University of Maryland Extension

Ag Research Results

2019 - Soybean Planting Population

Description of Research
The current soybean planting population recommendation for full season soybeans in Maryland is 140,000 plants per acre (ppa). However, this recommendation is based on research conducted in the early 2000s on initial Roundup Ready® varieties in minimum tillage systems (Kratochvil, Pearce, & Harrison, Jr. 2004). Today, farmers have switched to no-till soybean production and have access to the second generation of Roundup Ready® soybeans as well as many newer varieties. While the recommended seeding rate provides adequate yield from these newer varieties, formal research has not been conducted in Maryland to determine if they can still yield at lower populations in no-till production.

Reference
Kratochvil, R.J., Pearce, J.T., & Harrison, Jr., M.R. (2004). Row-Spacing and Seeding Rate Effects on Glyphosate-Resistant Soybean for Mid-Atlantic Production Systems. Agron. J., 96, 1029-1038.

Results
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2019 - Weed Control in No-Till Pumpkins

Description of Research
Objective - Evaluate potential of Dual Magnum as an overlapping residual approach for pumpkin production throughout the Mid-Atlantic Region. This study was conducted at the Western Maryland Research & Education Center in Keedysville, MD, the Penn State Research & Education Center in Rock Springs, PA, and at the University of Delaware Research & Education Center in Georgetown, DE.

Results
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2019 - Potential Herbicides to Control Problem Weeds in Snap Beans

Description of Research
Objective - To evaluate herbicide effectiveness of these potential herbicides when used in combination with herbicides as compared to current standards. Also, to determine the effect of these herbicide treatments on snap bean stand, injury, and yield. This study is being conducted at the Western Maryland Research & Education Center in Keedysville, MD, the Penn State Research & Education Center in Rock Springs, PA, and at the University of Delaware Research & Education Center in Georgetown, DE. Data from only the Maryland site is included in this article.

Results
 
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