Effect of animal manure on phosphorus and potassium content of herbage
To diagnose phosphorus (P) and potassium (K) nutrition, the relations between the contents of nutrients in herbage (% P: % N, % K: %N) for two plots of different soil fertility were established. These relations were used to study the cumulative effect of animal manure. A rapid improvement of plant nutrition was shown for the initially deficient plot. This conclusion was checked by comparing nitrogen (N) content and herbage dry matter (DM) yield. The economic benefits of animal manure in disadvantaged areas are discussed.
Key wordsfertilization manure plant nutrition grassland mineral diagnosis
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