Drought significantly limits wheat productivity across the temporal and spatial domains. Unmanned Aerial Systems (UAS) has become an indispensable tool to collect refined high resolution imagery data. A 2-year field study was conducted in 2018 2019 determine effects of drought on canopy growth winter wheat. Weekly UAS data were collected using red, green, blue (RGB) multispectral (MS) sensors o...

Wilhelm, W.W., Schepers, J.S., Mielke, L.N., Doran, J.W., Ellis, J.R. and Stroup, W.W., 1987. Dryland maize development and yield resulting from tillage and nitrogen fertilization practices. Soil Tillage Res., 10: 167-179. Conservation tillage ( 7 30% residue cover) has proven to be very effective in reducing runoff and erosion and in increasing soil water storage. In dryland cropping situation...

We present evidence to show that DAYCENT can reliably simulate soil C levels, crop yields, and annual trace gas fluxes for various soils. DAYCENT was applied to compare the net greenhouse gas fluxes for soils under different land uses. To calculate net greenhouse gas flux we accounted for changes in soil organic C, the C equivalents of N2O emissions and CH4 uptake, and the CO2 costs of N fertil...

Tillage systems and nutrient management influence soil chemical properties that can impact the long-term sustainability of dryland production systems. This study was conducted to compare the effects of no-till (NT) and conventional till (CT) on the soil chemical properties and grain yield of a dryland winter wheat (Triticum aestivum L.)– grain sorghum [Sorghum bicolor (L.) Moench]/corn (Zea may...

In the Great Plains of North America potential evaporation exceeds precipitation during most months of the year. About 75% of the annual precipitation is received from April through September, and is accompanied by high temperatures and low relative humidity. Dryland agriculture in the Great Plains has depended on wheat production in a wheat-fallow agroecosystem (one crop year followed by a fal...

to study the effects of urea foliar spray at different plant growth stages on grain yield and protein percentage of two dryland wheat varieties of sardari and azar 2, an experiment was conducted in east mangor agricultural station of mahabad in 2007– 2008. the experiment design was split plot based on randomized complete block design with three replications. treatments were 50 gr×10 m-2 n as ur...

and DSSAT could be used to predict success or failure of soybean in dryland crop rotations. But for a crop The Root Zone Water Quality Model (RZWQM) and CROPmodel to be a valuable aid in predicting the effects, and GRO-Soybean simulate soybean [Glycine max (L.) Merr.] growth, success or failure, of intensifying and diversifying rotadevelopment, and yield. The models require calibration for soyb...