abstract agriculture activity is obvious type of unsafely and risky activities that this part had dealt with lack of trast about amount of production and price as unpleasant atmosphere phenomona, calamities, kind of plant diseases and change in prices. insurance is one of important cases for decreasing risk in agriculture. the main of this research is consideration crop insurance’s affect on op...

the purpose of this study, determining the optimal cultivation pattern by using interval mathematical programming approach among the farmers of esfarayen county before and after targeting the subsidies. for this purpose, farmers based on water resources classified in three group of using the river water, deep wells water and rainfed cultivation. the required data for this study has been obtaine...

a four-year field experiment was conducted to understand the characters of nutrient accumulation and distribution in maize under different yield levels, so as to provide scientific guidance for effective utilization of mineral fertilizers, and eventually for high yield of spring maize. the grain yield, nutrient (nitrogen, phosphorous, potassium) accumulation and uptake efficiency were evaluated...

abstract- this study aims to model optimal cultivation pattern based on the maximization of importing virtual water and social net income of major crops in marvdasht, iran. for this purpose, a linear programming model was developed considering constraints of virtual water and land limitations followed by other models to include employment restrictions. based on the findings, wheat and tomato we...

using telser and kataoka models of probabilistic-risky mathematical programming, the present research is to determine the optimized pattern of cultivating the agricultural products of shoshtar region under risky conditions. in order to consider the risk in the mentioned models, time period of agricultural years 1996-1997 till 2004-2005 was taken into account. results from telser and kataoka mod...

the purpose of this study is to investigate comparative advantages of corn in comparison with other competitor crops. to do so, linear programming, to 2004-2005 data related to classic index (drc) in kermanshah province was applied. results showed that corn has comparative advantages in all regions of kermanshah province while in optimal cultivation pattern of 37.5 percentages of regions in exi...

to assess the effect of non chemical management of weed control on forage sorghum (sorghum bicolor) a field study was conducted in varamin, iran during 2010 crop year in a three- replicated- split factorial experiment laid out in randomized complete block design with four weeding levels (w1= one time cultivation at 3-leaf stage using a duck foot cultivator, w2= two times cultivation at 3 and 5-...

in farming activities, various resources and inputs are utilized to produce agricultural products.. one of the most important goals of agricultural managers and programmers is to assess the optimal resource allocation for designing an appropriate cultivation pattern. mathematical programming is a common approach to achieve the optimal pattern. in this study, the two approaches of fuzzy de-novo ...