جستجوی مقالات مرتبط با کلیدواژه « ایران » در نشریات گروه « کشاورزی و باغداری »

For evaluation of efficiency and yield per surface unit with using the 56 sugar beet producer countries data in year 2005 an econometric model based on COLS method has presented. With this model maximum sugar beet production efficiencies considering the harvested area and annual rainfall measure and level of mechanization has been determined. In total Iran with production efficiency 0. 43 is in rank 22 of the world and France with production efficiency 1 has the maximum sugar beet production efficiency in the world. In continuance of discussion relation between the countries sugar beet harvest area، annual rainfall measure and level of mechanization with their efficiency and yield in sugar beet production has tried to be studied.

The comparative advantage of Iran kiwi production and the effects of governmental applied policies on the production process of kiwi fruit investigated over the period 1998-2003 by using policy analysis matrix. Iran has had comparative advantage in the production of this crop, but the profitability of this crop has been decreased in 1998-2003. The amount of domestic resource cost index has increased from 0.39 in 1998 to 0.92 in 2003. So governmental applied policies in sale market was not in direction of export extension of kiwi and its money-gaining. The incrase in the amount of the index of nominal protection coefficient of input from 0.67 to 1.2 and also the increase in the amount of nominal protection coefficient index from 0.51 to 1.3 reveal that despite the lack of the factor support of this crop, the support in crop sale market has existed and in general, the effects of government intervention in the crop production process have been in favor of producers in domestic market and the amount of effective protection coefficient index has increased from 0.5 to 1.31.

On the basis of acreage، production and import amounts، maize is one of the strategic products in Iran، Regarding defects of marketing system of maize، in this analysis using yearly observations between 1368 to 1385 (18 years) and Eviews software، the marketing and econometric model of maize marketing margin was studied. The results show that the most important factor in the maize marketing margin is its wholesale price. Therefore، price policies are governmental effective policies on the maize marketing margin، consequently it is necessary that for making marketing margin equitable is done the necessary. Also the efficiency of maize marketing system is not suitable and this has led to the increase of maize marketing margin. So، establishment of cooperatives of crops production and distribution (consisting farmers، wholesalers and brokers)، presentation of the whole imported maize by private sector and produced maize in the country by exchange are recommended.