YIELD AND NUTRIENT CONTENT OF WHEAT AND CORN AS INFLUENCED BY SLOW AND QUICK RELEASE NITROGEN FERTILIZERS APPLICATION IN CALCAREOUS SOIL

Document Type : Original Article

Authors

Soil and Water Research Institute, Agricultural Research Centre, Giza, Egypt

Abstract

Two field experinents were carried out at Noubaria Research Sta­tion in the two successive years 1987 and 1988 . Urea formaldehyde (UF) , urea (U) and Ammonium nitrate (AN) fertilizers were evaluated as nitrogen sources for the production and quality of wheat (cv. Sakha 69). Urea formaldehyde and ammonium supiphate were also evaluted for corn (cv. H. 4141 ) on a calcareous soil . Great values of grain and straw yield of wheat were obtained in descending order when the plant re­ceived An, U and OF + AN at the rates 75,60 and 30+40 kg N If. The lowest yield was obtained from the treatment that received (60+30) Kg N/f. from UF + AN, respectively. Dry matter yield and N content of corn plant were greatly affect­ed each by using AS and UF treatment at the rate of 105 kg N/f. and UF (45 kg N/fed. ) in combination with 45 KgN/f. as As . However , UF treamtment at the rate of 105 kg N /f. which was separately applied or in combiantion with 45 kg/f. As increased dry matter and N contents of ear's leaf . The grain from UF was proportionally less than that in ordi­nary As treament ( 105 Kg N / f.) which produced the higest yield . However, grain yield of corn was better when the plants received OF at the rate of 52.5 + 52 . 5 from UF and AN, respectivelly.

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