ARCHIVE: Fertiliser Manual (RB209)

Section 4: Arable and forage crops


For each crop, recommendations for nitrogen (N), phosphate (P2O5) and potash (K2O) are given in kilograms per hectare (kg/ha). Magnesium (MgO), sulphur (as SO3) and sodium (as Na2O) recommendations, also in kg/ha, are given where these nutrients are needed. Recommendations are given for the rate and timing of fertiliser application.

The recommendations are based on the nutrient requirements of the crop being grown, making allowance for the nutrients already contained in the soil. Section 3 gives instructions on how to use the tables, including how to determine the Soil Nitrogen Supply (SNS) Index.

More background on the principles underlying the recommendations is given in Section 1.

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