The objective of this study was to examine the influence of various zeolite levels on NH3 volatilization from urea fertilizer applied to sandy and calcareous soils. A laboratory incubation experiment in a closed dynamic air flow system was conducted in a completely randomized design with three replications. Four zeolite (clinoptilolite) levels of 0, 12.5, 25 and 50 g kg-1 soil ... إقراء المزيد

A laboratory incubation experiment was carried out to study the effect of bentonite application on ammonia volatilization from applied urea fertilizer to sandy and calcareous soils using a closed dynamic air flow system. Four bentonite levels of 0, 1.25, 2.5 and 5% and two urea levels of 250 and 500 kg urea fed-1 wt/wt. All treatments were arranged in a ... إقراء المزيد

In Egypt, there is a growing need for information relating to soil condition, its current status, and the nature and direction of change in response to management pressures. This information are required by land managers, and regional, state and national agencies to inform modified management and land-use practices and investment to maintain and improve the soil resource. The aim of ... إقراء المزيد

Land application is the only currently available technique for sewage wastewater disposal along the Nile Valley in Upper Egypt. Wastewater disposal projects have been established in the lowland desert zone extending between the cultivated floodplain and the Eocene Limestone plateau. The plan is to use the treated wastewater in irrigating woody farmlands. Some wastewater disposal sites are already operating, and ... إقراء المزيد

Current research has been focused on the influence of land use on Fe and Mn status in Sohag governorate soils, South Egypt. Soils were sampled from sites including the cultivated floodplain, reclaimed lands, Wadi deposits and the wastewater farmlands at El-Dair, and El-Kola. For these samples total and DTPA-extractable Fe and Mn were determined. Total Fe ranges 3.7-9.3%, 1.3- 12.3%, ... إقراء المزيد