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Two field experiments were carried out at the Experimental Farm of Sakha Agricultural Research Station, Agricultural Research Center Egypt, during the two successive summer seasons of 2011 and 2012. The main objectives of this study were to determine the effect of tillage treatments, plant distribution patterns and sources of nitrogen fertilizer on growth, yield and its components of corn hybrid S.C. 128. Each tillage treatment was performed in separate experiment. Every experiment of tillage treatment was carried out in split plot design with four replications. The main plots were occupied with plant distribution patterns. The sub-plots were assigned to sources of nitrogen fertilizer. The most important results could be summarized as follaws: All studied characters were significantly affected by different studied tillage treatments in the two seasons. Using chisel plow twice gave the highest values of studied characters in both seasons. Using chisel plow once in addition to Stiller plow once was accompanied with the least values of these characters in both seasons. There was significant effect on all studied characters due to plant distribution patterns in the two seasons. Planting maize in ridges 80 cm apart, 22 cm between hills and one plant per hill produced the highest values of all studied characters in both seasons. Planting corn or maize in ridges 70 cm apart, 50 cm between hills and two plants per hill gave the lowest values of these characters in both seasons. Sources of nitrogen fertilizer had a significant effect on all studied characters in the two seasons. Using Urea fertilizer resulted in the highest means of all studied characters followed by using Ammonium Nitrate then Ammonium Sulphate fertilizers in both seasons. It can be concluded that tillage corn soil by using chisel plow twice and planting in ridges 80 cm apart, 22 cm between hills and one plant per hill in addition using Urea as a source of nitrogen fertilizer in order to maximize corn hybrid S.C.128 growth and its productivity under the environmental conditions of Sakha district,Kafr El-Shikh Governorate Egypt.

Two field experiments were conducted at private farms in El-Semblawin, Dakahlia Governorate during 2005 and 2006 seasons to investigate the effect of cultivars (Giza 111, Crawford, Giza 35 and Giza 21) and fertilization treatments (farmyard, chicken, urea, 75% farmyard + 25% urea and 75% chicken + 25% urea) on growth, yield and yield components as well as seed oil and protein contents. A spilt plot design with four replications was used. The obtained results can be summarized as follows: 1-Plants of Crawford were taller than the other cultivars (Giza 21, Giza 35 and Giza 111) in both seasons. While Giza 21 gave the highest number of branches, number of flowering groups and number of pods per plant, number of seeds/pod, number of seeds/plant, seed weight/plant, 100-seed weight, seed yield (ton fed) and oil and protein contents. While, Crowford gave the highest straw yield (ton/fed). However, Giza 111 gave the highest stem diameter as compared to the other cultivars. 2-Application of 75% chicken + 25% urea significantly increased all the studied characters of soybean cultivars in both seasons. 3-The interaction between Crawford and 75% chicken + 25% urea in both seasons had a significant effect on plant height and straw yields (ton/fed). 4-The interaction between Giza 21 and fertilization with 75% chicken + 25% urea gave the highest number of branches and oil content in the first season only. 5-The interaction between Giza 21 and fertilization with 75% chicken + 25% urea gave the highest values of number of flowering groups per plant, number of branches per plant, number of pods/plant, seeds weight/plant, 100-seed weight and seed yield (ton/fed) as well as oil and protein % of soybean seeds.

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