Monthly variations of soluble P in a volcanic ash derived soil as affected by organic and mineral fertilizers

  title={Monthly variations of soluble P in a volcanic ash derived soil as affected by organic and mineral fertilizers},
  author={D. Felleca and Alfonso Ramunni and R. Scialdone},
  journal={Plant and Soil},
The effect of organic amendments (cow manure and green manure) on monthly variations of soluble P in a volcanic-ash-derived soil was studied. Soluble P (Truog's method) showed minimums at the beginning of August and at the beginning of January. Cow manure produced a remarkable increase of soluble P and removed the January minimum. In soils treated with legume green manure, soluble SP markedly decreased during the first and second month. Data for organic P suggested that the summer decreases of… CONTINUE READING

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