Two field experiments were carried out at Sids Agricultural Research Station, Agricultural Research Center, Egypt during 2004 and 2005 summer seasons to study the effect of three possible integration between seedbed preparation by mechanical tillage i.e. mouldboard plow + rotary plow, chisel plow three passes + rotary plow, chisel plow two passes ( farmer treatment), intercropping sunflower with soybean, sole sunflower and weed control treatments (pendimethalin at 875 g/fed., fluazifop butyl at 62.5 g/fed., hand-hoeing twice and unweeded check) on fresh weight of weeds, yield and its components of primary crop (sunflower) and second crop soybean which intercropped with sunflower in natural infested soil by weeds.In both seasons, the main findings mentioned seedbed preparation by mouldboard plow + rotary plow and chisel plow + rotary; sunflower and soybean intercropping and weed control treatments (Pendimethalin hand-hoeing twice and fluazifop butyl) reduced weed biomass ranged from (17 -52), (34 -76) and (20 -96%), respectively. The previous three factors increased seed yield ranged from (2 -18), (6 -8) and (29 -63%), as well as, they gave the highest profitability ranged from (16 -56), (36 -60) and (25 -76%), respectively.Different possible interactions between the three studied factors referred that the use of two or three combination of them increased the potential of reducing weed biomass and increasing sunflower productivity and consequently increased the profitability as compared with any single. Thus tillage systems, intercropping and weed control treatments can be used as compatible tactics for weed management with improving sunflower production.

Two field experiments were carried out at El-Ismailia Agricultural Research Station, Agricultural Research Center during 2007 and 2008 successive summer seasons in a sandy soil under sprinkler irrigation system to study the effect of the integration between hand hoeing and some chemical weed control treatments on the dry weight (g/m 2 ) of annual weeds, growth characters, yield and its components, seed oil percentage of peanut ( Arachis hypogaea L.).Treatments were arranged in a split plots design with four replicates. The results revealed that one hand hoeing combined to all chemical weed control treatments decreased the dry weight of annual weeds (g/m 2 ) at 75 and 105 days after sowing in both seasons and increased all growth characters, yield components, pod yield (ardab/fed.) and straw yield (ton/fed.) of peanut as compared with chemical weed control treatments alone. Clethodim herbicide caused the highest reduction in dry weight of annual weeds i.e. 99.2 and 85% at 75 days after sowing in 2007 and 2008 seasons, respectively as compared with unweeded check.Applying clethodim or butralin had the superiority in depressing broad leaved weeds , while fluazifop-butyl came in the second rank. Concerning grassy weeds, bentazon or clethodim was superior in suppressing them . Adding hoeing once to herbicides revealed that bentazon and butralin gave a significant reduction in dry weight of grasses. Regarding total annual weeds, applying either clethodim or butralin was superior in their control, followed by fluazifop-butyl.The best yield of peanut was achieved using clethodim , followed by fluazifop-butyl and butralin. Whereas bentazon gave the lowest yield of peanut pods / fed . Seed oil content was not affected by the applied treatments in both seasons .The effect of hand hoeing x herbicides interaction was not significant on all studied characters in both seasons.