مادة الارض العضوية
تؤثر المادة العضوية تاثيرا كبيرا في العديد من الخواص الطبيعية والكيماوية للاراضي رغم المقادير البسيطة الموجودة منها وهي المسئولة عن حوالي نصف السعة التبادلية الكاتيونية للعديد من الاراضي ,والمادة العضوية هي المسئولة عن البناء الجيد بالطبقات السطحية للاراضي
Effect of Fertilizers (Activators) in Enhancing the Microbial Degradation of Endosulfan in Soil
IO.E.G. Elsaid, 2AO. Abdelbagi and 2EAE. Elsheikh
'Faculty of Agricultural Technology and Fish Sciences, Al-N eelain University, Khartoum, Sudan
2Faculty of Agricultural, University of Khartoum, Khartoum, Sudan
Abstract: The effect of fertilizers activators on microbial growth and capability in degrading IX and p-endosulfan was studied by incubating, two groups of microorganism in the presence and absence of four fertilizers (urea, triple super phosphate, urea + triple super phosphate and cow manure) for 45 days with sample drown every 15 days. Drawn sample were examined for microbial growth, concentration of starting material remained and a mount of sulphate generated. Results indicated that all activators caused significant increase in microbial counts especially the triple super phosphate followed by urea + triple super phosphate, cow manure and urea. Significant reduction in halflives of IX and p-endosulfan accompanied with various level of sulphate generation was noticed. Since, the microorganism studied have shown great potential in degrading endosulfan therefore any enhancement in their numbers and activity (caused by activator) will no doubt promote their capability in degrading endosulfan in soil.
Effect of different tillage treatments on infiltration characteristics of the
Salah Abdel Rahman Salih1 and Mohamed Abdel Mahmoud
Abstract: This study was conducted during 2009 and 2010 summer seasons at the Demonstration Farm of the Faculty of Agricultural Technology and Fish Science, University of Neelain (Jebal Awlia area) south of Khartoum to determine the effect of different tillage treatments on infiltration characteristics of the soil. Four tillage treatments namely, disc plough, disc plough followed by disc harrow, double ridging and chisel plough and zero tillage as a control. The variables compared were
the infiltration rate in the first five minutes of elapse time, the basic infiltration rate and accumulation infiltration.The results showed that all tillage treatments gave higher infiltration rate, accumulated infiltration and basic infiltration rate values than zero tillage (control). Chisel plow treatment gave a highly significant values (P +0.01) than the other four tillage treatments during the two seasons except that, no significant difference between chisel plow and disc plow during 2010 season.
Effects Of Biofertilization On Nodulation, Nitrogen And Phosphorus Content And Yield
Of Pigeon Pea (Cajanus Cajan)
1Awad Galal Osman, 2Ahmed Mohammed Elhassan Rugheim and 3Elkheir Mohammed Elsoni
Effects of Rhizobium and Bacillus Megatherium Var. Phosphaticum Strains and
Chemical Fertilizers on Symbiotic Properties and Yield of Faba Bean (Vicia Faba L.)
Ahmed Mohamed Elhasan 1 Rugheim and 2Migdam Elsheikh Abdelgani
1Faculty of Agriculture, Omdurman Islamic University, Omdurman, Sudan.
2Environment and Natural Resources Research Institute, the National Centre for Research, Khartoum.