FERTILIZER RESPONSE OF CORN TO NITROGEN SOURCES AND INSECTICIDES IN CALCAREOUS SOILS AND THEIR RESIDUAL EFFECT ON FLAX | ||
| Egyptian Journal of Agricultural Research | ||
| Article 1, Volume 74, Issue 1, March 1996, Pages 1-13 PDF (3.12 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.1997.426649 | ||
| Authors | ||
| HANYAT.M. EL-NEMR; ABDELWAHED Y. NEGM; KHADRA A. ABBADY; IBRAHIM A. MOUSA | ||
| Soil and Water Research Institute, Agricultural Research Centre, Giza, Egypt. | ||
| Abstract | ||
| Different N sources, i.e. urea formaldehyd (UF), ammonium sul-phate (AS), ammonioum nitrate (AN) and urea (U) at the rate of 105 kg/N under two insecticides, i.e. aldicarb and diazinon were evalulated on corn in a pot experiment (25 Kg capacity) as well as their residual ef-fect on flax as a subsequent winter crop. Results showed that the dry weight of stem, leaves and ear leaf as well as straw yield/plant were insignificantly affected by either N source or insecticide, while, ear weight and grain yield/plant were signifi-cantly affected. The superiority of N sources for ear weight and grain yield/plant was in the order : UF >AS>AN>U. The interaction effects showed that using the insecticides under different N sources yielded more ear weight and grains than that of the control (without insecti-cides). N content of leaves, stems and grains were generally reduced by the insecticide application. Ear leaf analysis of N,P and K showed that AN was superior than the other N sources in association with diazinon which gave the highest values. Growth and yield of flax as a subsequent crop were insignificatnly affected by the residuals of the insecticides. Meanwhile, urea fertilizer was superior to other N sources with regard to the residual effect on flax yield. Application of the recommoded N rate (45 Kg N / fed.) gave higher values for flax growth and yield as well as N,P and K contents than those resulted from residual effect of either N or insecticides. | ||
| Keywords | ||
| Fertilizers; Insecticides; Flax; Soil; Crop yield | ||
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