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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/10056

Title: Influence of Successive Application of Phosphorus and Potassium on The Yield of Corn and Soyabean Grown on Excessively Ferftilized Calcareous Soils
Authors: W.A.Al-Mustafa
A.E.Abdallah
A.S.Modaihsh
Z.T. Sliman
Issue Date: 1995
Abstract: The aim of this work was to study the effect of continuous application of P and K on soil test values and yield of corn (zea mays L.) and soybean (Glycine max L.) grown on a heavily fertilized calcareous soil. Two field experiments were conducted for six successive seasons on a sandy loam soil (mixed , calcareous, Typic Torrifluvents). Factorial combinations of four levels of 0 , 25 , 50 and 100 kg P ha-1 and 0 , 20 , 40 and 80 kg K ha-1 were applied annually to each crop. For both nutrients, the higher rate of application caused increase in soil testing values, and vice versa . Analysis of variance showed that 6 years means for corn and soybean yields not significantly affected by either P or K fertilization.Data obtained showed that annual application of 42 kg P ha-1 and 35 kg K ha-1 maintained the available initial soil P and K values in the soil used in this experiment Occasional positive yield response to fertilization were observed in individual years, but these responses often did not compensate fertilizer costs. The results at this site suggest that corn and soybean producers could increase their profits not by applying P or K fertilizers to high-testing soils
URI: http://hdl.handle.net/123456789/10056
Appears in Collections:College of Foods And Agricultural Science

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