rice is a main food for iranian people and has an important role in providing food security. regarding the population growth, increase of rice production and reduction of losses have special importance in prevention of rice import. rice losses in the harvest stage are the highest through the whole production period of this crop and hence the reduction of these losses is necessary. provision of ...

Abstract China plays an important role in the international trade of agricultural commodities. Considering dynamic reactive nitrogen (Nr) losses systems China, a hypothesis was proposed that crop conversion would be correlated with extent trade, influencing Nr systems. The objective this study to verify based on hybrid approach, which incorporated life cycle analysis (LCA), copula–Markov chain ...

The assessment of crop yield losses is needed for the improvement of production systems that contribute to the incomes of rural families and food security worldwide. However, efforts to quantify yield losses and identify their causes are still limited, especially for perennial crops. Our objectives were to quantify primary yield losses (incurred in the current year of production) and secondary ...

Both the percent of producers reporting and the value of wildlife-caused losses increased from 1989 to 1994. In 1994, 58% of respondents reported wildlife-caused losses of their agricultural commodities, an increase from the 55% of respondents who reported losses in 1989. Based on the median value of producer-estimated loss, wildlifecaused losses cost producers approximately $591 million in 199...

If the ideal of assured "Food for All" is to be attained, it will be necessary to do a better job of preventing the debilitation or destruction of crop plants by noxious weeds, voracious animals, and devastating plant diseases. For these destructive agents continually tend to nullify the constructive efforts to increase food production. Food production per unit area of land has been increased g...

Nitrogen (N) cycling was determined in monocultures of Sorghum bicolor (L.) Moench and alley cropped sorghum with Acacia saligna (Labill.) H. Wendl. in semiarid Northern Kenya. N input through biological N2 fixation of the acacia, N transfer from the legume to the intercrop and losses of applied N through harvest and 15 leaching were estimated using N enrichment. The biological N fixation and N...