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Two field experiments were performed at Sids Agriculture Farm Research Station, Bani Swif Governorate during 2003 and 2004 seasons, to study the suitability of different tillage treatments, i.e. chisel plough two and three passes at 10, 15 and 20cm depths and intercropping patterns of maize and soybean i.e. two ridges of maize : two ridges of soybean (2:2) and two ridges of maize : four ridges of soybean (2:4) on water consumption, growth characters, yield and quality of maize (cv. T.W.C. 310) intercropped with soybean (cv. Clark). The results indicated that using chisel plough 3 passes decreased the value of mean weight diameter (M.W.D) by 33.00%, 27.92% and 31.87% as compared when using chisel plough 2 passes for 10, 15 and 20cm depths respectively. On other hand, yield and quality of maize, as well as, yield and quality of soybean were significantly increased by using tillage with chisel plough 3 passes. Both yield of maize and soybean per feddan. in pure stand were always higher than those within any intercrop combination, these results were true in both seasons. The data also revealed that maize yield in (2:2) pattern and using chisel plough 3 passes at 15cm depth gave the highest yield whereas, the highest yield of soybean per feddan was obtained when soybean plants grown in (2:4) pattern with 3 passes of chisel plough at15cm depth. On other hand the highest values of water use efficiency (W.U.E) in the two seasons were recorded when (2:4) pattern was applied and using chisel plough 3 passes at15cm depth The highest values of land equivalent ratio (LER) in the two seasons were 1.54 and 1.53 respectively when (2:4 ) pattern was applied.

EFFECT OF TILLAGE TREATMENTS AND INTERCROPPING PATTERNS ON WATER USE EFFICIENCY AND YEILD COMPONENTS OF SOYBEAN AND MAIZE