Continuous Dryland Cropping in the Great Plains: What Are the Limits?
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منابع مشابه
Runoff and Erosion Estimates for Great Plains Dryland Agroecosystems
Water is the most production limiting factor for dryland cropping systems in semiarid Great Plains environments. Evaporation is responsible for the greatest amount of water loss and management practices such as notill have been adopted to reduce evaporative losses. Less is known about the magnitude of water loss due to runoff. An objective of this study is to estimate an expected range in rainf...
متن کاملDryland soil chemical properties and crop yields affected by long-term tillage and cropping sequence
Information on the effect of long-term management on soil nutrients and chemical properties is scanty. We examined the 30-year effect of tillage frequency and cropping sequence combination on dryland soil Olsen-P, K, Ca, Mg, Na, SO4-S, and Zn concentrations, pH, electrical conductivity (EC), and cation exchange capacity (CEC) at the 0-120 cm depth and annualized crop yield in the northern Great...
متن کاملNITROGEN MANAGEMENT Nitrogen Fertilization and Rotation Effects on No-Till Dryland Wheat Production
and Reule, 1994; Norwood, 2000; Peterson et al., 1993; Schlegel et al., 2002). No-till (NT) production systems, especially winter wheat (Triticum Dhuyvetter et al. (1996) reported that the more intenaestivum L.)–summer crop–fallow, have increased in the central Great sive cropping systems had higher profit potential than Plains, but few N fertility studies have been conducted with these systems...
متن کاملTILLAGE AND CROPPING SYSTEMS Tillage System and Crop Rotation Effects on Dryland Crop Yields and Soil Carbon in the Central Great Plains
CT crop–fallow system in the central Great Plains (Shanahan et al., 1988; Halvorson, 1990; Peterson et al., Winter wheat (Triticum aestivum L.)–fallow (WF) using conven1993; Halvorson and Reule, 1994; Farahani et al., 1998). tional stubble mulch tillage (CT) is the predominant production practice in the central Great Plains and has resulted in high erosion potential Winter wheat yields in a WCF...
متن کاملEfficient Water Use in Dryland Cropping Systems in the Great Plains
those methods as they have been used from the Canadian Prairie Provinces to the southern Great Plains of Successful dryland crop production in the semiarid Great Plains the United States and the resultant effects on system of North America must make efficient use of precipitation that is often limited and erratic in spatial and temporal distribution. The purpose WUE. Additionally, differences i...
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تاریخ انتشار 2013