نتایج جستجو برای: pattern of cultivation
تعداد نتایج: 21182210 فیلتر نتایج به سال:
river of the most important factors in the cycle of erosion and geomorphologic process and present their studies on the wide are. in this research , the purpose of understanding factors that influence changes geomorphologic middle part of the river bed and atrak river review these changes has been the domain. this area is located between the villages of ghazan ghaye to chat in golestan province...
looking back into the past shows that iran has always been faced with water shortages, and this has not been a problem confined to a certain period or generation. therefore, proper attention to optimal use of water resources and a move towards sustainable use of extant water resources is indispensable. in this study, using multi period mathematical programming model, the effects of the two goal...
The efficient use of water resources, soil, and climate parameters as the main pillars of plant sustainable production requires land suitability evaluation for each crop and area. This research was conducted to evaluate land suitability for walnut cultivation in Iran using geographic information system (GIS). For this purpose, the climate data obtained from 375 synoptic stations of Iran, the ge...
The sowing area and yield of crops are primarily determined by climatic suitability modified terrain conditions. This study presents the actual ten major in Europe reveals spatial pattern available soil phosphorus concentrations between within areas crops, based on LUCAS database. A great variance cropping over was observed, especially for with a broad tolerance. Results show significant differ...
Fragrant tuberose is the most important scented cut flower of Iran, which rank 4th among other cut flowers, based on the cultivation area and production. Due to the scarcity of water resources, soil constraints, and the aim of comparison and possible substitution of soil cultivation with soilless cultivation of tuberose, a pot experiment was conducted as factorial, based on completely randomize...
One of the fundamental difficulties in Iranian rangelands is the existence of wide area of poor condition rangelands that their grazing capability is low due to continuous livestock grazing pressure. Astragalus flexilipes is one of the palatable plant species of rangelands in Iran, while its distribution is being decreased due to improper grazing. The aim of this study was to ...
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