Degree Type

Creative Component

Semester of Graduation

Fall 2020

Department

Agronomy

First Major Professor

Dr. Andrew Lenssen

Degree(s)

Master of Science (MS)

Major(s)

Agronomy

Abstract

Limited research has been done to determine if rolling soybeans [Glycine max (L.) Merr.] post emergence can break apical dominance and induce lateral branching to provide greater node and pod numbers. Increasing node and pod numbers may be a way to improving yield in soybean. The objective of this experiment was to determine if rolling soybeans post emergence could break apical dominance to induce lateral branching, increase the number of reproductive nodes, and improve yield. Field experiments were conducted in 2017 and 2018 using a randomized complete block design with five replications. Treatments consisted of a control that was not rolled, rolling pre-emergence, and rolling at the V2, V3, and V4 growth stages. Several measurements were taken to evaluate the impacts of rolling treatments compared to the non-rolled control. Collected data included counts of main stems and branches, node counts on main stems and branches, counts of reproductive nodes on main stems and branches, pod counts on main stems and branches, stand density, and grain yield. Results showed significant treatment effects for many of the parameters, and a rolling by year interaction for stand density. Significant differences in main stems between treatments indicate that rolling can result in the loss of the main stem, which may result in treatment differences for several other measured parameters. The effect of year on multiple measurements is a good indication that the environment also played an essential role in the development of yield components and ultimately yield.

Copyright Owner

Boyers, Nathaniel

File Format

PDF

Embargo Period (admin only)

7-16-2020

1

Included in

Agriculture Commons

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