Date of Graduation


Document Type


Degree Name

Master of Science in Agricultural Economics (MS)

Degree Level



Agricultural Economics and Agribusiness


Michael P. Popp

Committee Member

Lawton L. Nalley

Second Committee Member

Larry C. Purcell


Social sciences, Biological sciences, Glyphosate resistance, Maturity group, Nitrogen fixation, Plant density, Soybeans


This thesis is divided into four chapters. Chapter I introduces the rationale behind the study and gives a brief overview of the overall study covering weed control, irrigation needs and nitrogen fixation amounts across soybean maturity group. Chapter II will go into further detail outlining the first applied experiment dealing with weed control and irrigation issues. Alternative weed control methods are analyzed in conjunction with irrigation risk analysis across soybean maturity group in response to agricultural issues of glyphosate resistance and declining ground water supply in the Arkansas delta region. Chapter III will jointly examine irrigation application amounts and nitrogen fixation amounts across soybean maturity group to establish tradeoffs of yield impacts from irrigation while trying to address greenhouse gas emissions stemming from agricultural production. Chapter IV offers concluding notes, study limitations and suggests areas of further research.