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The cation-anion balance in crops as a factor in determining the effect of nitrogen fertilizers on soil acidity


, : The cation-anion balance in crops as a factor in determining the effect of nitrogen fertilizers on soil acidity. Soil management in sustainable agriculture Proceedings of the Third International Conference on Sustainable Agriculture, Wye College, University of London, UK, 31 August to 4 September 1993: 293-299

The effect of cropping on soil acidity caused by the nitrification of N-fertilizer was determined by growing ryegrass in pots with the addition of NH4NO3 and different rates of CaCO3 and finding the amounts of lime required to bring the soil to its initial pH. Plants were analysed for total N, NO3-N and excess-base. Determinations of pH were made in 0.01 CaCl2 or H2O, with preliminary leaching to remove soluble soils.

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Related references

Pierre, W.H.; Meisinger, J.; Birchett, J.R., 1970: Cation-anion balance in crops as a factor in determining the effect of nitrogen fertilizers on soil acidity. In glasshouse experiments the acidity developed from ammonium nitrate in the soil was almost equal to that expected as the result of nitrification. When oats and buckwheat were grown in similar soil, acidity increased by 27 and 87%, respectively.

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