common bacterial blight (cbb) of bean caused by xanthomonas axonopodis pv. phaseoli is a seriously important disease that adversely affects the quantity and quality of seed. cultivation of resistant cultivars is the most effective method of  the disease control. to identify disease resistant genotypes of selected beans, an experiment was conducted in  agriculture and natural resources research ...

development of remote sensing (rs) and gis techniques and that of landscape metrics in the late 1980s have caused to introduce a new dimension in the landscape ecology arena (the relationship between spatial patterns and ecological processes). however, scale dependence of some of landscape metrics and rs systems of different spatial resolution has resulted in particular attention into selection...

to study the effect of harvesting time on soybean seed germination and vigor a factorial experiment with three replications, including of five harvesting time and three soybean cultivars was carried out in the field and glasshouse. the effect of harvesting time on seed germination percentage (in the field, cold test and paper test), seed germination rate, shoot and root weights, 1000-seed weigh...

drought as a climatic phenomenon affected many different environmental issues and generally is associated with the decreasing in average precipitation. evaluation and monitoring of the drought is a fundamental step in proper programming of water resources management. regarding the recent conditions water scarcity in the urmia lake basin, assessment of the drought index in this region is inevita...

the present study was carried out to determine the effects of fish oil long-chain fatty acids and thyme essence supplementation on performance and carcass traits in mahabadi goat kids. twenty-eight mahabadi goat kids (average initial bw of 17/8 ± 2/8 kg, 4-5mo) were randomly assigned to four treatments of: 1. control (basal diet), 2. 0.2% thyme essence, 3. 2% fish oil, and 4. 2% fish oil +0.2% ...

to evaluate symbiotic effectiveness and salt tolerance of sinorhizobium meliloti strains, 50 rhizobial strains were isolated from root nodules of medicago sativa cultivated in tehran and zanjan fields. under n-free conditions, the symbiotic effectiveness of different sinorhizobium meliloti strains of bami cultivar were evaluated under greenhouse conditions using 50 sinorhizobium meliloti strain...

car manufacturing industry is considered one of the major national industries, which due to its increasing product, particularly in recent years, has played a crucial role in the economy of the country, and still continues to do so. with the development of manufacturing capacity in the car industry, a relative competition is being witnessed among the manufacturers, which calls for the considera...

in the present experiment, the effects of nitrogen and phosphor fertilizer application in two methods of furrow and trickle irrigation on the yield and quality of sugar beet seed cultivar 7233 were studied. the experiment was conducted as a split factorial in a completely randomized block design with three replications during 2003 and 2004 in hamedan province. main plots were allocated to irrig...

calla lily, an ornamental bulbous plant from araceae family (consisting of seven species) is characterized by spadix inflorescence and utilized for cut flower as well as for pot plant. a greenhouse study was conducted in university college of agriculture and nature resources of tehran university, to evaluate the quantitative and qualitative characteristics of pot plant of calla lily. the type o...

small precipitation with temporal and spatial variation of rainfall is the main responsible factors on flood occurrence in arid and semi arid regions. floods in their regions usually contain high concentration of sediments which when they are deposited on the surface of lands, they change the properties of soils of the area. in this research, the effect of floodwater spreading on physic-chemica...