JP2020149652A - Learning farming system for providing optimal irrigation and fertilizer for farming - Google Patents

Learning farming system for providing optimal irrigation and fertilizer for farming Download PDF

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JP2020149652A
JP2020149652A JP2019064803A JP2019064803A JP2020149652A JP 2020149652 A JP2020149652 A JP 2020149652A JP 2019064803 A JP2019064803 A JP 2019064803A JP 2019064803 A JP2019064803 A JP 2019064803A JP 2020149652 A JP2020149652 A JP 2020149652A
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洋一 金丸
Yoichi Kanamaru
洋一 金丸
隆広 五反田
Takahiro Gotanda
隆広 五反田
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Agri Smart Solutions Ltd
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Abstract

To provide a learning farming system capable of objective evaluation not only relying on the rules of thumb of a farmer in the cultivation of agricultural products.SOLUTION: In order to perform optimal irrigation and fertilization for changing the state of the field environment, the learning farming system combines and structures measured values of the field environment and empirical rules in a form of a proposition, and incorporates the same into a system in a form that can be handled by a computer. When there is no rule of thumb, a feedback system is built for learning the results of cultivation based on similar crops and similar environments.SELECTED DRAWING: Figure 1

Description

本発明は、営農を計算機が扱える数値で表現し、さらに営農者の経験則を構造化しそれを数値化し、これらと装置による測定等に基づいたデータとを合わせ計算手順等により施水や施肥の意思決定を行う営農のための学習型フィードバックシステム構築方法、システム及び製品に関する。 In the present invention, farming is expressed by numerical values that can be handled by a computer, and the empirical rules of farmers are structured and quantified, and these and data based on measurement by an apparatus are combined and water application or fertilization is performed by a calculation procedure or the like. Learning-type feedback system construction method, system and product for farming to make decisions.

ある農業圃場を見た場合、営農者が最大の利益を得られるように農作物の選定と育成を行うように、農業が営まれている。例えば、農作物の選定では、主に農作物の経済価値等を重視し、出荷時期の調整等を考慮して、品種選定を行う。一方で、農作物の育成には、圃場の環境が大きく影響している。例えば、太陽光等の日照時間、大気中の気温、湿度や二酸化炭素濃度、土中の温度、湿度や肥料濃度等がある。そのため、環境の状態によっては、育成が困難な栽培環境や農作物も存在する。 When looking at an agricultural field, agriculture is carried out so that the farmers select and grow their crops in order to maximize their profits. For example, in the selection of agricultural products, the economic value of the agricultural products is mainly emphasized, and the varieties are selected in consideration of the adjustment of the shipping time. On the other hand, the environment of the field has a great influence on the cultivation of agricultural products. For example, there are sunshine duration such as sunlight, air temperature, humidity and carbon dioxide concentration, soil temperature, humidity and fertilizer concentration. Therefore, depending on the environmental conditions, there are some cultivation environments and crops that are difficult to grow.

栽培環境の多くを制御することが出来るハウス栽培や植物工場では、その農作物に対する育成に効果的な環境を予め調べられれば、栽培環境を制御することで営農作業が軽減され容易になる。一方最も広く行われている露地における農作物の栽培は、自然のものを利用する前提とし、栽培環境として意図的に制御出来るのは、主に施水や施肥、除草、消毒による土中の湿度、肥料濃度、衛生状態の制御に留まる。 In house cultivation and plant factories that can control most of the cultivation environment, if the environment that is effective for growing the crop can be investigated in advance, controlling the cultivation environment will reduce and facilitate farming work. On the other hand, the most widely practiced cultivation of agricultural products in open fields is based on the premise that natural crops are used, and the cultivation environment that can be intentionally controlled is mainly water, fertilizer, weeding, and humidity in the soil due to disinfection. Only control fertilizer concentration and hygiene.

同じ農作物を育成する場合でも、圃場が変わるとその環境が大きく変わり、更に、土壌の特性や変動する天候への対応は営農者の経験則による判断によって行われており、農作物の客観的かつ標準的となる一般的な育成の指針がない状態である。あったとしても、特定の環境条件に基づいた手法である。 Even when growing the same crop, the environment changes drastically when the field changes, and the characteristics of the soil and the response to fluctuating weather are judged by the farmer's empirical rules, which is an objective and standard for the crop. There is no general guideline for training. If so, it is a method based on specific environmental conditions.

これらは、一定の成果をもたらしているが、最適の営農になっているかは、多くの場合、客観的な評価はなされていない。結果として現状の営農に関する改善も経験則に依存している。 Although these have produced some results, in many cases, there is no objective evaluation as to whether or not the farming is optimal. As a result, improvements in current farming also depend on rules of thumb.

経験則に基づく営農が、現在の営農環境で最適であった場合でも、客観的な解析が出来ないことで、経験則で得られる効果や意味の説明が出来ないことになる。そのため、客観的な説明に基づく、経験則の継承にも支障が現れる。 Even if farming based on empirical rules is optimal in the current farming environment, it is not possible to explain the effects and meanings obtained by empirical rules because objective analysis is not possible. Therefore, the inheritance of the rule of thumb based on the objective explanation is also hindered.

営農者にとっての価値観は、一律ではない。例えば、大量に作ることで、大きな利益を得ようと考える営農者もいるし、少量でも品質を高くすることで、大きな利益を得ようとする営農者もいる。しかしながら、多くのシステムでは、一つの価値観で最適化を図ろうとすることが多い。そのため、従来のシステムでは、営農者の多様な価値観を尊重出来ない。 Values for farmers are not uniform. For example, some farmers want to make a big profit by making a large amount, and some farmers want to make a big profit by improving the quality even in a small amount. However, in many systems, one value is often used for optimization. Therefore, the conventional system cannot respect the diverse values of farmers.

図1を用いて説明する。営農者の経験則が、測定項目、及び施水と施肥に関係し、「AならばBである」、「XとYとの関係はこのように表現出来る」と構造化することが出来る場合、命題として定義し、営農者による構造化経験則の入力情報3として入力情報とする。 This will be described with reference to FIG. When the farmer's rule of thumb is related to the measurement items and water application and fertilization, and can be structured as "A is B" and "the relationship between X and Y can be expressed in this way". , Defined as a proposition, and used as input information 3 of a structured empirical rule by a farmer.

営農者が栽培する作物に関する植物特性、品種情報、成長時間など農作物毎の公知の係数化された研究結果1と営農者の作物栽培経験則に基づく営農者が最適と考える定植時期、施水や施肥量の入力情報2および営農に必要な光熱費、人件費などの費用に関する構造化経験則の入力情報3を、システムによる入力情報の評価11を経て、システムへの入力情報とする。そうして、主に、営農者による経験則に基づく施水や施肥量の入力情報2から、日毎の計画を数値化した施水量や施肥量として、1年分、更に、時間毎に作成する。また、日毎の計画の1年分を計画表とする。次に、営農者による構造化経験則の入力情報3から、営農に関する作業日程、構造化された経験則情報を作成する。 Known coefficiented research results 1 for each crop such as plant characteristics, variety information, growth time, etc. regarding the crops cultivated by the farmer, and the planting time, watering, etc. that the farmer considers optimal based on the farmer's crop cultivation experience rules The input information 2 of the fertilizer application amount and the input information 3 of the structured empirical rule regarding the costs such as utility costs and labor costs required for farming are used as the input information to the system after the evaluation 11 of the input information by the system. Then, mainly from the input information 2 of the water application and fertilizer application amount based on the empirical rule by the farmer, the daily plan is quantified as the water application amount and fertilizer application amount for one year and further every hour. .. In addition, one year's worth of daily plans will be used as the planning table. Next, from the input information 3 of the structured rule of thumb by the farmer, the work schedule related to farming and the structured rule of thumb information are created.

これら作成された情報を管理された計画表付属情報5としてシステム上の構造化データベース(DB)に入力する。結果として、その農作物やその環境に対する計画表を用意出来る。これらを参考計画表とする。 These created information is input to the structured database (DB) on the system as the managed schedule attached information 5. As a result, a plan for the crop and its environment can be prepared. These are used as reference plan tables.

営農者の指定する農作物と環境を基に、参考計画表の基となった類似した農作物の類似した環境から、参考計画表を選び出す。そして、選び出した参考計画表を計画表として使用することで、経験則に基づいたDBへの入力が無い場合の既定値とする。 Based on the crops and environment specified by the farmer, the reference plan is selected from the similar environments of the similar crops that are the basis of the reference plan. Then, by using the selected reference plan table as the plan table, it is set as the default value when there is no input to the DB based on the empirical rule.

システムは、出来得る限りの環境の測定が行えるものとし、測定出来た項目は、栽培環境測定情報や生育実績の記録・評価情報8としてDBに保管する。 The system shall be able to measure the environment as much as possible, and the measured items are stored in the DB as cultivation environment measurement information and record / evaluation information 8 of growth results.

例えば、システムによる環境測定値例6のように、測定を行うことが出来る場合、環境測定情報のペンマン法への応用例13等を用いることが出来る。その場合、システムによる数値解析結果例7のように蒸散量の実測又は数値解析による推測が可能になる。なお、ペンマン法は、栽培環境測定情報から一般的気象情報だけを用いて植物の可能蒸発散量を計算しその量を推定する。 For example, when the measurement can be performed as in the environment measurement value example 6 by the system, the application example 13 of the environment measurement information to the Penman method can be used. In that case, the amount of transpiration can be actually measured or estimated by numerical analysis as in Example 7 of the numerical analysis result by the system. In the Penman method, the possible evapotranspiration of plants is calculated from the cultivation environment measurement information using only general meteorological information, and the amount is estimated.

DB上に管理された計画表と付属情報5に存在する情報とシステムによる数値解析結果例7を計画の測定値による補正12よって補正する。実際には、構造化された経験則と年間計画表に重点を置き、前日に消費された水分や肥料を基に、当日の計画に補正を加える。 The information existing in the plan table and the attached information 5 managed on the DB and the numerical analysis result example 7 by the system are corrected by the correction 12 based on the measured value of the plan. In practice, it focuses on structured heuristics and annual schedules, and makes corrections to the day's plan based on the water and fertilizer consumed the day before.

計画の測定値による補正12により、その結果として、システムが当日分の実行表を作成する。また、実行表は、潅水(施水)自動制御用の命令作成と実行21と施肥推奨の実行22から出来ている。そして、当日分の実行表に従って、施水と施肥は、システム側から自動で実施したり、人への指示を行ったりする。 As a result of the correction 12 based on the measured values of the plan, the system creates an execution table for the day. In addition, the execution table is composed of command creation and execution 21 for automatic control of irrigation (water application) and execution 22 for fertilization recommendation. Then, according to the execution table for the day, water application and fertilization are automatically performed from the system side or instructed to a person.

計画表は、当日の実行表が作成される前に、農産品として出荷あるいは販売する価格、作物取引相場指標、出荷金額などが営農者や外部システムによる計画表の補正情報4によって、補正されることがある。 Before the execution table of the day is created, the price, crop trading market index, shipping amount, etc. of the plan table to be shipped or sold as agricultural products are corrected by the correction information 4 of the plan table by the farmer or an external system. Sometimes.

当日の作業として、環境測定情報や実績の記録・評価情報8により、計画の補正内容と営農に対する実績を、システムに自動的に記録する。更に、後日営農に対する数値化された評価を加え、その結果もシステムに記録する。 As the work of the day, the correction contents of the plan and the results for farming are automatically recorded in the system by the environmental measurement information and the record / evaluation information 8 of the results. In addition, a quantified evaluation of farming will be added at a later date, and the results will be recorded in the system.

環境測定情報や実績の記録・評価情報8を関数の実体としての実績による解析や学習14を経て、DB上に管理された計画表と付属情報5に反映する。
例えば、年間計画に対する補正、実績や評価を数値解析や学習型の人工知能等を利用して、翌年の年間計画に反映させる。
The environmental measurement information and the record / evaluation information 8 of the actual results are reflected in the plan table and the attached information 5 managed on the DB through the analysis and learning 14 based on the actual results as the substance of the function.
For example, corrections to the annual plan, achievements and evaluations are reflected in the next year's annual plan by using numerical analysis and learning-type artificial intelligence.

農作物に対して、営農者が能動的に関与出来る営農作業であり、農作物の生育に必要かつ不可欠である潅水と施肥の最適な量と時期を、意思決定の重点として扱える。 It is a farming work in which farmers can be actively involved in crops, and the optimum amount and timing of irrigation and fertilization, which are necessary and indispensable for the growth of crops, can be treated as the focus of decision-making.

営農者の保有する圃場である農作物を育成している場合、その営農者は、ある一定の収益を得られる施水や施肥の手法を持っている。そこで、DB上に管理された計画表と付属情報5のように、営農者により日毎の計画を1年分入力することで、潅水(施水)自動制御用の命令作成と実行21で示す、営農の一部に対してシステムによる自動化が行える。 When growing crops that are fields owned by a farmer, the farmer has a method of watering or fertilizing that can generate a certain amount of profit. Therefore, as shown in the plan table managed on the DB and the attached information 5, by inputting the daily plan for one year by the farmer, the command creation and execution 21 for automatic control of irrigation (water application) is shown. System automation can be performed for part of farming.

営農のシステムによる自動化が行われることで、営農者の持つ経験則の全てあるいは一部が構造化されたことで、システムによって継承されたことになる。つまり、そのシステムを利用する限り、営農者が経験側を持った熟練の営農者である必要はなく、農作物の育成や経済的を評価する等の市場戦略に対し、初心者でも最適な営農が可能となる。 By automating the farming system, all or part of the farmer's rules of thumb have been structured and inherited by the system. In other words, as long as the system is used, the farmer does not have to be a skilled farmer with experience, and even beginners can perform optimal farming for market strategies such as growing crops and evaluating the economy. It becomes.

また、熟練の営農者によるシステムへの入力を期待出来ない状況の初心者であった場合、参考計画を使用することで、一定の成果を上げることが期待出来る。 In addition, if you are a beginner in a situation where you cannot expect input to the system by a skilled farmer, you can expect to achieve certain results by using the reference plan.

DB上に管理された計画表と付属情報5により、一旦数値化された計画表は、客観的な評価を行う関連要素して利用出来る。 The plan table once quantified by the plan table managed on the DB and the attached information 5 can be used as a related element for objective evaluation.

環境測定情報や実績の記録・評価情報8で示すように、実績に数値化した評価を与えることで、客観的な評価要素として利用出来る。 As shown in the environmental measurement information and the record / evaluation information 8 of the actual results, it can be used as an objective evaluation element by giving a numerical evaluation to the actual results.

実績による解析や学習14で示すように、数値化された関連要素と評価要素を使うことで、数値解析を含み学習型の人工知能等を使った解析が可能になる。その結果を利用することで、DB上に管理された計画表と付属情報5で示す、計画表の評価と改良に使用出来る。 Analysis by achievements and learning As shown in 14, by using numerical related elements and evaluation elements, analysis using learning-type artificial intelligence including numerical analysis becomes possible. By using the result, it can be used for evaluation and improvement of the plan table managed on the DB and the plan table shown in the attached information 5.

このことは、DB上に管理された計画表と付属情報5が、当初、熟練の営農者によるシステムへの入力という経験則に依存したものであったとしても、実績による解析や学習14で示す、客観的な手法を経ることで経験則の客観的な評価が行われることになる。経験則の客観的な評価と学習による見直しを繰返せることは、このシステムが学習によるフィードバックシステムになっていることを示している。また長期間システムを使用することで、学習効果の向上を期待出来る。 This is shown in analysis and learning 14 based on actual results, even if the schedule and attached information 5 managed on the DB initially depend on the empirical rule of input to the system by a skilled farmer. , An objective evaluation of the rule of thumb will be made by going through an objective method. The ability to repeat objective evaluations of empirical rules and review by learning shows that this system is a feedback system by learning. In addition, the learning effect can be expected to improve by using the system for a long period of time.

そして、経験則の客観的な評価が出来ることで、経験則の改良が行えることが期待出来る。 And it can be expected that the rule of thumb can be improved by being able to objectively evaluate the rule of thumb.

結果として、このフィードバックシステムを利用して、栽培する作物とその時点の営農環境の下での施水と施肥の最適な時期と量を知ることが出来る。 As a result, this feedback system can be used to know the optimal timing and amount of watering and fertilization under the crops to be cultivated and the farming environment at that time.

環境測定情報や実績の記録・評価情報8で示す、評価要素は、複数あっても構わない。実績による解析や学習14で示す、解析において、出荷時期、出荷量や農作物の品質等の評価要素を経済関連項目の一つとして指定することも出来る。例えば、出荷時期を早めることで、農作物の商品価値を上げるといったことである。 There may be a plurality of evaluation elements shown in the environmental measurement information and the record / evaluation information 8 of the results. Analysis based on actual results and learning In the analysis shown in 14, evaluation factors such as shipping time, shipping amount, and quality of agricultural products can be specified as one of the economic-related items. For example, by accelerating the shipping time, the commercial value of agricultural products can be increased.

更に、解析で複数の評価要素があった場合、一般にそれぞれの評価要素に優先度(重み)を付けて解析を行うことも出来る。例えば、「費用を先ず抑えて収量を最大にする」といった主旨に沿った解析を試みるなどである。 Further, when there are a plurality of evaluation elements in the analysis, it is generally possible to give priority (weight) to each evaluation element and perform the analysis. For example, try an analysis in line with the purpose of "suppressing costs first and maximizing yield".

評価項目に優先度を付ける手法と評価項目の選択の手法は複数存在する。そのため、営農者の価値観に沿った選択を行えることが期待出来る。 There are multiple methods for prioritizing evaluation items and selecting evaluation items. Therefore, it can be expected that the selection can be made according to the values of the farmer.

システムとしては、施水と施肥に限定して構築を目指しているが、ハウス栽培や植物工場のように制御出来る環境要素が増えた場合でも応用が可能である。つまり、施水と施肥に関して、学習されたDB上に管理された計画表と付属情報5を使用することで、例えば他の制御可能な環境要素を1つに限定することで、その環境要素が与える影響を学習することが期待出来る。無論、制御可能な環境要素を複数選んでもそれらの環境要素が与える影響を学習することが期待出来る。 The system aims to be constructed only for water application and fertilization, but it can be applied even when the number of controllable environmental elements increases, such as in house cultivation and plant factories. In other words, regarding water application and fertilization, by using the plan table and attached information 5 managed on the learned DB, for example, by limiting other controllable environmental elements to one, the environmental elements can be reduced. You can expect to learn the impact. Of course, even if you select multiple controllable environmental elements, you can expect to learn the effects of those environmental elements.

つまり、時間をかけて、DB上に管理された計画表と付属情報5の学習を進めることで、ハウス栽培や植物工場で必要とされる環境要素の値の解明が期待出来るということである。そして、その値に近づけるように制御可能な環境要素の制御を行うことにも期待出来る。 In other words, it can be expected that the values of environmental factors required for house cultivation and plant factories will be clarified by advancing the learning of the plan table and attached information 5 managed on the DB over time. Then, it can be expected to control the environmental elements that can be controlled so as to approach the value.

本手法によるシステムと外部情報の関連である。 This is the relationship between the system by this method and external information.

[図1]に示す内容は、計算機上に実装可能なシステムである。 The content shown in [Fig. 1] is a system that can be implemented on a computer.

1 農作物毎の公知の係数化された研究結果
2 営農者による経験則に基づく施水や施肥量の入力情報
3 営農者による構造化経験則の入力情報
4 営農者や外部システムによる計画表の補正情報
5 DB上に管理された計画表と付属情報
6 システムによる環境測定値例
7 システムによる数値解析結果例
8 環境測定情報や実績の記録・評価情報
11 システムによる入力情報の評価
12 計画の測定値による補正
13 環境測定情報のペンマン法への応用例
14 実績による解析や学習
21 潅水(施水)自動制御用の命令作成と実行
22 施肥推奨の実行
1 Known coefficientized research results for each crop 2 Input information of water application and fertilizer application amount based on empirical rules by farmers 3 Input information of structured empirical rules by farmers 4 Correction of planning table by farmers and external systems Information 5 Planning table and attached information managed on the DB 6 Example of environmental measurement value by the system 7 Example of numerical analysis result by the system 8 Environmental measurement information and record / evaluation information of actual results 11 Evaluation of input information by the system 12 Measurement value of the plan Correction by 13 Example of application of environmental measurement information to Penman method 14 Analysis and learning based on actual results 21 Creation and execution of commands for automatic control of irrigation (watering) 22 Execution of fertilization recommendation

Claims (10)

農業に於いて農作物の栽培や生育に係る事項、さらに経済的な生産量、販売量、販売価格も含めた営農経験則を、「AならばBである」、「XとYとの関係はこのように表現出来る」といった命題にすることで、計算機で扱える構造化された数値(データ)や数値の集合に置き換える方法 In agriculture, the rules of thumb for farming experience, including matters related to the cultivation and growth of agricultural products, as well as economical production, sales, and selling prices, are described as "A is B" and "The relationship between X and Y is. A method of replacing with a structured numerical value (data) or a set of numerical values that can be handled by a computer by making a proposition such as "can be expressed in this way" 請求項1に記載の方法であって、装置によって測定や評価可能な数値と、人間による測定や評価を表す情報とを、計算機で扱える数値の集合として統合した上で、計算機に入力として捉えられる数値化された評価要素の一部又は全部と、計算機が出力した数値化された評価結果の一部又は全部を使用して、要素から結果を導き出す関数を相関関係や関連等に基づいて求め、更に、求めた関数を利用することで、農作物の栽培と生育を繰り返しながら、最良の評価結果を導き出す要素を求め、結果によって原因となることを自動的に調整するフィードバックシステムを構築する方法 The method according to claim 1, in which numerical values that can be measured and evaluated by an apparatus and information representing human measurement and evaluation are integrated as a set of numerical values that can be handled by a computer, and then captured as input by the computer. Using part or all of the quantified evaluation elements and part or all of the quantified evaluation results output by the computer, a function that derives the results from the elements is obtained based on correlations and relationships. Furthermore, by using the obtained function, a method of finding the element that derives the best evaluation result while repeating the cultivation and growth of agricultural products, and constructing a feedback system that automatically adjusts the cause depending on the result. 請求項2に記載の方法であって、農作物に対して、営農者が能動的に関与出来る営農作業であり、農作物の生育に必要かつ不可欠である潅水と施肥の最適な量と時期を、意思決定の重点とする方法 The method according to claim 2, which is a farming work in which the farmer can actively participate in the crop, and the optimum amount and timing of irrigation and fertilization, which are necessary and indispensable for the growth of the crop, are intended. How to focus your decisions 請求項2に記載の方法であって、経験則を計算機が扱える構造で表現し、構造化された経験則を利用することで、農作物の育成や経済的な市場戦略に対し、人によらない経験則の継承を可能にする方法 The method according to claim 2, wherein the empirical rule is expressed by a structure that can be handled by a computer, and by using the structured empirical rule, it does not depend on people for the cultivation of agricultural products and economic market strategy. How to enable inheritance of rules of thumb 請求項2に記載の方法であって、装置による測定や測定結果と人間による測定や測定結果を統合したシステムを利用することで、装置による測定や測定結果又は、人間による測定や測定結果の何れかが欠落しても稼動可能なフィードバックシステムを構築する方法 By using the method according to claim 2, which integrates the measurement or measurement result by the device and the measurement or measurement result by a human, either the measurement or the measurement result by the device or the measurement or the measurement result by a human. How to build a feedback system that can operate even if it is missing 請求項2に記載の方法であって、長期間使用することで、その運用情報を、要素から結果を導き出す関数の精度向上に利用し、最良の評価結果を導き出す要素を求めていくフィードバックシステムを構築する方法 A feedback system according to claim 2, which uses the operational information for a long period of time to improve the accuracy of a function that derives a result from an element, and seeks an element that derives the best evaluation result. How to build 請求項2に記載の方法であって、数値解析手法として、ペンマン法等の標準的な手法と公知の農作物毎の係数化された測定結果を使用して、要素から結果を導き出す関数を求めフィードバックシステムを構築する方法 The method according to claim 2, which uses a standard method such as the Penman method and a known coefficientized measurement result for each crop as a numerical analysis method to obtain a function for deriving a result from an element and provide feedback. How to build a system 請求項2に記載の方法であって、数値解析や学習型の人工知能等による解析の手法を1つ以上使用して、要素から結果を導き出す関数を求めフィードバックシステムを構築する方法 The method according to claim 2, wherein a feedback system is constructed by obtaining a function for deriving a result from an element by using one or more methods of numerical analysis or analysis by learning type artificial intelligence. 請求項2に記載の方法であって、最良の評価結果を導き出す要素を求めていくフィードバックシステムを利用して、施水と施肥の最適な時期と量の意思決定をする方法 The method according to claim 2, wherein the optimum timing and amount of water application and fertilization are determined by using a feedback system that seeks elements for deriving the best evaluation result. 請求項2に記載の方法であって、構築されたフィードバックシステムを利用して、施水と施肥以外の評価要素の最適化条件を求める方法 The method according to claim 2, wherein the optimized conditions of evaluation factors other than water application and fertilization are obtained by using the constructed feedback system.
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