Increasing The Efficiency Of Fertilizers For Some Crops In Sharkia Soils

The Present work aimes to assess the comparative effects to fertilization response with the organic manure sources of chicken manure,famyard manure and compost as wellas chemical N and P fertilizers applied to potatoes on anewly reclaimed sandy soil. Three field experiments were conducted during 2002 / 2003 and 2003 / 2004 at Aladlia farm, in Belbais county, Sharkia Governorate, to study the effect of organic, bioorganic, and mineral fertilization on potato. I-Organic fertilizers - Three sources of organic manures were studied, compost (treated farm manure), chicken and cattle manures-These fertilizers were added at the rates of 90, 120 and 180Kg nitrogen/ feddan.II- Bio-organic fertilizers -Three sources of bio-organic fertilizers were used:-Bio-compost (compost with Bio fertilizers) & Bio-cattle manure, cattle manure+ bio fertilizers and Bio-poltery manure (chicken manure + Bio fertilizers).-These fertilizers were added by rates of 90 & 120 & 180Kg nitrogen/ feddan.III-Mineral fertilizers-Ammonium nitrate and ammonium sulphate fertilizers were added at rates of 120 kg N/fed. and 180 kg nitrogen/ feddan.-Phosphate fertilizers as ordinary and triple super phosphate which added at rates of 70, 100kg P2O5/ feddan applied as strips along furrows (M1) or as localized in bands (M2).