00478nam a2200133Ia 4500008004100000082003300041100001900074245007000093260005700163300000900220490005900229600003700288650001900325140224s9999    xx            000 0 und d  a631.45:631.15' 16:658.155 L2  aRay, Howard E.  aSoil fertility evalution for increased farm production and profit  aNew DelhibThe fertilizer association of Indiac1972  a48p.  aFertilizer Association of India; proceedings, no.MKD/2  a Howard E.Ray and E.K.S.Nambiar.  aSoil,Fertility