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Recommendation system by: Government

Major & Micro nutrient advice for productive agricultural crops

Nutrient inputs (N,P,K,S) are based on target yields and soil test results for each crop. Nutrients in organic manures are accounted for using book values or lab values for nutrient concentrations. Total nutrient requirements are split by recommended application rates and timings for each crop over the season. Total nutrients and timings must be in adherence with environmental legislation.

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Publisher Government
Name Major & Micro nutrient advice for productive agricultural crops
Countries covered Ireland
Regions covered Whole country
Language English

Crops covered Wheat, Maize, Potatoes, Vegetables, Cover crops, Other cereals, Brassicas
Nutrients covered Nitrogen (N), Phosphorus (P), Potassium (K), Sulphur (S), Calcium (Ca), Magnesium (Mg), Boron (B), Copper (Cu), Iron (Fe), Manganese (Mn), Molybdenum (Mo), Sodium (Na), Zinc (Zn)
Target soil pH Recommendations based on soil and cropping types Provided

Crops for Nitrogen Recommendation -
Nitrogen Analysis Options Organic matter, Total N
Soil Nitrogen Assess Method Estimated
Factors for estimated Soil Mineral N Soil type, Past management
Soil Nitrogen content measurement Loss on ignition (LOI);Kjeldahl method;Extraction with KCl;
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 Morgan's method;
Crops for Potassium Recommendation Maize, Potatoes, Wheat
Soil Potassium content measurement Lab based analysis
Lab analysis method for Potassium Morgan's method
Potassium Sampling Frequency Every 3-4 years
Potassium Measurement Method Lab Analysis
Soil available Potassium(Κ) from potash clays Soil type

Guidance for minimizing nitrate leaching Provided
Crops for which the recommended N rate is adapted depending upon nitrate leaching risk Wheat, Maize, Potatoes

Dry Springs Not Considered
Advice on irrigation for N recommendation Not Provided
Spring Crop N content Accounted for
Accepted methods for assessment of spring crop N content Green area index;Shoot number;
Spring Crop P content Not Accounted for
Accepted methods for assessment of spring crop P content
Current in season crop N requirement Estimated
Basis for N Requirement Estimation Standard values for crop N content
Expected yields Estimated in season N requirement can be adjusted for expected yields
Basis of crop N requirements Current crop, Whole rotation
Current in season crop P requirement Estimated
Basis for P requirement estimation Standard values for crop P content
Expected yields Estimated P requirement can be adjusted for expected yields
Basis of crop P requirements Crop approach, Rotation approach
Current in season crop K requirement Estimated
Basis for K requirement estimation Standard yield
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 "Planting Date (N rates are increased based on lengths of growing season and early seed potato crops compared to main crop)"

Adjustments for nitrate leaching, gaseous N-losses and Ammonia Mitigation
N adjustments to account for gaseous N-losses are included for Manures
Fertiliser types and additives change recommendation
Ammonia mitigation strategies used for manufactured fertilisers
Manure application methods used for reducing ammonia emissions Precision application equipment (e.g. bandspreading), Incorporation into soil
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
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 Certain types

Guidance on fertilizer application timings Provided, Adjusted for the total amount of nutrient applied
Guidance on the rate of fertiliser to apply at each timing Provided
Number of fertilizer N applications in wheat 3
Application number between maize and potatoes Different
Number of fertiliser N applications in maize (or potatoes) Maize 1x, Potatoes 2x
P & K application frequency in winter wheat Once a year
P & K application frequency between maize and potatoes Different
P & K application frequency in maize (or potatoes) Two splits of P on low soil fertility fields
Crops with guidance available for the placement of fertilisers Wheat, Maize, Potatoes