EFFECT OF PHOSPHOROUS AND ZINC APPLICATION ON THE AVAILABILITY OF PHOSPHORUS AND SOME MICRONUTRIENTS IN THE SOILS OF EGYPT | ||||
| Egyptian Journal of Agricultural Research | ||||
| Article 4, Volume 72, Issue 2, August 1994, Page 333-347 PDF (3.51 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejar.1994.449373 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| SAMER S. MEGALAH | ||||
| Soils and Water Research Institute, Agricultural Research Centre, Cairo, Egypt | ||||
| Abstract | ||||
| Laboratory incubation experiments were conducted using alluvial and calcareous soils to evaluate the effect of applying three levels of phosphorus (0, 50 and 100 ppm) and zinc (0, 5 and 10 ppm) in all possible combinations, on the changes of both the available phosphorus and the EDTA-extractable zinc, iron, copper and manganese content in soil. The results showed that applying phosphorus significantly decreased the content of EDTA-extractable Zn, Fe, Cu and Mn in soils. However, the rate of decrease declined with the length of the incubation period. The depressive effect of P on extractable Zn content was found to be more obvious with respect to soil native Zn than that of the applied one. Application of Zn also depressed the content of extractable Fe, Cu and P but significantly increased that of extractable Mn. | ||||
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