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.
Access the recommendation system
Wheat
Maize
Potatoes
Nitrogen
Phosphorus
Potassium
| Publisher | Government |
| Name | Major & Micro nutrient advice for productive agricultural crops |
| Weblink | https://www.teagasc.ie/media/website/publications/2020/Major--Micro-Nutrient-Advice-for-Productive-Agricultural-Crops-2020.pdf |
| 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 |
| Nitrogen | |
| 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 |
| 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 | Morgan's method |
| Potassium | |
| 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 |
| Nitrogen | |
| 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 |
| 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 | Current crop, Whole rotation |
| 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 |
| Basis of crop K requirements | Crop approach, Rotation approach |
| 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 | None |
| Ammonia mitigation strategies used for manufactured fertilisers | None |
| 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 |
Funded by the European Union and UK Research and Innovation (UKRI). Views and opinions expressed are however those of the author(s) only and do not necessarily reflect those of the European Union, European Commission or UKRI. Neither the European Union, European Commission nor UKRI can be held responsible for them.
Project Coordinators
Sarah Kendall
sarah.kendall@adas.co.ukSpyros Fountas
sfountas@aua.grheurope.nutrichecknet@gmail.com
Project Partners
