نتایج جستجو برای: weed infestation
تعداد نتایج: 20719 فیلتر نتایج به سال:
Population models are particularly helpful for understanding long-term changes in the weed dynamics associated with integrated management (IWM) strategies. IWM practices controlling L. rigidum of high importance, mainly due to its widespread resistance that precludes chemical control as a single method. The objective this contribution is simulate different scenarios special emphasis on impact l...
The paper presents the results of research on biological and economic efficiency new herbicide Femida, OD (2,4 D-acid, 320 g/l 2-ethylhexyl ester + 4.2 chlorsulfuron) produced by Schelkovo Agrohim, Ltd., Russia. It’s established that with protection winter wheat at tillering stage in spring reduction infestation annual perennial weeds amounts to more than 85 %, particular, blind weed,
 lam...
A compact airborne spectrographic imager (CASI) was used to obtain images over a field that had been set up to study the effects of various nitrogen application rates and weed control on corn (Zea mays ). The objective was to determine to what extent the reflectances obtained in the 72 visible and near-infrared (NIR) wavebands (from 409 to 947 nm) might be related to differences associated with...
Weed infestation happens when there is intense competition between rice and weeds for light, nutrients water. These conditions need to be monitored controlled lower the growth of as they affected crops production. The characteristics are challenging differentiate macroscopically. However, information can acquired using a spectral signature graph. Hence, this study emphasises weed species in fie...
این آزمایش با استفاده از طرح بلوکهای کامل تصادفی با 8 تیمار و در 3 تکرار با هدف اصلی تعیین دوره بحرانی رقابت علفهای هرز با سیب زمینی در مزرعه مرکز تحقیقات کشاورزی خراسان انجام شد. تیمارها شامل دو گروه 4 تایی بودند. در گروه تیمارهای (weed free) به مدتهای 3، 6، 9 و 12 هفته پس از سبزشدن سیب زمینی، مزرعه عاری از علفهای هرز نگه داشته شد و در گروه تیمارهای (weed infested) به مدتهای 3، 6، 9 و 12 هفته ...
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