in order to evaluate competition among some weed species and canola, a field experiment in astan ghods razavi's field in mashhad was done on 2007-2008. thirty 50×50 cm quadrates were used in two times (stem and flower production) to measure the canola dry weight, leaf area index and canola and weeds density with destruction and thirty similar quadrates were used for counting weed species a...

A field experiment was conducted on medium black calcareous soil at Junagadh (Gujarat) during Rabi season of 2019-20 to study the bioefficacy herbicides and their mixtures for weed management in maize (Zea mays L.). The laid out randomized block design with three replications. treatments comprised of: Atrazine 500 g/ha as PE fb 2,4-D (SS) PoE 30 DAS, halosulfuron-methyl 60 tembotrione 100 topra...

Maize (Zea maize L.) is one of the major cereal crop produced worldwide after wheat and rice mainly as food for human animal feed .maize most sensitive to weed competition during its early growth stage control an important management practice production that should be carried out ensure optimum grain yield. Weeds compete with corn plants resources such light, nutrients, space, moisture, water, ...

a field experiment was conducted in research farm of isfahan university of technology, isfahan, iran in 2011 . various weeding periods were investigated on growth and yield of potato under drip tape and furrow irrigation systems. a split plot arrangement was used in a randomized complete block design with three replications. irrigation treatments were included in main plots and periods of weed ...

Producers are interested in tactics for managing crop residues when growing corn after spring wheat. We compared five systems of managing spring wheat residues: conventional tillage, no-till, strip-till, cover crop (hairy vetch) with no-till, and cover crop with strip-till following spring wheat. Conventional tillage consisted of chisel plowing and disking, whereas strip-till consisted of tilli...

abstract in order to investigate the effects of nutrient resources and weed management on qualitative and quantitative criteria of cat tyme (teucrium polium), an experiment was conducted as split plot based on a complete randomized block design with 3 replications at the agricultural research station, ferdowsi university of mashhad, iran, during the years 2008 and 2009. treatments included diff...

(Phenology, fruit set and dispersal of Cordia multispicata Cham., an important weed shrub of abandoned pastures in eastern Amazonia). The reproductive ecology of the distylous tropical shrub Cordia multispicata was studied in an abandoned pasture in Paragominas County , Pará state, Brazil. It is a common species in the Amazon basin where it occurs as a weed in open and disturbed habitats. C. mu...

Gene flow is a crucial parameter that can affect the organization of genetic diversity in plant species. It has important implications in terms of conservation of genetic resources and of gene exchanges between crop to wild relatives and within crop species complex. In the Beta vulgaris complex, hybridization between crop and wild beets in seed production areas is well documented and the role o...