drought stress is one of the important environmental factors reducing grain yield of plants in arid and semiarid regions. study the effect of water deficit stress on yield, water use efficiency and harvest index of sesame varieties, this experiment was conducted as a split plot based on a randomized complete block design with three replications, at agriculture and natural resources research cen...

Successful implementation of water-quality management requires accurate scientific knowledge of water systems and sound judgment about environmental policy. This dual requirement calls for interactions between water scientists, managers, and policy experts who can jointly interpret and synthesize the data necessary for decision-making. With regard to non-point source (NPS) pollution in the Unit...

this paper studies one of the most important problems of those countries that are confronted with the water deficit and competition of rivals for the water allocation. in this research, by discussing on the currently used methods for minimum environmental water definition in iran, a method that is applicable efficiently and more precisely in the areas with no biological habitat data is introduc...

for a suitable irrigation programming and an efficient management, crop coefficient determination for different plant growth stages are necessary. in this investigation water requirement, single and dual crop coefficient of rosmarinus officinalis l. was determine by drainable lysimeter in a semi-arid climate condition. by using of drainable lysimeter, the exact water requirement and also kc val...

unsustainable harvesting of agricultural water resources in the province of kerman, has caused an annual average of one-meter drop in ground water levels. surface irrigation methods in pistachio trees have low efficiency because of inherent characteristics and its incorrect application, as well as low access to water resource in pistachio regions. therefore under the current critical condition,...

Crop production process utilizes input energy and produces some biomass energy as output.  During this process, greenhouse gases (GHGs) are also emitted which can make environmental risks. In this study, input and output energies, energy indices, and GHG emissions arising from inputs were estimated for wheat-cotton rotation under different tillage practices in Fars province. The study was condu...