Theses and Dissertations

ORCID

https://orcid.org/0009-0007-4889-3476

Advisor

Larson, Erick J.

Committee Member

Krutz, L. Jason

Committee Member

Maples, William E.

Committee Member

Lemus, Rocky W.

Date of Degree

8-13-2024

Original embargo terms

Immediate Worldwide Access

Document Type

Graduate Thesis - Open Access

Major

Plant & Soil Science (Agronomy)

Degree Name

Master of Science (M.S.)

College

College of Agriculture and Life Sciences

Department

Department of Plant and Soil Sciences

Abstract

Cover crops are known to produce many conservation benefits. However, grower adoption remains low due to various issues and poor economic returns. This study was conducted to identify factors and management practices needed to integrate cover crops into Midsouth corn production systems. The effects of cover crop species, herbicide termination timing, and mechanical termination methods on the growth, grain yields, and economic returns of corn [Zea Mays (L.)] were investigated in Mississippi. The presence of living cover crops at planting stunted corn growth when they were not terminated by herbicides at least four weeks preplant. A legume cover crop reduced corn yield only when it was terminated at planting. The inclusion of a legume benefited the system compared to cereal rye. Cover crops produced neutral to negative crop yields, and all treatments reduced economic returns. Negative economic returns and production risks will likely limit cover crop adoption by corn growers.

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