abstract in order to evaluation the effects of price policies (wheat guarantee price in each period and its price lag), environmental (planted area) and climatic (min and max average temperature, total annual precipitation, cold-day degree and hot-day degree) factors, we considered wheat yield in razavi-khorasan province (9 cities) for a 13-year statistical period (1371-72 to 1383-84). in this ...

because of importance of morphological characteristics, canopy temperature and their relationship with grain yield in rice varieties, an experiment was conducted based on split plot in a randomized complete block design with three replications in two years (2013-2014) at the college of agriculture, university of guilan. the experiment consisted of three transplanting times (5, 20 may and 5 june...

This paper proposes and implements an equilibrium valuation framework for weather derivatives. We generalize the Lucas model of 1978 to include the weather as a fundamental variable in the economy. The model is specialized to temperature derivatives. Temperature behavior for the period of 1979-1989 is closely studied for ̄ve major cities in the U.S., and a model is proposed for the daily temper...

background: many studies have been done in order to interpret correctly the results of ethanol analysis and its related problems. unfortunately, it was not easy to determine bac rate, due to postmortem different conditions or personal and clinical differences in metabolism and excretion of ethanol. the time between death and autopsy, the environmental conditions (temperature and humidity) are i...

BACKGROUND Our study aims to obtain estimates of the size effects of temperature extremes on infant mortality in Bangladesh using monthly time series data. METHODS Data on temperature, child and infant mortality were obtained for Matlab district of rural Bangladesh for January 1982 to December 2008 encompassing 49,426 infant deaths. To investigate the relationship between mortality and temper...