نتایج جستجو برای: weed cover

تعداد نتایج: 120546  

Journal: :Environmental entomology 2013
Alexandria Bryant Daniel C Brainard Erin R Haramoto Zsofia Szendrei

Cover crop mulch and weeds create habitat complexity in agricultural fields that may influence arthropods. Under strip-tillage systems, planting rows are tilled and preestablished cover crops can remain between rows. In field experiments conducted in Michigan in 2010 and 2011, a preestablished oat (Avena sativa L.) cover crop was allowed to grow between rows of strip-tilled cabbage and killed a...

1997
G. D. Hoyt

Conservation tillage systems provide optimum conditions to reduce soil erosion and increase surface soil organic matter. This experiment was established with the longterm goal of developing conservation tillage systems that use either chemical inputs to produce vegetables and control pests, or legume cover crops, biological pesticides, and tillage to provide plant nutrition and control pests. T...

Journal: :Plant Soil and Environment 2021

The paper presents species richness and composition of arable weed vegetation in the region West Bohemia (Czech Republic) different types farming (conventional organic) grown crops (winter spring cereals, wide-row crops). During field survey years 2007 to 2017, 105 phytocoenological relevés were recorded. average one relevé was significantly higher organic farming, as well total cover. lowest f...

Journal: :فصلنامه علمی اکوفیزیولوژی گیاهان زراعی 0

the trial randomized complete block design with four replications in summer 1394 in a farm located in the share ray to study the effects of different methods of weed control on the yield and quality of forage maize varieties (sc.704) was performed. the experiment consisted of black plastic mulch, black plastic mulch silver, vetch cover crop with a density of 100 per cent, with 50 per cent vetch...

Application of intercropping systems is one of the ecological methods for controlling weeds due to maximization of soil cover and plant diversity. In order to study the effect of intercropping system of indigo (Indigofera tinctoria L.) and roselle (Hibiscus sabdariffa L.) on biodiversity, weeds population changes and plant yield an experiment was conducted based on randomized complete block des...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد 1375

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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