introduction: weather features and their variations have an important role in the yield of agricultural products, especially in rain-fed conditions. the main metrological variables that affected yields consist of precipitation, temperature, soil moisture and solar radiation. also, drought is one of the major constraints to production, especially the mid-season drought which occurs during the po...

1991). These properties include soil bulk density and chemical properties. This study investigated the relationships between corn (Zea mays An objective of site specific management is to apply L.) grain yield and weather over a range of soil rooting depths with appropriate levels of agricultural inputs to localized areas. and without irrigation. The purpose was to test if variability of corn Si...

Higher weather volatility may be reflected in higher incidences of weather shocks. Weather shocks could potentially affect the supply of agricultural commodities and their prices. In this study, the effects of weather shocks on agricultural commodity prices in Central Asia are investigated at the provincial scale using monthly data for the period of 2000-2010. The study uses an innovative estim...

the estimation of effective rainfall is an important technique for exploiting the rainwater resource, planning for irrigation in irrigated agriculture, and determining changes in dryland wheat products for country's macroeconomic management. in this research, a two-layer soil-water balance model based on a new approach has been formulated to estimate the effective rainfall in dryland wheat crop...

The staged addition of feed to fertilized fish ponds was evaluated by adding fertilizers to 15 ponds stocked with Nile tilapia Oreochromis niloticus, then adding feed at half ad libitum rates once fish in the ponds reached a target weight. Each pond was stocked with 750 fish (3 fish/mz), and each treatment included three ponds with first feeding at (a) 50 g, (b) 100 g, (c) 150 g, (d) 200 g, and...

This paper estimates the economic impact of climate change on Indian agriculture. I estimate the e¤ect of random year-to-year variation in weather on agricultural output using a 40-year district-level panel data set covering over 200 Indian districts. These panel estimates incorporate farmers’within-year adaptations to annual weather shocks. I argue that these estimates, derived from short-run ...

introduction: the increasing global consensus built on empirical evidence, expresses that the world, is facing a threat from climate change. as a result, this can affect the agricultural sector through its productivity changes and so influence food security in the world. this can be more intuitive for countries that are dependent on agriculture. agriculture is an important sector in iran that p...

Ongoing climate change is already affecting crop production patterns worldwide. Our aim was to investigate how increasing temperature and CO 2 as well changes in precipitation could affect potential yields for different historical pedoclimatic conditions at high latitudes (i.e., >55°). The APSIM model used simulate the productivity of four annual crops (barley, forage maize, oats, spring...

grass pea(lathyrus sativus l.) is a crop used for both animal and human consumption. recently, icarda has developed new grass pea lines with the objectives of improving its yield potential and adaptability. the objective of this study was to investigate grain and forage yields stability of several icarda released grass pea lines by using additive main effects and multiplicative interactions (am...