Effect of tillage and fertilization on soil biological and chemical characteristics and on {u200E}maize yield / Azza Ahmed Mohamed Mohamed ; Supervised Samy Mohamed Younis , Mohamed Mahmoud Ibrahim

Thesis (M.Sc.) - Cairo University - Faculty of Agriculture - Department of Agricultural Engineering

The agricultural sector contributed to the increase of the greenhouse gases (GHGs) concentrations into the atmosphere. Soil management and the use of high amounts of energy (direct and indirect) contribute significantly to these emissions. This work aims to study the soil organic matter and carbon transformation affected by four tillage practices (Minimum tillage performed via rotary plow, Minimum tillage performed via chisel plow seven blades, Minimum tillage performed via disk plow and no-tillage with using three types of fertilizer (urea, manure and compost). The study was carried out into two seasons during 2017 and 2018, at Faculty of Agriculture, Cairo University-Egypt. The experiment laid out in strip block design and three replicate.The results confirm that soil organic matter is not only a source of carbon but also a sink for carbon sequestration. Maximum total biomass production and grain yield were recorded in case of minimum tillage performed via rotary plow with manure fertilization. No tillage increased carbon content of soil, which led to reduce the emission of carbon dioxide. The Collected data revealed that, no tillage system recorded higher soil organic carbon over all the minimum tillage systems at 0-15 cm depth

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