نتایج جستجو برای: weed biology

تعداد نتایج: 174253  

2017
Rosana Ferrero Mauricio Lima Adam S. Davis Jose L. Gonzalez-Andujar

Managing production environments in ways that promote weed community diversity may enhance both crop production and the development of a more sustainable agriculture. This study analyzed data of productivity of maize (corn) and soybean in plots in the Main Cropping System Experiment (MCSE) at the W. K. Kellogg Biological Station Long-Term Ecological Research (KBS-LTER) in Michigan, USA, from 19...

2005
Stevan Z. Knezevic

Integrated weed management (IWM) advocates the use of a combination of preventive, cultural, mechanical, and chemical tools to keep weed pressure below threshold levels that reduce yields and profits. Herbicide tolerant crops (HTCs) represent a relatively new weed control technology that can be used in an integrated weed management program. These crops, which enhance weed control options and gr...

Journal: :Agronomy 2023

Our changing climate will likely have serious implications on agriculture production through its effects food and feed crop yield quality, forage livestock production, pest dynamics, including troublesome weed control. With regards to weeds, climatic variables control many plant physiology functions that impact flowering, fruiting, seed dormancy; therefore, an altered can result in a species co...

ژورنال: علوم آب و خاک 2000
اقتداری نایینی, عبدالرضا , غدیری, حسین ,

In order to find the critical period of weed control, the best time of weed control beginning (i.e. herbicide application time), and the length of weed control period (i.e. herbicide persistency) in corn, field experiments were conducted in Bajgah and Kooshkak in Fars Province in 1995 using a randomized complete block design with 14 treatments and four replications. Treatments consisted of diff...

2012
Khagendra Raj Baral

Despite weeds are a serious threat to promotion of organic farming, relatively less attention is given to research on weed management. This article explores a scope of integration of conservation agriculture for weed control and soil protection under organic farming. Limitation in the use of agro-chemicals under OF promotes intensive tillage for weed control. Mostly, tillage leads to depletion ...

2010
Randy L. Anderson

Weeds are a major obstacle to successful crop production in organic farming. Producers may be able to reduce inputs for weed management by designing rotations to disrupt population dynamics of weeds. Population-based management in conventional farming has reduced herbicide use by 50% because weed density declines in cropland across time. In this paper, we suggest a 9-year rotation comprised of ...

Journal: :Anais da Academia Brasileira de Ciencias 2014
Caio D Guzzo Leonardo B de Carvalho Paulo R F Giancotti Pedro L C A Alves Elaine C P Gonçalves José V F Martins

Rubber tree production is reduced by weeds that compete for environmental resources; therefore, the timing and duration of weed control influences weed interference. The objectives of this study were to evaluate the growth of rubber tree (Hevea brasiliensis) plants, to determine the critical period for weed control, and to evaluate the growth recovery of rubber trees that coexisted with weeds f...

Journal: :علوم گیاهان زراعی ایران 0
جمشید نظری عالم حسن علیزاده حمید رحیمیان مشهدی

grand cherry (physalis divaricata) is considered as the most problematic weed in sugar beet farms in alashtar county, iran. special experiments involving chemical control of this weed were carried out using trifluralian, etalfluralian and chloridazon herbicides under laboratory conditions. the experiments were designed in a randomized complete block design in three replications, carried out in ...

اقتداری نایینی, عبدالرضا , غدیری, حسین ,

In order to find the critical period of weed control, the best time of weed control beginning (i.e. herbicide application time), and the length of weed control period (i.e. herbicide persistency) in corn, field experiments were conducted in Bajgah and Kooshkak in Fars Province in 1995 using a randomized complete block design with 14 treatments and four replications. Treatments consisted of diff...

2000
L. Tang L. F. Tian B. L. Steward

An experimental machine vision-based patch-sprayer was developed. This sprayer was primarily designed to do real-time weed density estimation and variable herbicide application rate control. However, the sprayer also had the capability to do high-resolution weed mapping if proper mapping techniques being integrated. Two weed mapping methods were developed. One is GPS signal-based off-line weed ...

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