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

Twenty eight genotypes (seven parents and their 21 F1 crosses) were evaluated for days to heading, spike length, 1000-grain weight, number of grains/spike and grain yield/plant under three water regimes (35, 65 and 100 % from the field capacity of the soil) over two years. Variance analysis revealed that all studied traits were significantly affected by soil moisture content. Moreover, ... إقراء المزيد

A field experiment was conducted at Al-Kawthar experimental farm, Faculty of Agriculture, Sohag University, Egypt. to evaluate the possibilty of replacement mineral fertilizer with the local organic wastes such as farmyard manure (FYM) under two irrigation regimes. Wheat, Giza 168 cultivar (_Triticum_ 1 2 _aestivum _L) was chosen for this study.The treatments comprised: two irrigation regimes (I and I ) ... إقراء المزيد

THE PRESENT STUDY AIMS TO EVALUATE THE BACKGROUND LEVELS OF SOME HEAVY METALS (CD, CO, NI, PB AND CR) IN SUB-GROUPS OF SOHAG AGRICULTURAL SOILS. SEVENTY THREE SAMPLES WERE COLLECTED FROM 20 SOIL PROFILES REPRESENTING 20 LOCATIONS AND WERE ANALYZED FOR CD, CO, NI, PB AND CR. THE OBTAINED RESULTS SHOWED THAT THE AMOUNTS OF THE TOTAL METALS ARE GENERALLY ... إقراء المزيد

THE AIM OF THIS STUDY WAS TO INVESTIGATE THE EFFECTS OF SEWAGE SLUDGE APPLICATION AT 10 AND 20 M3 FED-1 ON MICROELEMENT CONTENTS OF A SANDY SOIL AND THEIR CONTENTS IN THE COTTON SEEDS GROWN ON THIS SOILS AND SO TO EVALUATE THE ENVIRONMENTAL RISKS OF SEWAGE SLUDGE APPLICATION ON HEAVY METAL ACCUMULATION IN SOIL AND PLANT. THE AIM OF ... إقراء المزيد