Abstract
Models of nutrient cycles (PKS) in grazed pastures are used to estimate fertiliser requirements for New Zealand farmers. Work relevant to the development of these models is reviewed. Fertiliser recommendations should be based on the long-term economic maintenance rate. Short-term modifications based on current soil nutrient status (PS) estimated by either soil tests or dynamic cycling models are probably not justified unless current fertiliser use differs greatly from the estimated maintenance rate. The effect of maintenance recommendations should be monitored, and if necessary modified, by soil testing and plant analysis.
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Cornforth, I.S., Sinclair, A.G. & Rowarth, J.S. The nutrition of grazed pastures in New Zealand. Plant Soil 155, 227–230 (1993). https://doi.org/10.1007/BF00025025
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DOI: https://doi.org/10.1007/BF00025025