Calculators and estimators

Manure Capacity of Spreader

The owners manual for your spreader should provide information regarding its size and capacity. If this isn’t available, download this handy information sheet that will help estimate the manure capacity for various types of spreader such as V‑bottom, liquid tank, and box type.

Download the manure capacity information sheet.

Soil Nitrogen Supply (SNS) calculator

The Soil Nitrogen Supply (SNS) Index is an indicator of the soils capacity to supply N to a crop in the absence of applied fertilisers. The more N the soil can supply, the less fertiliser N needs to be applied. The calculatoris used to obtain the number required when using the AHDB Nutrient Management Guide (RB209), to get guidance on fertiliser application rates.

The Excel calculator created by the Agricultural Industries Confederation (AIC) can be found here.

The AIC is one of the founding partners of Tried & Tested and provides substantial support to our activities. The promotion of Tried & Tested

The calculator is also available on the Tried & Tested USB memory stick.

For more information on the USB memory stick, click here.

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