List of Articles weeds dry weight

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  1 - Effect of weed management at different levels of sulfur coated urea on yield and qualitative traits of Beta vulgaris
  Einollah Hesami
  In order to evaluate of weeds control at different levels of sulfur coated urea on yield and qualitative characteristics of sugar beet, a study was carried out as split plot design in randomized complete blocks design with four repetitions in Shoushtar region during 201 More

  In order to evaluate of weeds control at different levels of sulfur coated urea on yield and qualitative characteristics of sugar beet, a study was carried out as split plot design in randomized complete blocks design with four repetitions in Shoushtar region during 2016. Experimental treatments consisted of four different levels of sulfur coated urea (SCU) (0, 150, 180 and 250 kg.ha-1). The use of herbal treatments of chloropyralide + Des Modifam + Moeifam + Autophamousite and metamitron + Modifem + Autophamousite as a sub-agent. The results showed that weed dry weight was affected by different amounts of urea with sulfur coating and increased with increasing sulfur content of urea, which increased the weed weight of weeds, so that it was highest in application of the highest amount of urea with sulfur content per hectare with no weeding of weeds. The amount of 237 grams per square meter was obtained. Also, in the effects of fertilizer interaction and weed control, the highest yield of sugar beet (13421 kg) was attributed to full weed treatment and the highest application rate of sulfuric urea. The highest root yield of sugar beet (57004 kg ha-1) was related to weed control and application of the highest amount of sulfur urea. Among the weed control treatments, the highest root yield of sugar beet (46711 kg.ha-1) was obtained in metamitron + Des medifam + Autophamousite herbicide application and application of the highest amount of urea with sulfur content per hectare. Also, the highest percentage of pure sugar in the treatment of non-application of sulfur content of urea with non-control of weeds was 18.6% and 20.30%, respectively. In general, it can be said that Urea fertilizer with sulfur coating with the use of Médifam + Des Moiifam + Autophamousite + Metamitron has the optimum performance of sugar beet.   Manuscript profile
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  2 - Evaluation of yield, yield components and nitrate leaching in soybean cultivation affected by different types of fertilizers and weed interference
  Mahmood Ramroudi Javad Mahmoudi Mehdi Dahmarde Mohammad Galavi
  Among the several factors reducing plants yield, weed interference has great important. To investigate the effect of fertilizer types and weeds management on yield, yield components and nitrate leaching in soybean an experiment was conducted as split plots in randomized More

  Among the several factors reducing plants yield, weed interference has great important. To investigate the effect of fertilizer types and weeds management on yield, yield components and nitrate leaching in soybean an experiment was conducted as split plots in randomized complete block design with three replications in Chalus city in summer of 2013 and 2014. Fertilizers types including chemical fertilizer, manure and nano-chelates spraying as the main plot and weed control in three levels including emergence to flowering, critical period of weed interference and no weeding were considered as sub-plots. The results showed that yield with weeding during the critical period as well as weeding until flowering was achieved in a statistical group and were significantly more than non-control treatment. The highest weeds dry weight was obtained in gweed infested treatment and increasing in weed control time caused their weight loss. Among the fertilizer treatments, the highest dry weed weight was observed by chemical fertilizer application. Maximum nitrate concentration at a soil depth of 80-100 cm were obtained by using chemical fertilizer. Weeds dry weight increased and the nitrate concentration decreased when the weeds control duration was reduced. In general, the results showed that weed control during the critical period increased the grain yield by increasing the yield components. Manuscript profile