T WO FIELD experiments were carried out at Giza Agricultural Research Station (30° 02' N latitude and 31° 13' E longitude, altitude 22.50m above sea level), Egypt, during 2017 and 2018 seasons to investigate the effect of three intercropping patterns of cowpea (Vigna unguiculata L.) with teosinte (Zea mexicana Schrad) (1-On the other side of teosinte ridges, 1:1 and 2:2 in alternating ridges) and three seeding rates, (50%+50%, 75%+50% and 50% +75%) teosinte/cowpea of its pure stand on forage yield and its quality. A split plot design with three replicates was used. The results could be summarized as follows:-Intercropping pattern of 2:2 recorded the highest values for total fresh and dry forage yields whereas cowpea intercropped on the other side gave the lowest values in both seasons. Seeding rate of 75%+50% teosinte/cowpea recorded the highest values for total fresh and dry forage yields in both seasons. Intercropping pattern 2:2 with 75% teosinte+50% cowpea gave the highest value of totally fresh and dry yields. Whereas, planting cowpea on the other side with 50% seeding rates of both crops, gave the lowest values in both seasons.-Crude protein and digestible protein percentages, crude protein and digestible protein yields fed-1 were increased by different intercropping patterns. Seeding rates and the interaction between them compared with teosinte pure stand in both seasons, whereas fiber percentage behaved opposite trend in both season.-Land equivalent ratio (LER) and relative crowding coefficient recorded the highest values by the interaction between 2:2 ridges and 75% teosinte+50% cowpea seeding rates of its pure stands in both seasons. Teosinte was dominant crop in 6 out of 9 treatments in both seasons.-It could be concluded that 15kg teosinte+10kg cowpea and 2:2 intercropping pattern in alternate to obtain the highest mixture yield and quality.

Two field experiments were conducted at Sers EL-Lian Agricultural Research Station (EL-Minufiya Governorate) during 2005 / 2006 and 2006 / 2007seasons to study the effect of some preceding summer crops (cotton, soybean and maize) ,seeding rates (50, 60 and 70 kg seeds / fed)and three treatments mineral and bio-Fertilization (70 kg mineral N/fed, 70 kg mineral N/fed + Cerialein500g/fed and 70 kg mineral N/fed + Cerialein750g/fed) / fed on grain yield ,yield components and protein yield of wheat cultivar Sakha 94. Split-split plots design with three replication was used. The results indicated that yield, yield components and protein yield of wheat recorded the highest values when wheat was sown after soybean followed by cotton and recorded the lowest values when sown after maize. The results showed that plant height, number of spikes / m 2 , spike length (cm), number of grains / spike as well as 1000-grain weight (g), grain yield/fed and protein yield were significantly increased by increasing seed rates in both seasons, except grain weight /spike and straw yield /fed were not significantly in the first season and the number of spikelets/spike in both seasons. Increasing mineral and bio-N fertilizer levels up to 70 kg mineral N/fed+ two package of Cerialein / fed, significantly increased all characters, except number of spikelets /spike. The highest values of these characters were obtained with 70 kg mineral N/fed + 750g Cerialein / fed) .The application of 70 kg mineral N/fed resulted in the lowest values in both seasons. Results also, indicated that interaction between preceding crops and seeding rates significantly affected on spike length, protein yield /fed and grain yield/fed in both seasons, number of spikes / m 2 , weight of grains / spike and 1000-grain weight in second one. Also, the interaction between preceding crops and mineral or bio-N fertilization significantly affected on grain yield/fed and protein yield /fed in both seasons and 1000-grain weight in the second one only. Recommendation: The results of this investigation revealed that sowing wheat crop yield Sakh 94 c.v after soybean with 60 kg seeding rate/fed as well as 70 kg mineral N +750g Cerialein/fed produce the highest values of wheat grain yield.