a field experiment was conducted in research farm of isfahan university of technology, isfahan, iran in 2011 . various weeding periods were investigated on growth and yield of potato under drip tape and furrow irrigation systems. a split plot arrangement was used in a randomized complete block design with three replications. irrigation treatments were included in main plots and periods of weed ...

Management systems influence soil quality over time. A study was carried out on Vanmeter farm of the Ohio State University South Centers at Piketon Ohio, USA to evaluate the impact of crop rotations on soil quality from 2002 to 2007. The crop rotations comprised of continuous corn (CC), corn-soybean (CS) and corn–soybean-wheat-cowpea (CSW). Ten soil cores were collected at 0-7.5, 7.5-15, 15-22....

No-till cropping is an option for growers needing to reduce soil erosion in the Palouse annual-cropped region of the Pacific Northwest, which is well suited for wheat production. A 6-yr field study was conducted to determine optimum levels of fertilizer and herbicide inputs in a no-till continuous wheat crop production system. Three levels of nitrogen (N) and two weed management levels (WML) we...

Worldwide, herbicides remain the most efficient technology for large-scale weed control. Therefore, the widespread evolution of herbicide resistance in weed populations within intensive crop production systems is a major threat to the sustainability and profitability of cropping systems. The introduction of new herbicides and herbicide modes of action to replace those herbicides failing due to ...

Field trials were conducted in savannah woodland (Njala) and rainforest (Serabu) agroclimatic regions of Sierra Leone during 2016 second cropping season to assess different preemergence herbicides techniques that is efficient, cost effective environmentally safe cowpea production. The experiment consisted 20 treatments which included 2 genotypes (slipea 4 slipea 5) 10 weed control viz: butachlo...

The need to increase cowpea production solve the menace of malnutrition is a global challenge and land limitations have also made intercropping indispensable. Field trials were carried out at Teaching Research Farm, Kwara State University, Malete, National Centre for Agricultural Mechanization (NCAM) Idofian evaluate growth yield cultivars sorghum with their competitive behavior in cowpea-sorgh...

in order to determine the responses of morphological characteristics, yield and yield components of rapeseed (brassica napus l.) to plant density and weed interference duration, a factorial experiment was conducted using a randomized complete block design with 3 replications at the rice research institute of iran (rrii) in rasht, in the 2008 growing season. the factors comprised plant density a...

Poppy seed production is susceptible to abiotic and biotic stress weed infestation, which introduces the risk of total crop failure. For purpose minimization, poppy was grown in additive intercropping systems with early late sown white clover spring barley at three different densities a year field trial assess their roles cropping while adding ecological benefits rotation. yielded between 798.7...