نتایج جستجو برای: weed control methods
تعداد نتایج: 2933398 فیلتر نتایج به سال:
Non-chemical weed control methods need to be directed towards a site-specific weeding approach, in order to be able to compete the conventional herbicide equivalents. A system for online weed control was developed. It automatically adjusts the tine angle of a harrow and creates different levels of intensity: from gentle to aggressive. Two experimental plots in a maize field were harrowed with t...
در سال های اخیر هزینه ی کود شیمیایی (اوره) در ایران افزایش یافته و متأسفانه با وجود افزایش قیمت، هدرروی کود از راه های مختلف همچنان یکی از دلایل اصلی کاهش درآمد کشاورزان و تخریب محیط زیست می باشد. حضور علف های هرز نیز از قدیم به عنوان یکی از شایع ترین عوامل کاهش کمیت و کیفیت محصول مطرح بوده است. به منظور بررسی تأثیر روش قرار دادن کود نیتروژن و علف های هرز بر رشد و رقابت علف های هرز، عملکرد و اج...
in order to study of the effect of nitrogen source, operation method and weed control methods on weed biomass, yield and yield components of corn (zea mays l.) an experiment was carried out as split plot factorial based on randomized complete block design (rcbd) with four replications in shahrood university of technology. the treatments included weed control methods at four levels (hand weeding...
in this thesis, using concepts of wavelets theory some methods of the solving optimal control problems (ocps). governed by time-delay systems is investigated. this thesis contains two parts. first, the method of obtaining of the ocps in time delay systems by linear legendre multiwavelets is presented. the main advantage of the meth...
in this study, the effects of weed control treatments and plant density on lentil (lens culinaris) yield and yield components as well as weed control efficacy were investigated. the study was conducted according to a split-plot arrangement based on randomized completely block design in three replicates in karaj in 2007-2008. the weed control chemical treatments in four levels (trifluralin herbi...
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