Crop rotation influences yield more than soil quality at a semiarid location
Khan, Qasim A.
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Winter wheat (Triticum aestivum L.) is often rotated with a fallow in semiarid regions to conserve soil moisture and minimize crop failures. We hypothesized that direct seed systems coupled with intensified and more diverse crop rotations would produce an equivalent or greater annualized grain yield than a traditional winter wheat–fallow (WF) system. Furthermore, continuous cropping would lead to an accumulation of greater soil carbon than the traditional WF. A 6-yr study was conducted to evaluate crop rotations, which included pea (Pisum sativum L.), lentil (Lens culinaris Medik), lentil as a cover crop, spring wheat, or camelina [Camelina sativa (L.) Crantz] in rotation with winter wheat in 2- and 3-yr rotations. The results of this study averaged over 6 yr showed that increased cropping intensity produced an annualized yield equal to that of WF, provided that either a fallow or a cover crop rather than another grain crop was present prior to winter wheat. The soil quality indices showed particulate organic matter (POM) increased with rotations with greater cropping intensity (1.00 vs. 0.67), although the POM of these rotations was not different from that of WF.
This is the peer reviewed version of the following article: [Crop rotation influences yield more than soil quality at a semiarid location. Agronomy Journal 114, 4 p2280-2289 (2022)], which has been published in final form at https://doi.org/10.1002/agj2.21097. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions: https://authorservices.wiley.com/author-resources/Journal-Authors/licensing/self-archiving.html#3.
McVay, K., & Khan, Q. A.(2022). Crop rotation influences yield more than soilquality at a semiarid location.Agronomy Journal,114,2280–2289.https://doi.org/10.1002/agj2.21097