background and objectives: early watergrass (echinochloa oryzoides) is considered as a new-introduced species and then as a potential invader. investigation of competitive traits of this species, in comparison with barnyardgrass (e. crus-galli), one of the most important weeds in rice fields of guilan province, would be useful to determine its spreading possibility as an aggressive weed. theref...

oroginal article tiller is a handy multi – a purpose tractor is used in agriculture. the noise emitted from tiller may be seriously affected auditory system users. the purpose of this study was to evaluate the exposure to noise in operators of this device. in this study 36cultivator tiller was examined. measurement of sound is based in iso 5131-1996 and iso 7216 standard and was conducted in in...

to evaluate tolerance of rice genotypes (oryza sativa l.) to soil/water salinity and to utilize selected tolerant genotypes in rice breeding program and further agronomy and physilogical studies 56 rice genotypes have been evaluated. of which 40 rice genotypes from international rice research institute (irri) together with 16 selected tolerant rice genotypes have been tested in two separate exp...

to evaluate the effects of mycorrhiza symbiosis in increased tolerance to drought stress in wheat (triticum aestivum) an outdoor greenhouse experiment was conducted at islamic azad university, sabzevar branch in 2012-2013. experiment was conducted as factorial arrangement in a randomized complete block design with three replications. factors were: mycorrhiza fungi type (glomus mosseae, glomus i...

Abstract Purpose Soil water repellence causes uneven soil wetting which can constrain dryland crop and pasture establishment yield. The same processes are likely to affect nutrient availability from fertiliser, but the effects of on growth nutrition per se have seldom been reported. Here, we investigated early wheat ( Triticum aestivum cv. Mace) uptake responses repellence. Methods Wheat was fu...

Grain yield in wheat (Triticum aestivum L. emend. Thell.) is highly dependent upon the number of spike-hearing tillers produced by each plant. Soil salinity can greatly decrease their number and productivity. Knowing the contribution of specific tillers is essential for breeding salt-tolerant genotypes and for developing wheat growth simulation models. Our objective was to determine the effects...