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Recommendation system by: Research project

PREPARATION OF UNIFORM METHODOLOGY FOR ESTABLISHING FERTILIZATION PLANS

A scientific report describing existing fertilization planning recommendations, comparing them to other countries' recommendation systems. Recommendation for a planning method for nutrient fertilization, including estimation of mineral nitrogen in soil. Also includes more open field plants, vegetables and orchards.

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Wheat
Maize
Potatoes
Nitrogen
Phosphorus
Potassium

Crops covered Wheat, Maize, Potatoes, Vegetables, Other cereals, Brassicas, Other crops
Nutrients covered Nitrogen (N), Phosphorus (P), Potassium (K)
Target soil pH Recommendations based on soil and cropping types Provided

Nitrogen
Crops for Nitrogen Recommendation Maize, Potatoes, Wheat
Nitrogen Analysis Options Total N, Mineral N
Soil Nitrogen Assess Method Lab Analysis
Factors for estimated Soil Mineral N
Soil Nitrogen content measurement Extraction with K2SO4
Phosphorus
Crops for Phosphorus Recommendation Maize, Potatoes, Wheat
Soil Phosphorus content measurement Lab based method
Phosphorus Sampling Frequency Every 3-4 years
Lab analysis method for Phosphorus Phosphorus and Potassium are determined by the Egner - Rim - Domingo (A-L) method. The soil is extracted in a solution of 1 M Lactic acid, 3 M Acetic acid, 1 M ammonium acetate, pH 3.7. Soil to solvent ratio 1:20, stirred for 4 hours.;Calcium chloride;
Potassium
Crops for Potassium Recommendation Maize, Potatoes, Wheat
Soil Potassium content measurement Lab based analysis
Lab analysis method for Potassium Phosphorus and Potassium are determined by the Egner - Rim - Domingo (A-L) method. The soil is extracted in a solution of 1 M Lactic acid, 3 M Acetic acid, 1 M ammonium acetate, pH 3.7. Soil to solvent ratio 1:20, stirred for 4 hours.;
Potassium Sampling Frequency Every 3-4 years
Potassium Measurement Method NIR
Soil available Potassium(Κ) from potash clays Both soil tests and soil type

Guidance for minimizing nitrate leaching Provided
Crops for which the recommended N rate is adapted depending upon nitrate leaching risk None

Nitrogen
Dry Springs Not Considered
Advice on irrigation for N recommendation Not Provided
Spring Crop N content Not Accounted for
Accepted methods for assessment of spring crop N content
Phosphorus
Spring Crop P content Not Accounted for
Accepted methods for assessment of spring crop P content
Nitrogen
Current in season crop N requirement Estimated
Basis for N Requirement Estimation Coefficients for evaluating the characteristics of cultivation, Nutrient (NPK) requirement for the cultivation of 1 t of production; Nutrients are left in the soil by pre-sowers and absorbed by plants; The amount of absorbed nutrients left by the types of organic fertilizers used for pre-sowing fertilization, Coefficients for evaluating the type of soil, Coefficients for evaluating the granulometric composition of the soil; Coefficients for evaluating the concentration of nutrients (NPK); Coefficients for evaluating humus concentration in soil; The coefficients of pH (KCl) in the soil were estimated; NPK content of nutrients in kg 1 t. natural moisture in various types of organic fertilizers; Limit values ​​of fertilized nutrients (NPK) according to environmental requirements;
Expected yields Estimated in season N requirement can be adjusted for expected yields
Basis of crop N requirements Current crop, Whole rotation
Phosphorus
Current in season crop P requirement Estimated
Basis for P requirement estimation Coefficients for evaluating the characteristics of cultivation, Nutrient (NPK) requirement for the cultivation of 1 t of production; Nutrients are left in the soil by pre-sowers and absorbed by plants; The amount of absorbed nutrients left by the types of organic fertilizers used for pre-sowing fertilization, Coefficients for evaluating the type of soil, Coefficients for evaluating the granulometric composition of the soil; Coefficients for evaluating the concentration of nutrients (NPK); Coefficients for evaluating humus concentration in soil; The coefficients of pH (KCl) in the soil were estimated; NPK content of nutrients in kg 1 t. natural moisture in various types of organic fertilizers; Limit values ​​of fertilized nutrients (NPK) according to environmental requirements;
Expected yields Estimated P requirement can be adjusted for expected yields
Basis of crop P requirements Crop approach, Rotation approach
Potassium
Current in season crop K requirement -
Basis for K requirement estimation
Expected yields Estimated K requirement can be adjusted for expected yields
Crops for which yield adjustments are made Wheat, Maize, Potatoes
Adjustments for Potato Recommendations
Recommendations on length of growing season, variety, haulm length and/or determinacy groups Available
Available adjustments for potatoes Earliness of potatoes variety;

Adjustments for nitrate leaching, gaseous N-losses and Ammonia Mitigation
N adjustments to account for gaseous N-losses are included for Not included
Fertiliser types and additives change recommendation
Ammonia mitigation strategies used for manufactured fertilisers
Manure application methods used for reducing ammonia emissions
Organic materials nutrient content
Crop available N for different types of organic material Calculated
Organic materials for which crop available N is calculated Farmyard manure (cattle, goat, pig, sheep, horse, duck), Cattle slurry, Pig slurry, Poultry manure, Digestate, Compost
Crop available nutrients from organic materials accounted for Nitrogen (N), Phosphorus (P), Potassium (K)
Nutrients for which there is an option to input own organic material nutrient analysis Nitrogen (N), Phosphorus (P), Potassium (K)
Types of organic materials for which regulation stipulates a sampling requirement All organic materials

Guidance on fertilizer application timings Not Provided
Guidance on the rate of fertiliser to apply at each timing Not Provided
Number of fertilizer N applications in wheat 3
Application number between maize and potatoes Does not differ
Number of fertiliser N applications in maize (or potatoes)
P & K application frequency in winter wheat Several times a year
P & K application frequency between maize and potatoes Does not differ
P & K application frequency in maize (or potatoes)
Crops with guidance available for the placement of fertilisers None
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