Individual and integrated effects of three weed control treatments H [weedy control (H1); Butralin (H2) and manual twice hoeing (H3)] , three hill spacing , D [10 (D1), 15 (D2) and 20 cm (D3)] and two soybean varieties, V [ Giza 111 (V1) and Giza 21 (V2)] on dry matter (DM) of associated weeds, growth traits and parameters, nutrients uptake and seed yield, were the intended aim of the present study. To achieve this aim, split- split plot arrangement was used, where tested variables; H, D and V were allocated in main-, sub- and sub-sub plot, respectively, at newly reclaimed soil of the experimental farm "Demo" of Fac. Agric., Fayoum Univ., during 2006 and 2007 summer seasons. The obtained results could be summarized as follows: Dry weight of weeds were deppressed by twice manual hoeing, dense planting, chemical control and the interaction of H2D2V2 in the first sample and H3 V1 in the second sample.Maximum values of soybean height, number of branches, LA and LAI were obtained by H2 or H3 depending on the sample as well as the studied variety. Soybean density had a significant effect on plant growth (height, DM and LA). In addition CGR and NAR as well as N, P, and K were affected by H3 and H2. Several dual and triointeractions significantly affected the growth traits. Manual hoeing, H3 (1490 kg/fed) out yielded Butralin treatment, H2 (1000kg/fed) and both surpassed the weedy control one, H1 (530 kg/fed). Closest spacing, D1 (1080 kg) followed by intermediate one, D2 (1060 kg) produced markedly by higher seed yield/fed that of the widest spacing (890 kg). V2 (1080kg) out yielded V1 (940 kg/fed). H3 D1 (1840), D2 V2 (1500) and H3D2 (1260) as well as H3D1V2 (1890 kg/fed) were the most effective interactions on soybean yield. The obtained results revealed that, in such newly reclaimed land, the maximum yield with improved quality of soybean could be obtained from Giza 21 planted in closed spacing (10cm) and treated with manual hoeing twice.

This study was carried out during two succes-sive seasons 2005 and 2006 on Anna apple trees budded on Balady apple rootstock, grown in sandy soil at (4 x 4m) apart under drip irrigation system, in a private farm at El-Khatatba, Monofia Gover-norate. A comparative study of some weed control treatments have been studied on Anna apple trees with its associated weeds. The tested weed control methods were using different colours of polyeth-ylene for mulching (green, blue, red, black and transparent), rice straw mulch, hand hoeing twice and two herbicides (Glyfosinate and Glyphosate) comparing with unweeded (control). All weed control treatments revented a significant reduction in fresh and dry weight of annual broad-leaved weeds, annual grasses, perennial and total weeds as compared with un weeded. The most effective treatments in decreasing fresh and dry weight of annual broad-leaves weeds were rice straw mulch-ing, followed by black polyethylene mulch and Glyfosinate. While, rice straw, black polyethylene and Glyphosate treatments were the most effective in decreasing fresh and dry weight of grass and total weeds. Also, the highest decrement in fresh and dry weight of perennial weeds were obtained by rice straw mulching and Glyphosate treatments. Moreover, results showed a remarkable improve-ment in growth, nutritional status of apple trees and yield (kg/tree). Also, physical and chemical properties of the fruits were improved. The most pronounced treatment developed under such study on the growth reduction of different grown weeds, meanwhile increased the apple tree growth, fruit yield associated with higher fruit quality was in rice straw mulching, black polyethylene mulching, Glyphosate treatments followed by hand hoeing twice treatment.Finally, it could be concluded that soil mulch-ing with rice straw can be used as a method for weed control in apple orchards. This method de-veloped such advantages over herbicides, polyeth-ylene mulch and hand hoeing in this concern. The possibility of using rice straw mulch for their many positive effects such as low coasts, in har-mony with ecosystem without no harmful residual effect especially for exported fruits and for pro-ducing safe fruits for human nutrition. In addi-tions, soil mulch with rice straw improving growth, leaves mineral contents as well as pro-duced higher yield and better quality of apple fruits.

A field experiment was conducted at the Experimental Farm at Faculty of Agriculture, Ain Shams University (loam soil); to study herbigation managements for maximizing green beans crop productivity under drip irrigation system. Two application techniques were used for weed control with pre-emergence Pendimethalin herbicide (Stomp 50% EC), the first application technique was injection herbicide through drip irrigation systems (surface and sub-surface) with three concentrations (100%, 75% and 50%) of herbicide recommendation dose (1.7 L/ fed) using venture device, secondly by conventional spraying using knapsack sprayer and control without treatment. The results showed that the best water application efficiency was (96%) and the highest value of water distribution uniformity was (95%) achieved with Sub surface-drip irrigation system. The best weeds control efficiency was (82%) achieved with injection herbicide through sub surface-drip irrigation system with 75% - (1.28 L/fed) - of the herbicide recommendation dose in compare with other treatments, which maximized the benefit from the applied herbicides and obtained high productivity and an export product with high quality. According to the obtained results herbigation with sub-surface irrigation system is an excellent method of controlling weeds for the growers with good management.