نتایج جستجو برای: crop weed competition

تعداد نتایج: 161338  

Journal: :Indian journal of dermatology, venereology and leprology 2007
Chembolli Lakshmi C R Srinivas

Parthenium hysterophorus L. (congress grass, congress weed, carrot weed, wild feverfew, the “Scourge of India”) is an exotic weed that was accidentally introduced in India in 1956 through imported food grains.[1] It has become a common weed causing dermatitis of epidemic proportions.[2] The epithet “congress weed” refers to the US congress (who allocated the shipment for Pune, India).[3] In Pun...

2017
Amit Kumar Mukesh Kumar

ISSN: 2319-7706 Volume 6 Number 9 (2017) pp. 2846-2853 Journal homepage: http://www.ijcmas.com Climate change is a natural and continuous process. But recent relatively rapid change in climate occurs due to anthropogenic activities which makes alarming attention because it contributes largely to global warming by affecting the greenhouse gases (GHGs) and aerosols. GHGs mainly CO2, methane, nitr...

Journal: :تولید گیاهان زراعی 0

crop residue is a non-chemical method of weed control in agricultural sustainable systems. this research was conducted at the alarogh site of ardabilto evaluate the effect of integrated use of mulch and herbicide on weed emergence and growth in potato in 2007. treatments were four levels herbicide including: (1) paraquat [n,n'-dimethyl-4,4'-bipyridinium dichloride] herbicide as pre-pl...

Journal: :حفاظت گیاهان 0
حسینی حسینی راشد محصل راشد محصل نصیری محلاتی نصیری محلاتی حاج محمدنیا قالی باف حاج محمدنیا قالی باف

abstract in order to evaluate the influence of nitrogen application and duration of weed interference on corn (zea mays l.) yield and yield components, a field study was conducted in 2004 at the ferdowsi university of mashhad research field. the experimental design was a randomized complete block with a factorial treatment arrangement replicated three times. nitrogen fertilizer was applied at r...

Journal: :Remote Sensing 2021

Understanding the spectral characteristics of crops in response to stress caused by weeds is a basic step improving precision agricultural technologies that manage field. This research focused on competition between corn (Zea mays) and redroot pigweed (Amaranthus retroflexus), common weed strongly reduces yield. The aim this was characterize physiological changes occur during early growth becau...

بخشنده, عبدالمهدی, زند, اسکندر , سیادت, سیدعطاءاله, عالمی‌سعید, خلیل , موسوی, سید‌هاشم,

In order to study the tolerance mechanism of spring bread cultivars to wild oat competition, an experiment was conducted in research farm of Ramin Agricultural and Natural Resources University of Khouzestan as strip block with three replications during 2010-2011 growing season. Experimental factors were wild oat densities includ 0 (as control) and 80 plant/m2 as horizontal plots and ten wheat c...

Journal: :International Journal of Plant and Soil Science 2023

Inadequate weed control is one of the primary causes a decrease in soybean production. Weeds compete for resources with crops (water, light and nutrients). This competition especially important during early stages crop development, when production losses up to 80 per cent are possible, extreme cases, harvest operations hampered. As result, current study sought identify an effective practice soy...

2014
Henning Nordmeyer Tobias Koch

In the present study, the herbicidal effects of two fungicides with the active ingredients expoxiconazole, fluxapyroxad, pyraclostrobin and fenpropimorph on the two arable weeds Lamium purpureum L. and Chenopodium album L. were investigated. The experiments were conducted in a climate chamber under defined conditions. Sowing pods were prepared and plants at the cotyledon leaf stage were pricked...

2016
Johannes Pfeifer Raghav Khanna Dragos Constantin Marija Popovic Enric Galceran Norbert Kirchgessner Achim Walter Roland Siegwart Frank Liebisch

Background: The EU-project Flourish intends to establish an autonomously operating precision farming system based on the interaction between unmanned ground vehicles (UGVs) and unmanned aerial vehicles (UAVs). For effective mission planning and site-specific ground intervention by the UGV, the growth, mineral nutrition, weed, and health status of the crop field must be evaluated efficiently. In...

Journal: :پژوهش های حبوبات ایران 0
شایسته طاهرآبادی مختار قبادی پژمان اله مرادی

introduction lentil (lens culinaris medik.) is an important legume in the mediterranean area. high protein content in lentil seed (about 22-28%) makes it as a good food source for developing countries and low-income people. in the west of iran such as kermanhah province, it is the most important pulse in rainfed systems cultivated traditionally in rotation with wheat and barley. lentil is grown...

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