to examine the effect of mixing graminicide herbicides with liquid fertilizer in gorgan region, an experiment was conducted as factorial arranged in complete randomized block design (rcbd) with three replications at the research farm of islamic azad university of gorgan. the first factor was using topic, pumasuper and axial herbicides with the amounts of 0.8, 1, and 0.5 l/ha-1, respectively. th...

A total of 141 lactation records from 70 F, Friesian d x Bunaji & cattle maintained at the National Veterinary Research Institute's dairy farin, Vom, 1970 - 1975 was utilized. Measurements were made milk production traits economic importance, Average yield 1694 kg in 258 days. Mean 305 day 1896 kg. The third and fourth lactations superior to first second (P <0.05). Differences lengths sm...

Barley and pea plants were grown under several regimens of different compositions of soil atmosphere, the O(2) concentration varying from 0 to 21% and the CO(2) concentration from 0 to 8%. In absence of CO(2), the effect of O(2) on root length in barley was characterized by equal root lengths within the range of 21 to 7% O(2) and a steep decline between 7 and 0%. In peas, while showing the same...

【Objective】 In order to quantify the yield formation of protected tomato, 【Method】 the field experiments on varieties and fertilizer were conducted in 2009 and 2010, and cultivars: (B1) American mole 1 (early maturing), (B2) Chaoshijifanqiedawang (late maturing), and (B3) American 903 (medium maturing) were adopted; The models of dry matter production and yield formation for protected tomato we...