Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 7 of 7
Full-Text Articles in Entire DC Network
Northeast Research Station Watertown, South Dakota Annual Progress Report, 2008, Agricultural Experiment Station, Plant Science Department
Northeast Research Station Watertown, South Dakota Annual Progress Report, 2008, Agricultural Experiment Station, Plant Science Department
Agricultural Experiment Station and Research Farm Annual Reports
This is the 2008 annual progress report for the Northeast Research Station in Watertown, South Dakota. This report is issued by the South Dakota Agricultural Experiment Station and the South Dakota State University Plant Science Department. This report includes weather data, yield comparisons, crop performance trials, corn trials, soybean trials, winter wheat performance testing, Barley Foliar information, weed and pest control, herbicide demonstrations, canola and flax variety trials and more.
Early Season Weed Suppression In Buckwheat Using Clopyralid, Ona Sakaliene, Sharon A. Clay, William C. Koskinen, Gediminas Almantas
Early Season Weed Suppression In Buckwheat Using Clopyralid, Ona Sakaliene, Sharon A. Clay, William C. Koskinen, Gediminas Almantas
Agronomy, Horticulture and Plant Science Faculty Publications
Currently there are no herbicides registered for direct application to buckwheat for broadleaf weed control. This 4-yr Lithuanian study examined weed control using several rates of clopyralid alone or combined with a single rate of desmedipham. Most applications were applied at the 1-leaf stage of crop growth, however, one rate of clopyralid was applied pre-emergence (PRE) in 2 of the 4 yr. Buckwheat injury was evident within a few days after application (or emergence) with all treatments, but by harvest, no symptoms were evident. In the 2 yr with greatest weed densities, densities were reduced with increasing clopyralid rates alone …
Seed Predators Of Canada Milk-Vetch And Their Parasitoids, Arvid Boe, Paul J. Johnson
Seed Predators Of Canada Milk-Vetch And Their Parasitoids, Arvid Boe, Paul J. Johnson
Native Plant Focused Publications
Canada milk-vetch (Astragalus canadensis L.), North America’s most widespread species of Astragalus, is important for herbivores and granivores in natural ecosystems but suffers heavy seed losses to bruchids and curculionids. Our objectives were: (1) compile a species inventory and describe life histories of insects associated with seed production in Canada milk-vetch, and (2) determine frequencies of pod predation and primary parasitism in Canada milk-vetch. The seed predators were Acanthoscelides perforatus (Horn) and Tychius liljebladi Blatchley. Frequency of pod predation varied between two plant populations (46 and 70%) and between A. perforatus (37 %) and T. liljebladi (21 %). The primary …
Seed Predation By Acanthoscelides Submuticus And A. Pallidipennis (Coleoptera: Bruchidae) In False Indigo In The Northern Great Plains, Arvid Boe, Paul J. Johnson
Seed Predation By Acanthoscelides Submuticus And A. Pallidipennis (Coleoptera: Bruchidae) In False Indigo In The Northern Great Plains, Arvid Boe, Paul J. Johnson
Native Plant Focused Publications
False indigo (Amorpha fruticosa L.) is a native North American leguminous shrub frequently found on shores of lakes and banks of rivers and streams in eastern and central United States and is present in 46 of the 48 contiguous states. It is planted for wildlife habitat, streambank erosion control, and ornamental purposes. Over several years, 16 collections of mature pods of false indigo were obtained from shorelines of four lakes and one cultivated planting in the northern Great Plains to determine frequency of pod predation by bruchid beetles. Frequency of pod predation by Acanthoscelides submuticus (Sharp) varied significantly among locations, …
What Limits Fire? An Examination Of Driver's Of Burnt Area In Southern Africa, Sally Archibald, David P. Roy, Brian W. Van Wilgen, Robert J. Scholes
What Limits Fire? An Examination Of Driver's Of Burnt Area In Southern Africa, Sally Archibald, David P. Roy, Brian W. Van Wilgen, Robert J. Scholes
GSCE Faculty Publications
The factors controlling the extent of fire in Africa south of the equator were investigated using moderate resolution (500 m) satellite-derived burned area maps and spatial data on the environmental factors thought to affect burnt area. A random forest regression tree procedure was used to determine the relative importance of each factor in explaining the burned area fraction and to address hypotheses concerned with human and climatic influences on the drivers of burnt area. The model explained 68% of the variance in burnt area. Tree cover, rainfall in the previous 2 years, and rainfall seasonality were the most important predictors. …
Do Synergistic Relationships Between Nitrogen And Water Influence The Ability Of Corn To Use Nitrogen Derived From Fertilizer And Soil?, Ki-In Kim, David E. Clay, C. G. Carlson, S. A. Clay, T Trooien
Do Synergistic Relationships Between Nitrogen And Water Influence The Ability Of Corn To Use Nitrogen Derived From Fertilizer And Soil?, Ki-In Kim, David E. Clay, C. G. Carlson, S. A. Clay, T Trooien
Agronomy, Horticulture and Plant Science Faculty Publications
To improve site-specific N recommendations a more complete understanding of the mechanisms responsible for synergistic relationships between N and water is needed. Th e objective of this research was to determine the influence of soil water regime on the ability of corn (Zea mays L.) to use N derived from fertilizer and soil. A randomized split-block experiment was conducted in 2002, 2003, and 2004. Soil at the site was a Brandt silty clay loam (fine-silty, mixed, superactive frigid Calcic Hapludoll). Blocks were split into moderate (natural rainfall) and high (natural + supplemental irrigation) water regimes. Nitrogen rates were 0, 56, …
Early Season Weed Suppression In Buckwheat Using Clopyralid, Ona Sakaliene, Sharon A. Clay, William C. Koskinen, Gediminas Almantas
Early Season Weed Suppression In Buckwheat Using Clopyralid, Ona Sakaliene, Sharon A. Clay, William C. Koskinen, Gediminas Almantas
Agronomy, Horticulture and Plant Science Faculty Publications
Currently there are no herbicides registered for direct application to buckwheat for broadleaf weed control. This 4-yr Lithuanian study examined weed control using several rates of clopyralid alone or combined with a single rate of desmedipham. Most applications were applied at the 1-leaf stage of crop growth, however, one rate of clopyralid was applied pre-emergence (PRE) in 2 of the 4 yr. Buckwheat injury was evident within a few days after application (or emergence) with all treatments, but by harvest, no symptoms were evident. In the 2 yr with greatest weed densities, densities were reduced with increasing clopyralid rates alone …