Date of Award

2017

Publisher

North Dakota State University

Document Type

Thesis

Degree Awarded

Master of Science (MS)

Program

Plant Sciences

Department

Plant Sciences

College

Agriculture, Food Systems and Natural Resources

Faculty Advisor

Kandel, Hans

Description

Soybean [Glycine max (L.) Merrill.] yields in North Dakota have not yet reached their genetic potential. Applying fertilizers may increase yields. This study was conducted to understand the impact of nitrogen (N) and sulfur (S) fertilization on soybean plant density, vigor, greenness, height, yield, test weight, protein and oil content, nodulation, vegetation, and root growth. Two varieties were planted in experiments across ten environments during 2015-2016. Yield differed between environments (up to 77%). Varieties responded differently to N and S fertilizer. Nitrogen (56 kg N ha-1) in the form of broadcast incorporated urea increased vigor (13%) and yield (3.6%) but decreased plant density (5.7%) and nodulation (from 31.8 to 23.7 nodules plant-1). Nitrogen application of 56 kg N ha-1 increased yield 118 kg ha-1 when averaged over all environments. Sulfur, in the form of broadcast incorporated gypsum, decreased protein concentration and increased early season nodule size.

Rights

NDSU policy 190.6.2

Rights Link

https://www.ndsu.edu/fileadmin/policy/190.pdf

Handle Identifier

https://hdl.handle.net/10365/28249

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