this paper criticizes the model and the new definition for osmotic pressure given by parsafar et al. [j. sci. i. r. iran, vol. 10, no. 4, 233 (1999)]. the model is a closed system containing 1 kg of solvent plus m mole of solute at constant temperature and under pressure p0 + ? where p0 is the standard pressure and ? is the osmotic pressure of the corresponding m molal solution. while the total...

In typical conditions of diamond film synthesis in a EACVD device ~JllectronAssisted Chemical Vapor Deposition), we report on the sudden jumps, bistability, multistability and negative resistance phenomena in methane-hydrogen mixture discharge plasma. We studied the variations of these phenomena with gas pressure, filament current. The difference of discharge characteristic between pure hydroge...

This study was carried out to determine the effect of silage on fermentation quality. The produced by forage yield mixed planting corn and soybeans which planted as a second crop in Mardin ecological conditions. field experiment Randomized Complete Experiment Design with three replications at 7 different ratios [corn (C), 70% + 30% soybean (70C30S), 60% 40% (60C40S), 50% (50C50S), +% 60 (40C60S...

Although the underlying mechanisms remain unknown, soils from different forest types exhibit distinct acidification-buffering capacities. We investigated soil properties and bacterial communities across five plantation horizons in a severely acid-polluted site Southwest China evaluated potential driving differences community structure. Soils collected pure stands of Pinus massoniana Lamb.or Sch...

rice is among the most important food crops throughout the world. hybrid rice benefits from about a 30 percent yield advantage over the conventional pure line varieties and this phenomenon can play an important role in fighting world hunger. to diminish the damage of rice pests, development of insect pest management strategies in hybrid rice is necessary. this study was aimed at evaluating the ...

Management plan model of agricultural planting information technology research and application of design system for agricultural production and digital has important theoretical and practical significance of agricultural planting. The study concluded, extracted the relevant agricultural planting design theory and technology research based on the show, applying the system analysis principle and ...

Wheat (Triticum aestivum L.) was planted as winter crop using raised bed and conventional planting system with four N levels at Regional Wheat Research Station, Rajshahi (latitude 28°75′ N and longitude 92°58′ E), during November to March in 2002 and 2003 to study N content in grain and straw, uptake of total nitrogen, N use efficiency, fertilizer recovery percentage and grain yield. The highes...