Following the successful launch of the ‘Online P and K calculator’ in 2013, the Fertilizer Association of Ireland has launched a Smart Phone App version of this simple and user-friendly P and K calculator for grassland and tillage crops.
The calculator is designed to calculate guideline P and K and fertilizer advice for a range of grassland, forage, and tillage crops from simple inputs that can be entered based on specific field information.
The App is freely available to download, and will provide a P and K recommendation for a grass or tillage crop in seconds.
The calculator takes account of a number of factors such as farm system, stocking rate, crop yields, soil test results and organic manure usage, to give simple bottom-line estimation of fertilizer P and K requirements.
It also includes useful field notes on soil test results and fertility levels, organic manures, lime, sulphur and magnesium.
• Click submit to see the breakdown of the P and K requirements for maintenance, soil buildup, P and K applied in organic manure, and chemical P and K required.
• Note that P fertiliser rates may need to be adjusted based on Nitrates limits on your farm.
• Repeat steps 2-5 to calculate and P and K requirement for a different crop or grassland scenario.