food security has a dynamic notion during the time and may be affected by various domestic and global factors.nevertheless, iranian policy makers consider food security as same as self-sufficiency in agricultural food products, particularly wheat production. however, self-sufficiency can contribute to food security only if it is in coincidences with comparative advantage and sustainable resourc...

Background Fiscal policy targeting tobacco control is identified as the most effective strategy for rapid control of tobacco use. An optimum fiscal policy to estimate the percentage taxation that will maximise the government tax revenue, social savings and the net monetary benefit has not been empirically designed before in Sri Lank...

the effects of planting date and single irrigation (si) allocation scenarios on increasing and stability of yield were investigated to determine the total water productivity and economical water productivity (wpe), for rainfed wheat at dryland agricultural research institute in maragheh, iran, during 2000-2004. the treatments included three sowing dates (early, normal and late), four allocation...

abstract in this study, seven main field crops of the rudasht and abshar irrigation networks of esfahan (with 54,000 ha designed command area) such as wheat, barley, onion, sunflower, fodder mays and sugar beet were selected and swap model was calibrated by inverse modeling base on field experiments results in order to determine crop water salinity production functions. field experiments were c...

in order to obtain the maximum benefit, yield increasing and its stability a supplemental irrigation field experiment was conducted as split plot arranged in a randomized complete block design (rcbd) with three replications during 1999-2002 at maragheh agricultural research station of dari. the treatments included four levels of irrigation (average of three years: 0, 95, 151 and 207 mm) as main...