in order to determine the role of plant leaf area in radiation distribution within the canopy and a better understanding of how crops and weeds intercept light a study of the complexity of plants is necessary. the  effect of intercropping on leaf area distribution and dry matter accumulation in corn, soybean and weeds canopy was studied in a  field experiment at a research field of tehran unive...

Field trial was conducted with the aim of utilizing extract allelopathic crop to reduce use synthetic herbicides in wheat fields. Sorghum at 12 L /ha, sunflower combination sorghum and extracts /ha chevalier 25, 50 100% recommended dose were applied alone or each other. Weed free weedy check treatments included for comparison. The experiment a randomized complete block design three replications...

search at Ithaca, NE, involving sudangrass, a cultivated form of S. bicolor subsp. drummondii, showed natural A critical impediment to field testing and deployment of transgenic outcrossing averaging 39 and 57% in each of two years sorghum [Sorghum bicolor (L.) Moench] is the threat of gene flow to weedy relatives through pollen. A technique using sorghum with (Pedersen et al., 1998). If simila...

Atrazine is a white, odorless powder (when pure) that is used as an herbicide to stop the growth of broadleaf and grassy weeds in crops such as corn, sugarcane, sorghum, pineapples, and macadamia nuts. It is not found naturally in the environment. It is moderately soluble in water, but is more soluble in organic solvents such as acetone, chloroform, and ethyl acetate. More than 37,000 tons of a...

Broomrape (Orobanche cernua L.) is an obligate root parasitic weed that significantly reduces the qualitative and yield attributes of tomatoes globally. The efficient management broomrape challenging because its complicated nature. Field trials were conducted to assess influence various irrigation scheduling control strategies on broomrape, presence, tomato productivity. experiment was with a r...

Sorghum, Sorghum bicolor (L.) Moench, seeds were planted in two different cropping systems, 'casado' (sorghum and maize in the same hill) and 'golpe alterno' (sorghum and maize in alternating hills) in one test; and in monocolture in a second test to determine 'he effects of number of sorghum seeds hill1and depth of planting, and seed size and colour, respectively, on seed survival and stand es...

The effects of eight summer rotation crops on nematode densities and yields of subsequent spring vegetable crops were determined in field studies conducted in north Florida from 1991 to 1993. The crop sequence was as follows: (i) rotation crops during summer 1991; (ii) cover crop of rye (Secale cereale) during winter 1991-92; (iii) 'Lemondrop L' squash (Cucurbita pepo) during spring 1992; (iv) ...