| phosphorus availability to rice (oriza sativa l.)-wheat (triticum estivum l.) in a vertisol after eight years of inorganic and organic fertilizer additions. | integrated use of inorganic fertilizer n and well decomposed cattle manure (cm) or 30-35 days old parthenium (parthenium hysterophorus l.), a weed grown off site as green manure (gm) under repeated applications of fertilizer p and urea n for eight years in a rice (oriza sativa l.)-wheat (triticum estivum l.) sequence was studied on transformation of fertilizer p applied to soil at the national research center for weed science, jabalpur, india. based on the results, it appeared that, repeated app ... | 2007 | 17067794 |