الفهرس | Only 14 pages are availabe for public view |
Abstract Maize (Zea mays L.) is one of the most important cereal crops in Egypt and lhe world. Maize in the world ranks the third surpassed only by wheat and rice. It is a great importance for both human and animal feeding. Therefore, efforts are focused on increasing productivity of this crop by growing high yielding new hybrids under the most favourable cultural practices. The growth and yield of maize depend on many factors. from the major factors are genotypes, plant population density, and nitrogen fertilization. The optimum level of both factors varied widely according to soil fertility, water supply, clay length and planting patterns, Duncan (1972). Nitrogen fertilization is among the most important cultural practices, which control maize production (Mandour 1977 and Balko and Russel 1980). Provision for an adequate supply of nitrogen throughout the growing season is necessary and is one of the important functions of soil management |