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...

The impact of soil nutrient depletion on crop production has been known for decades, but robust assessments of the impact of increasingly unbalanced nitrogen (N) and phosphorus (P) application rates on crop production are lacking. Here, we use crop response functions based on 741 FAO maize crop trials and EPIC crop modeling across Africa to examine maize yield deficits resulting from unbalanced...

Nitrous oxide, carbon dioxide and methane are the main biogenic greenhouse gases (GHG) contributing to net greenhouse gas balance of agro-ecosystems. Evaluating the impact of agriculture on climate thus requires capacity to predict the net exchanges of these gases in a systemic approach, as related to environmental conditions and crop management. Here, we used experimental data sets from intens...

In crop insurance design, the yield guarantee and the premium are very important parameters, both of which depend upon the yield distribution. Accordingly, the accurate modeling of yield distribution is essential for designing crop insurance contracts. This study employs historical county-level yield data for irrigated and dry wheat in East Azarbaijan Province, Iran for 1975-2013 to evaluate th...

A with the introduction of many new With the development of automated weather station technologies, whether it be medical, mechanical, networks in the early 1980s, hourly values of temperaor Internet related, are promises; sometimes, too many ture, solar radiation, precipitation, relative humidity, promises are made about the potential capabilities of wind direction, and wind speed become avail...

Cover crops are usually planted between cash to protect the soil, take up residual soil nitrate, and release nitrogen (N) subsequent crops. Following cover crop termination, residues may remain on surface, where their decomposition is largely dependent residue temperature water potential (ψresidue). While it possible continuously measure temperature, continuous measurements of ψresidue impracti...