00471nam a2200121Ia 4500008004100000082004300041245012000084260005700204300000900261490003300270600001900303650002700322130903s9999 xx 000 0 und d aTR631.811.2:63(540):311.17(047.3) L6 aPhosphorus in Indian Agriculture; an analysis of the use-pattern and means available for increasing its efficiency. aNew DelhibEuropean Nitrogen Service Programmec1976 a62p. aENSP Technical Bulletin No.1 aTandon, H.L.S. aPhosphorus Fertilizers