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Recommendation system by: Government

SRUC Technical Notes

Provides detailed advice to land managers on a wide range of issues and are informed by research and practice in the field providing information and resources aimed at increasing the profitability and sustainability of farms and crofts. The Scottish system guides the grower through a series of stages, and assigns to each intended crop an N recommendation, based on the crop type, the N residues left by the previous crop or grass/clover type, as well as on the soil type and recent rainfall. 

Access the recommendation system

Wheat
Maize
Potatoes
Nitrogen
Phosphorus
Potassium

Publisher Government
Name SRUC Technical Notes
Weblink https://www.sruc.ac.uk/business-services/sac-consulting/agricultural-production/technical-notes/
Countries covered United Kingdom
Regions covered Scotland
Language English

Crops covered Wheat, Potatoes, Other cereals, Brassicas, Other crops
Nutrients covered Nitrogen (N), Phosphorus (P), Potassium (K), Sulphur (S), Magnesium (Mg), Copper (Cu)
Target soil pH Recommendations based on soil and cropping types Provided

Nitrogen
Crops for Nitrogen Recommendation -
Nitrogen Analysis Options None
Soil Nitrogen Assess Method Estimated
Factors for estimated Soil Mineral N Soil type, Rainfall, Past management
Soil Nitrogen content measurement None
Phosphorus
Crops for Phosphorus Recommendation Potatoes, Wheat
Soil Phosphorus content measurement Lab based method
Phosphorus Sampling Frequency 5 years +
Lab analysis method for Phosphorus Modified Morgan's method;
Potassium
Crops for Potassium Recommendation Potatoes, Wheat
Soil Potassium content measurement Lab based analysis
Lab analysis method for Potassium Modified Morgan's method;
Potassium Sampling Frequency 5 years +
Potassium Measurement Method None
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

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 Standard values for crop N content
Expected yields Estimated in season N requirement can be adjusted for expected yields
Basis of crop N requirements Crop approach
Phosphorus
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
Potassium
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
Adjustments for Potato Recommendations
Recommendations on length of growing season, variety, haulm length and/or determinacy groups Available
Available adjustments for potatoes Recommendations are not adjusted;

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, Compost, Biosolids, Waste derived materials e.g. paper crumble, food waste
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 None
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 2
Application number between maize and potatoes Different
Number of fertiliser N applications in maize (or potatoes) Maize is not covered by the recommendation system.
P & K application frequency in winter wheat Once 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 Potatoes
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