen forms such as methylene diurea (MDU) which is a water soluble condensation product resulting from the reaction of one molecule of formaldehyde with two molecules of urea, with the elimination of one molecule of water.
It has long been known that plants require more than just the primary plant nutrient elements and there are an additional ten recognized plant nutrients, constituting of three secondary nutrients and seven micro-nutrients. The understanding of the function of micro-nutrients has recently increased and their importance in growing and maintaining grass plants is more appreciated. In the past, these micro-nutrients were available in liquid form, but were not combined with solution fertilizers because of the possibility of causing precipi~ation in the solution. It has now been found that these micro-nutrients may be included in complete suspension fertilizer compositions.
Iron deficiencies in grass generally appear as yellowing of the leaves~ This condition is called iron chlorosis. Severe iron deficiencies result in complete chlorosis of leaves and eventual leaf loss. Leaves of iron deficient grass plants are pale green to yellow and may even appear white depending upon the degree of chlorosis.
Iron chlorosis is corrected mainly by foliar sprays. Soil applications of iron sources usually are not effectiqe because applied iron quickly reverts to forms unavailable to plants. Organic or chelated iron sources must be used to be effective as soil applications.
Previously nitrogen and iron could not be efficiently applied together. Foliar sprays of the quick acting nitrogen were considered dangerous because the grass blades were subject to burn if the nitrogen was left on the leaves and not washed off. However, if iron was added to the spray, then to be effective, the solution could not be washed off. It has been found that by combining synthetically chelated iron with a slowly available nitrogen, both in liquid form, a simultaneous application of the two nutrients may be made using a single product.
This product is safely effective whether or not it is ~L~8330~
washed off the grass blades. The combination of slow release liquid nitrogen with soluble iron provides for controlled and continuous growth and improves grass colour to a deep dark green which is considered desirable.
Liquid fertilizer compositions have advantages over granular formulations. Particle sizes and compositions are varied in granular formulations, and it is not possible to spreaa granular fertilizers as accurately or evenly as liquid fertilizers so the grass can take on a spotted or irregular pattern of light and dark green. Liquid fertilizers can be sprayed at low rates to feed the grass plants evenly.
The grass on golf greens is cut to a very low height and produces a dense growth to provide a "fast~ green ~or rolling golf balls. To maintain nfast" greens, they may be cut twice a day. When a granular fertilizer is spread on such low dense grass, the granules tend to sit on top of the grass and not penetrate down to the soil level. This is unsightly, and the exposed fertilizer granules may be damaged by the cleats in golfer's shoes are often actually removed from the green by the grass mower. Liquid fertilizers penetrate through the low dense grass immediately, thus overcoming the problem.
It is an aim of the present invention to provide a complete stable suspension liquid fertilizer which combines slow and fast release nitrogen with one or more secondary nutrients, micro-nutrients and/or growth requlators. The fertilizer composition can be fine tuned to specific areas of stress or to take into account specific deficiencies in grass plant nutrient sources. In one embodiment a slow release ni~rogen formulation is combined with chelated iron which allows slow and controlled nutrient release which minimizes growth over a long period, and due to the iron, maintains an attractive deep green colour. This embodiment is particularly suitable for producing fast golf greens with reduced frequency of mowing and a pleasing colour.
~ 330~
The present invention provides a complete stable suspension type liquid fertilizer which because it is in liquid form can be applied at very low rates on closely mowed turf without the necessity of sub~equent watering and without the probability of picking up fertilizer particles as would be the case with granular fertilizers.
Furthermore, the suspension type liquid fertilizers are an improvement over the solution type fertilizers as highly concentrated fertilizer solutions tend to crystallize and not remain evenly dispersed throughout the liquid.
Suspension fertilizers are prepared using a suspending agent which then allows a higher concentration of plant nutrient materials. In the past, suspension type fertilizers have been used in food crop fields~ but little use ha~ been made of these nutrient carriers in the area of grass fertilization and in particular, for the maintenance of fine turf.
The present invention provides a complete s~able suspension fertilizer composition consi~ting essentially of:
1 2 to 20~ by weight methylene diurea:
;~ 5 to 20% by weight urea;
5 to 25% by weight mureated potash (potassium chloride);
J 1 to 3~ by weight of a clay suspension agent 50 to 80% by weight water;
0 to 30% by weight phosphoric acid;
0 to lO~ by weight calcium:
O to lG% by weight magnesium;
0 to 10% by weight sulphur;
O to 54 by weight boron;
: 0 to 5% by weight chlorine;
0 to 5~ by weight copper:
0 to 5% by weight manganese;
C to 5% by weight molybdenum;
O to 5~ by weight zinc, and -, ~
~ ~3~3~
at least one component selected from the group consisting of 0,001 to 5.0~ by weight of a growth regulator and 1 to 10% by weight of iron with 2 to 30% by weight of a chelating agent.
In another embodiment, a complete stable suspension fertilizer composition consists essentially of:
COMPLETE STABLE SUSPENSION FERTILIZER COMPOSITIONS
The present invention relates to fluid mixed complete fertilizers and more particularly to complete stable suspension fertilizer compositions including slow and fast release nitrogen compounds with at least one micro-nutrient and/or growth regulator.
Fertilizers are mostly of the solid or liquid type and are designa~ed by a hyphenated series of numbers indicating plant food content in percentage by weight in the following order: N-~ 05-~ 0 in which N, P and R are the primary plant nutrient elements~ Early liquid turf fertilizers were solution type and contained not more than the three primary plant nutrient elements. Grass plants require relatively large amounts of nitrogen, and this is generally supplied in the ammoniacal or urea form, or in a combination of the two. Such nitrogen forms are highly soluble and, therefore, comparatively quick acting. They produce a surge of growth over a short period of time, such as a few days, and then are exhausted so that the grass plants have no further nitrogen available for continuous optimum growth. Nitrogen forms which are less soluble produce a sustained growth over a longer period of time, such as several weeks. A typical ~, P, K ratio in a turf fertilizer would be 4-1-2. Previously the application of a liquified nitrogen re~uired care because the already dissolved nitrogen would act very quickly and could produce a burning effect on the grass. To overcome this possibility it was normal to irrigate the grass after it had been fertilized. It has been found that this burning potential is drastically reduced by using slow release less soluble nitrogen forms such as methylene diurea (MDU) which is a water soluble condensation product resulting from the reaction of one molecule of formaldehyde with two molecules of urea, with the elimination of one molecule of water.
It has long been known that plants require more than just the primary plant nutrient elements and there are an additional ten recognized plant nutrients, constituting of three secondary nutrients and seven micro-nutrients. The understanding of the function of micro-nutrients has recently increased and their importance in growing and maintaining grass plants is more appreciated. In the past, these micro-nutrients were available in liquid form, but were not combined with solution fertilizers because of the possibility of causing precipi~ation in the solution. It has now been found that these micro-nutrients may be included in complete suspension fertilizer compositions.
Iron deficiencies in grass generally appear as yellowing of the leaves~ This condition is called iron chlorosis. Severe iron deficiencies result in complete chlorosis of leaves and eventual leaf loss. Leaves of iron deficient grass plants are pale green to yellow and may even appear white depending upon the degree of chlorosis.
Iron chlorosis is corrected mainly by foliar sprays. Soil applications of iron sources usually are not effectiqe because applied iron quickly reverts to forms unavailable to plants. Organic or chelated iron sources must be used to be effective as soil applications.
Previously nitrogen and iron could not be efficiently applied together. Foliar sprays of the quick acting nitrogen were considered dangerous because the grass blades were subject to burn if the nitrogen was left on the leaves and not washed off. However, if iron was added to the spray, then to be effective, the solution could not be washed off. It has been found that by combining synthetically chelated iron with a slowly available nitrogen, both in liquid form, a simultaneous application of the two nutrients may be made using a single product.
This product is safely effective whether or not it is ~L~8330~
washed off the grass blades. The combination of slow release liquid nitrogen with soluble iron provides for controlled and continuous growth and improves grass colour to a deep dark green which is considered desirable.
Liquid fertilizer compositions have advantages over granular formulations. Particle sizes and compositions are varied in granular formulations, and it is not possible to spreaa granular fertilizers as accurately or evenly as liquid fertilizers so the grass can take on a spotted or irregular pattern of light and dark green. Liquid fertilizers can be sprayed at low rates to feed the grass plants evenly.
The grass on golf greens is cut to a very low height and produces a dense growth to provide a "fast~ green ~or rolling golf balls. To maintain nfast" greens, they may be cut twice a day. When a granular fertilizer is spread on such low dense grass, the granules tend to sit on top of the grass and not penetrate down to the soil level. This is unsightly, and the exposed fertilizer granules may be damaged by the cleats in golfer's shoes are often actually removed from the green by the grass mower. Liquid fertilizers penetrate through the low dense grass immediately, thus overcoming the problem.
It is an aim of the present invention to provide a complete stable suspension liquid fertilizer which combines slow and fast release nitrogen with one or more secondary nutrients, micro-nutrients and/or growth requlators. The fertilizer composition can be fine tuned to specific areas of stress or to take into account specific deficiencies in grass plant nutrient sources. In one embodiment a slow release ni~rogen formulation is combined with chelated iron which allows slow and controlled nutrient release which minimizes growth over a long period, and due to the iron, maintains an attractive deep green colour. This embodiment is particularly suitable for producing fast golf greens with reduced frequency of mowing and a pleasing colour.
~ 330~
The present invention provides a complete stable suspension type liquid fertilizer which because it is in liquid form can be applied at very low rates on closely mowed turf without the necessity of sub~equent watering and without the probability of picking up fertilizer particles as would be the case with granular fertilizers.
Furthermore, the suspension type liquid fertilizers are an improvement over the solution type fertilizers as highly concentrated fertilizer solutions tend to crystallize and not remain evenly dispersed throughout the liquid.
Suspension fertilizers are prepared using a suspending agent which then allows a higher concentration of plant nutrient materials. In the past, suspension type fertilizers have been used in food crop fields~ but little use ha~ been made of these nutrient carriers in the area of grass fertilization and in particular, for the maintenance of fine turf.
The present invention provides a complete s~able suspension fertilizer composition consi~ting essentially of:
1 2 to 20~ by weight methylene diurea:
;~ 5 to 20% by weight urea;
5 to 25% by weight mureated potash (potassium chloride);
J 1 to 3~ by weight of a clay suspension agent 50 to 80% by weight water;
0 to 30% by weight phosphoric acid;
0 to lO~ by weight calcium:
O to lG% by weight magnesium;
0 to 10% by weight sulphur;
O to 54 by weight boron;
: 0 to 5% by weight chlorine;
0 to 5~ by weight copper:
0 to 5% by weight manganese;
C to 5% by weight molybdenum;
O to 5~ by weight zinc, and -, ~
~ ~3~3~
at least one component selected from the group consisting of 0,001 to 5.0~ by weight of a growth regulator and 1 to 10% by weight of iron with 2 to 30% by weight of a chelating agent.
In another embodiment, a complete stable suspension fertilizer composition consists essentially of:
2 to 20~ by weight methylene diurea;
5 tv 20% by weight urea;
5 to 25% by weight mureated potash (potassium chloride);
1 to 10% by weight iron;
: 2 to 30~ by weight of a chelating agent;
1 to 3% by weight of a clay suspension agent, and 50 to 80% by weight water.
A still further embodiment provides a complete stable suspension fertilizer composition consisting essentially o~:
2 to 20% by weight methylene diurea;
5 to 20% by weight urea;
10 to 30% by weight phosphoric acid 5 to 25% by weight mureated potash ~potassium chloride);
OoOOl to 5% by weight of a growth regulator;
1 to 3% by weight of a clay suspension agent, and 50 to 75~ by weight water.
The clay suspension agent is preferably attapulgite and the growth regulator is preferably indole butyric acid.
The essential ingredients of the stable fertilizer composition according to the present invention are slow and fast release nitrogen, n~mely methylene diurea and urea, potash and either a growth regulator for the grass roots or chelated iron. The composition is an aqueous solution and remains in stable suspension by the addition of a suspension agent. The mureated potash increases the ability o grass plants to resist disease. The solution also preferably contains one or more additives such as secondary nutrients, micro-nutrients other than iron, pesticides and fungicides.
:
.,L.,' ., ~83;~
A phosphorous source such as monammonium phosphate may be included. When a solution of monammonium phosphate is prepared, it may be mixed with potassium hydroxide to bring the pH level of the solution down to about 7 and produce potash.
- Two types of fertilizer according to the present invention are identified as 18-0-10 and 9-18-8~ The contents of these fertilizers are illustrated in the table.
Up to 10% by weight of any one or more of the three secondary nutrients, calcium, magnesium and sulphur may be added. Furthermore, up to 5% by weight of any one or more of the other six micro-nutrients, boron/ chlorine, copper, manganese, molybdenum and zinc, may be added, and up to lO~
by weight of iron, the seventh micro-nutrient can be included in the composition. When iron ~s added, it is chelated by the addition of a chelating agent.
The plant growth regulator used is preferably indole butyric acid, which is used to stimulate rooting activity in cuttings and on immature root systems at time of transplanting. It has been determined that this plant growth regulator also improves the root systems on mature plants while they remain in the growing medium~ A small quantity of the growth regulator in the range of 0.001~ up to 5~ by weight is added to the fertilizer composition. In the embodiment shown, 0.01% by weight was added. Turf fertilizers such as 9-18-8 are referred to as "starter"
fertilizers and are used to produce root growth in grass plants which are weak in that area. The addition of the plant growth regulator to the starter fertilizers improves the overall growth results of the fertilizer.
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5 tv 20% by weight urea;
5 to 25% by weight mureated potash (potassium chloride);
1 to 10% by weight iron;
: 2 to 30~ by weight of a chelating agent;
1 to 3% by weight of a clay suspension agent, and 50 to 80% by weight water.
A still further embodiment provides a complete stable suspension fertilizer composition consisting essentially o~:
2 to 20% by weight methylene diurea;
5 to 20% by weight urea;
10 to 30% by weight phosphoric acid 5 to 25% by weight mureated potash ~potassium chloride);
OoOOl to 5% by weight of a growth regulator;
1 to 3% by weight of a clay suspension agent, and 50 to 75~ by weight water.
The clay suspension agent is preferably attapulgite and the growth regulator is preferably indole butyric acid.
The essential ingredients of the stable fertilizer composition according to the present invention are slow and fast release nitrogen, n~mely methylene diurea and urea, potash and either a growth regulator for the grass roots or chelated iron. The composition is an aqueous solution and remains in stable suspension by the addition of a suspension agent. The mureated potash increases the ability o grass plants to resist disease. The solution also preferably contains one or more additives such as secondary nutrients, micro-nutrients other than iron, pesticides and fungicides.
:
.,L.,' ., ~83;~
A phosphorous source such as monammonium phosphate may be included. When a solution of monammonium phosphate is prepared, it may be mixed with potassium hydroxide to bring the pH level of the solution down to about 7 and produce potash.
- Two types of fertilizer according to the present invention are identified as 18-0-10 and 9-18-8~ The contents of these fertilizers are illustrated in the table.
Up to 10% by weight of any one or more of the three secondary nutrients, calcium, magnesium and sulphur may be added. Furthermore, up to 5% by weight of any one or more of the other six micro-nutrients, boron/ chlorine, copper, manganese, molybdenum and zinc, may be added, and up to lO~
by weight of iron, the seventh micro-nutrient can be included in the composition. When iron ~s added, it is chelated by the addition of a chelating agent.
The plant growth regulator used is preferably indole butyric acid, which is used to stimulate rooting activity in cuttings and on immature root systems at time of transplanting. It has been determined that this plant growth regulator also improves the root systems on mature plants while they remain in the growing medium~ A small quantity of the growth regulator in the range of 0.001~ up to 5~ by weight is added to the fertilizer composition. In the embodiment shown, 0.01% by weight was added. Turf fertilizers such as 9-18-8 are referred to as "starter"
fertilizers and are used to produce root growth in grass plants which are weak in that area. The addition of the plant growth regulator to the starter fertilizers improves the overall growth results of the fertilizer.
.: :
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The three primary nutrients, nitrogen, phosphorous, and potassium, can have varying amounts. Not less than 20%
of the total nitrogen is preferably the fast a~ting urea, and the methylene diurea may be varied from 2 to 20~ by weight of the total composition, urea varied from 5 to 20%
by weight, phosphoric acid from 0 to 30~ by weight, and mureated potash from 5 to 25% by weight.
In general, the manufacturing process entails the establishment of a phosphate and/or potash base suspension. This base consists of some combinations of monammonium phosphate, diammonium phosphate, potassium hydroxide and hydrous aluminum silicate. To this base is added liquid nitrogen.
Pesticides and fungicides up to 25% by weight can be added to the composition. The chelating agent which is added with iron is preferably orthophosphate-citrate acid and from 2 to 30% by weight may be added. Another suitable chelating agent is orthophosphoric-citric acid. Both chelating agents may be used together or separately. The clay suspension agent is preferably attapulgite. The number and amount of additives depends on ~he desired final composition.
EXAMPLE
The formula~ion of 1000 lbs of a fertilizer composition type 18-0-10 was produced by adding 45 lbs. of muriate of potash to 119 lbs of warm water (60 degrees C).
The potash dissolved and the resulting solution was continuously circulated through a centrifugal pump. To the solution was added 15 lbs. of hydrous magnesium aluminum silicate which formed a concentrated potash base suspension. After the suspension had cooled to about 50 degrees C, 450 lbs of a nitrogen solution containing by weight 2008% 193.6 lbs) of methylene diurea and 5.2% (~3.4 lbs) of urea was added. The mixture was continuously circulated through the centrifugal pumpr and heating was ~ ~33 ~'~
maintained to keep the mixture temperature at about 50 C.
147 lbs of urea prills~ containing by weight 46% (67.6 lbs~
of nitrogen was added to the mixture whilst heating and recirculating continued. The balance cf the mureate of potash (100 lbs) was added and dispersed throughout the mixture which was then allowed to cool to a temperature range of about 25 to 30 degrees C. 125 lbs of a solution containing by weight 8% (10 lbs) of iron which was fully chelated by the addition of 22.4% by weight (28 lbs) of orthophosphate-citrate, and mixed with the recirculating pump. The final suspension, composition contained 9% by weight nitrogen of the urea form, 9~ by weight nitrogen of the methylene diurea form, 0.625% by weight phosphorous of which 100% was chelated, 10% by weight of potash of which 10% was chelated, and 1% by weight of iron of which 100%
was chelated. The resulting composition was used as a complete stable suspension fertilizer for golf greens and the like.
The chelated iron in liquid form balances with the slow release nitrogen so that sufficient amounts of iron and nitrogen are provided to the turf throughout a growing season. Other additives may be added to the composition for a particular requirement such as a nutrient deficiency, fungus or other problem. The composition is put into containers ready for mixing with water before application.
Other changes may be made to the composition described herein without departing from the scope of the present invention which is limited only by the following claims.
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The three primary nutrients, nitrogen, phosphorous, and potassium, can have varying amounts. Not less than 20%
of the total nitrogen is preferably the fast a~ting urea, and the methylene diurea may be varied from 2 to 20~ by weight of the total composition, urea varied from 5 to 20%
by weight, phosphoric acid from 0 to 30~ by weight, and mureated potash from 5 to 25% by weight.
In general, the manufacturing process entails the establishment of a phosphate and/or potash base suspension. This base consists of some combinations of monammonium phosphate, diammonium phosphate, potassium hydroxide and hydrous aluminum silicate. To this base is added liquid nitrogen.
Pesticides and fungicides up to 25% by weight can be added to the composition. The chelating agent which is added with iron is preferably orthophosphate-citrate acid and from 2 to 30% by weight may be added. Another suitable chelating agent is orthophosphoric-citric acid. Both chelating agents may be used together or separately. The clay suspension agent is preferably attapulgite. The number and amount of additives depends on ~he desired final composition.
EXAMPLE
The formula~ion of 1000 lbs of a fertilizer composition type 18-0-10 was produced by adding 45 lbs. of muriate of potash to 119 lbs of warm water (60 degrees C).
The potash dissolved and the resulting solution was continuously circulated through a centrifugal pump. To the solution was added 15 lbs. of hydrous magnesium aluminum silicate which formed a concentrated potash base suspension. After the suspension had cooled to about 50 degrees C, 450 lbs of a nitrogen solution containing by weight 2008% 193.6 lbs) of methylene diurea and 5.2% (~3.4 lbs) of urea was added. The mixture was continuously circulated through the centrifugal pumpr and heating was ~ ~33 ~'~
maintained to keep the mixture temperature at about 50 C.
147 lbs of urea prills~ containing by weight 46% (67.6 lbs~
of nitrogen was added to the mixture whilst heating and recirculating continued. The balance cf the mureate of potash (100 lbs) was added and dispersed throughout the mixture which was then allowed to cool to a temperature range of about 25 to 30 degrees C. 125 lbs of a solution containing by weight 8% (10 lbs) of iron which was fully chelated by the addition of 22.4% by weight (28 lbs) of orthophosphate-citrate, and mixed with the recirculating pump. The final suspension, composition contained 9% by weight nitrogen of the urea form, 9~ by weight nitrogen of the methylene diurea form, 0.625% by weight phosphorous of which 100% was chelated, 10% by weight of potash of which 10% was chelated, and 1% by weight of iron of which 100%
was chelated. The resulting composition was used as a complete stable suspension fertilizer for golf greens and the like.
The chelated iron in liquid form balances with the slow release nitrogen so that sufficient amounts of iron and nitrogen are provided to the turf throughout a growing season. Other additives may be added to the composition for a particular requirement such as a nutrient deficiency, fungus or other problem. The composition is put into containers ready for mixing with water before application.
Other changes may be made to the composition described herein without departing from the scope of the present invention which is limited only by the following claims.
Claims (7)
1. A complete stable suspension fertilizer composition consisting essentially of:
2 to 20% by weight methylene diurea;
5 to 20% by weight urea 5 to 25% by weight potassium chloride;
1 to 3% by weight of a clay suspension agent;
50 to 80% by weight water;
0 to 30% by weight phosphoric acid;
0 to 10% by weight calcium;
0 to 10% by weight magnesium;
0 to 10% by weight sulphur;
0 to 5% by weight boron;
0 to 5% by weight chlorine 0 to 5% by weight copper 0 to 5% by weight manganese;
0 to 5% by weight molybdenum;
0 to 5% by weight zinc, and at least one component selected from the group consisting of 0.001 to 5.0% by weight of a growth regulator and 1 to 10% by weight of iron with 2 to 30% by weight of a chelating agent.
2. A complete stable suspension fertilizer composition consisting essentially of:
2 to 20% by weight methylene diurea;
5 to 20% by weight urea;
5 to 25% by weight potassium chloride;
1 to 10% by weight iron;
2 to 30% by weight of a chelating agent;
1 to 3% by weight of a clay suspension agent, and 50 to 80% by weight water.
5 to 20% by weight urea 5 to 25% by weight potassium chloride;
1 to 3% by weight of a clay suspension agent;
50 to 80% by weight water;
0 to 30% by weight phosphoric acid;
0 to 10% by weight calcium;
0 to 10% by weight magnesium;
0 to 10% by weight sulphur;
0 to 5% by weight boron;
0 to 5% by weight chlorine 0 to 5% by weight copper 0 to 5% by weight manganese;
0 to 5% by weight molybdenum;
0 to 5% by weight zinc, and at least one component selected from the group consisting of 0.001 to 5.0% by weight of a growth regulator and 1 to 10% by weight of iron with 2 to 30% by weight of a chelating agent.
2. A complete stable suspension fertilizer composition consisting essentially of:
2 to 20% by weight methylene diurea;
5 to 20% by weight urea;
5 to 25% by weight potassium chloride;
1 to 10% by weight iron;
2 to 30% by weight of a chelating agent;
1 to 3% by weight of a clay suspension agent, and 50 to 80% by weight water.
3. A complete stable suspension fertilizer composition consisting essentially of:
2 to 20% by weight methylene diurea;
5 to 20% by weight urea;
10 to 30% by weight phosphoric acid 5 to 25% by weight potassium chloride;
0.001 to 5% by weight of a growth regulator;
1 to 3% by weight of a clay suspension agent, and 50 to 75% by weight water.
2 to 20% by weight methylene diurea;
5 to 20% by weight urea;
10 to 30% by weight phosphoric acid 5 to 25% by weight potassium chloride;
0.001 to 5% by weight of a growth regulator;
1 to 3% by weight of a clay suspension agent, and 50 to 75% by weight water.
4. The fertilizer composition according to any of claims 1, 2 or 3 wherein the clay suspension agent is attapulgite.
5. The fertilizer composition according to claim 3 wherein the growth regulator is indole butyric acid.
6. A complete fertilizer composition comprising a stable suspension in an aqueous solution containing by weight about 9% methylene diurea, about 9% urea, about 10%
mureated potash, about 1% iron, about 3% of a chelating agent, and about 68% water, of attapulgite clay in an amount between about 1 to 3% by weight based on the suspension.
mureated potash, about 1% iron, about 3% of a chelating agent, and about 68% water, of attapulgite clay in an amount between about 1 to 3% by weight based on the suspension.
7. The fertilizer composition according to Claim 6 wherein the chelating agent is selected from the group consisting of orthophosphate-citrate acid and orthophosphoric-citric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000519769A CA1283302C (en) | 1986-10-03 | 1986-10-03 | Complete stable suspension fertilizer compositions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000519769A CA1283302C (en) | 1986-10-03 | 1986-10-03 | Complete stable suspension fertilizer compositions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1283302C true CA1283302C (en) | 1991-04-23 |
Family
ID=4134091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000519769A Expired - Lifetime CA1283302C (en) | 1986-10-03 | 1986-10-03 | Complete stable suspension fertilizer compositions |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1283302C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102875220A (en) * | 2012-09-11 | 2013-01-16 | 中国科学院沈阳应用生态研究所 | Special formula fertilizer for northern mowing grasslands and use method of special formula fertilizer |
-
1986
- 1986-10-03 CA CA000519769A patent/CA1283302C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102875220A (en) * | 2012-09-11 | 2013-01-16 | 中国科学院沈阳应用生态研究所 | Special formula fertilizer for northern mowing grasslands and use method of special formula fertilizer |
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