GENAIDY, S., HEGAZY, M. (1994). EVALUATION OF MINERAL FERTILIZATION FOR MAIN FIELD CROPS: RELATIVE EFFICIENCIES AND ECONOMIC RATES. Egyptian Journal of Agricultural Research, 72(1), 1-12. doi: 10.21608/ejar.1994.443136
SAID A. GENAIDY; MOHAMED H. HEGAZY. "EVALUATION OF MINERAL FERTILIZATION FOR MAIN FIELD CROPS: RELATIVE EFFICIENCIES AND ECONOMIC RATES". Egyptian Journal of Agricultural Research, 72, 1, 1994, 1-12. doi: 10.21608/ejar.1994.443136
GENAIDY, S., HEGAZY, M. (1994). 'EVALUATION OF MINERAL FERTILIZATION FOR MAIN FIELD CROPS: RELATIVE EFFICIENCIES AND ECONOMIC RATES', Egyptian Journal of Agricultural Research, 72(1), pp. 1-12. doi: 10.21608/ejar.1994.443136
GENAIDY, S., HEGAZY, M. EVALUATION OF MINERAL FERTILIZATION FOR MAIN FIELD CROPS: RELATIVE EFFICIENCIES AND ECONOMIC RATES. Egyptian Journal of Agricultural Research, 1994; 72(1): 1-12. doi: 10.21608/ejar.1994.443136
EVALUATION OF MINERAL FERTILIZATION FOR MAIN FIELD CROPS: RELATIVE EFFICIENCIES AND ECONOMIC RATES
Soil and Water Research Institute, Agricultural Research Centre, Giza, Egypt
Abstract
Several field trials have been conducted on wheat, barley, sugar beet, faba bean, soybean, cotton, maize and rice for two successive seasons using different rates of N-, P-, K- and Zn-fertilizers. The yields of these crops were major aims which revealed the following conclusions: A. The economic yields, for winter crops, were obtained by adding the economic N-rates of 62.6, 68.9, 61.9 and 33.3 Kg N/fed. or by the economic P-rates of 31.3, 40.8, 30.9 and 46.3 Kg P205/fed. or by the economic K-rates of 46.1, 50.3, 71.1 and 44.9 Kg K20/fed. or by the economic Zn-rates of 2.81, 2.11, 4.52 and 3.76 Kg Zn/fed. for wheat, barley, sugar beet and faba bean, respectively. B. With respect to summer crops, the economic yields were obtained by the economic N-rates of 34.2, 59.6, 125.9 and 62.7 Kg N/fed. or by economic P-rates of 41.6, 53.1, 46.5 and 23.4 Kg P205/fed. or by economic K-rates of 30.2, 56.3, 58.6 and 25.5 Kg K20/fed. or by economic Zn-rates of 2.07, 2.63, 3.72 and 2.52 Kg Zn/fed. for soybean, cotton, maize and rice, respectively. C. Fertilizer-nutrient relative efficiencies (Fn'S) differed according to its type as well as field crop type and growth season.
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