the effect of nitrogen (n) levels on n uptake by high weed densities at early growth stages of corn (zea mays l., cv. double cross 370) was investigated for two years (2008-2009) at the agricultural research station of shiraz university. the experiment was arranged in a split-plot arrangement in the randomized complete blocks design with three replications. two levels of weed control (weedy and...

in order to study the competition effects of redroot pigweed (amaranthus retroflexus) and millet (panicum miliaceum) on maize performance under different rates of n fertilizer, a field experiment was conducted in 2009 in the research fields of tarbiat modares university in tehran as a randomized complete block design with factorial arrangement of treatments and three replications. accordingly, ...

Registered dose of herbicides may be higher than rate required for controlling weed species depending on growth stages. In order to study the effect of individual post-emergence application of 2,4-D plus MCPA and three sulfonylurea herbicides at four- to six-true leaf stage of weeds, experiments were conducted in 2011 at the greenhouse of Agricultural Faculty of Ferdowsi University of Mashh...

Abstract The development of glufosinate-resistant soybean cultivars has created opportunities for use glufosinate applied postemergence weed control. Four field experiments were conducted in 2021 and 2022 to ascertain the effect rate addition ammonium sulfate on annual control glyphosate/glufosinate/2,4-D–resistant soybean. An increased 500 from 300 g ai ha −1 improved common ragweed, lambsquar...

in order to study the effect of water hardness on sinosulforun efficacy an experiment was carried out under controlled conditions in 2010 at the college of agriculture, ferdowsi university of mashhad. treatments included herbicides doses at 6 levels (0, 200, 250, 300, 350 and 400 g.a.i ha-1), calcium carbonate concentration at 6 levels (0, 100, 300, 600, 1000 and 1500 ppm) and weeds at 2 levels...

A two year field experiment was carried out to evaluate the effects of municipal waste compost (C), composted cattle manure (M), and nitrogen (N) on growth and composition of weeds in a corn field in Shiraz using a split-split plot design with 3 replicates. Visual inspection of the plots showed that the manure treatments neither introduced new weed species nor increased weed density more than t...