The Miocene macroflora of the northern Ogallala Group, northern Nebraska and southern South Dakota

1998 ◽  
Vol 72 (2) ◽  
pp. 388-397 ◽  
Author(s):  
Mark L. Gabel ◽  
Douglas C. Backlund ◽  
Jacob Haffner
Keyword(s):  
South Dakota ◽  
Great Plains ◽  
Late Miocene ◽  
Vascular Plants ◽  
Northern Great Plains ◽  
The South ◽  
Savanna Vegetation ◽  
Northern Portion

The results of the first comprehensive paleobotanical survey of the northern portion of the late Miocene Ogallala Group are discussed. Several species of fossilized fruiting structures from vascular plants (Berriochloa, Celtis, Cryptantha, Biorbia, Lithospermum, Eleofimbris, Carex, and Cyperocarpus) in the mid- to late-Miocene are reported. Fewer taxa (12 genera) were found in the South Dakota-northern Nebraska area than have been reported previously (20 genera) from southern Nebraska-Kansas strata in the same formations and approximately the same area of exposures. Sites of Barstovian age near the Kilgore Flora site indicate that grasses were commonly found in the region. The results presented here support the hypothesis that grassland savanna vegetation was widely distributed in the northern Great Plains by the Clarendonian age.

LATEST HOLOCENE AEOLIAN ACTIVITY IN THE WHITE RIVER BADLANDS DUNE FIELDS, SOUTH DAKOTA, NORTHERN GREAT PLAINS, USA

2020 ◽  
Author(s):  
Paul Baldauf ◽  
◽  
Gregory Baker ◽  
Patrick Burkhart ◽  
Allen Gontz ◽  
...  
Keyword(s):  
South Dakota ◽  
Great Plains ◽  
Northern Great Plains ◽  
White River ◽  
Aeolian Activity

scholarly journals First Report of Charcoal Rot of Sunflower in Minnesota, USA

2010 ◽  
Vol 11 (1) ◽  
pp. 48
Author(s):  
T. Gulya ◽  
A. Mengistu ◽  
K. Kinzer ◽  
N. Balbyshev ◽  
S. Markell
Keyword(s):  
United States ◽  
South Dakota ◽  
Great Plains ◽  
Northern Great Plains ◽  
Charcoal Rot ◽  
Midwestern United States ◽  
First Report ◽  
High Incidence ◽  
Sunflower Crop ◽  
North And South

Charcoal rot was first observed on sunflower in North and South Dakota in 1998, and was widespread on soybeans recently in Iowa, suggesting that Macrophomina may becoming more common in cooler growing areas of Midwestern United States. With the multitude of Macrophomina hosts in the northern Great Plains and the high incidence of microsclerotia we detected in soil, high disease potential may exist, suggesting that in drier, hotter years the sunflower crop may be affected by this disease. Accepted for publication 17 May 2010. Published 7 July 2010.

Ponderosa Pine Provenance Test for Windbreaks in Eastern South Dakota

1985 ◽  
Vol 2 (4) ◽  
pp. 105-107
Author(s):  
Peter R. Schaefer ◽  
Norman W. Baer
Keyword(s):  
South Dakota ◽  
Great Plains ◽  
Ponderosa Pine ◽  
Height Growth ◽  
Tree Planting ◽  
Northern Great Plains ◽  
South Central ◽  
Average Survival ◽  
Provenance Test ◽  
Genetically Improved

Abstract Ponderosa pine has been planted extensively in the northern Great Plains. Many of the plantings, however, have performed poorly or failed because of poor early survival and slow growth. A regional provenance test of 73 ponderosa pine sources was established in 1968 as one means of improving the performance of this species throughout the Great Plains. Results after 15 years indicated that three sources located in north central Nebraska and south central South Dakota were taller than all other sources. The three sources exhibited a height growth 30% above the plantation mean and an average survival 20% higher than that of the plantation as a whole. These sources have also been among the tallest and best survivors in similar tests throughout the Great Plains. Juvenile-mature correlations were strong for 5-year and 15-year height growth. The identification of a relatively small area from which to collect genetically improved ponderosa pine should greatly facilitate the incorporation of these seedlings into tree-planting efforts in the northern Plains. North. J. Appl. For. 2:105-107, Dec. 1985.

A 13-YEAR SURVEY OF THE APHIDOPHAGOUS COCCINELLIDAE IN MAIZE FIELDS IN EASTERN SOUTH DAKOTA

1990 ◽  
Vol 122 (3) ◽  
pp. 579-581 ◽  
Author(s):  
R.W. Kieckhefer ◽  
N.C. Elliott
Keyword(s):  
United States ◽  
Zea Mays ◽  
North America ◽  
South Dakota ◽  
Great Plains ◽  
The United States ◽  
Northern Great Plains ◽  
Eastern Canada

Coccinellids are a conspicuous group of aphidophagous predators in maize, Zea mays L., in the Northern Great Plains of the United States. Numerous studies have been conducted on the ecology of coccinellids in maize in North America (Ewert and Chiang 1966a, 1966b; Smith 1971; Foott 1973; Wright and Laing 1980; Corderre and Tourneur 1986; Corderre et al. 1987). However, there have been few long-term surveys of coccinellids in maize. Foott (1973) reported on the abundance of coccinellid species inhabiting maize in eastern Canada over a 4-year period; no surveys of this type have been reported for the Northern Great Plains. We sampled coccinellids in maize fields at three sites in eastern South Dakota for 13 consecutive years to determine the species inhabiting the crop and levels of variation in their abundances among sites and years.

Sign in / Sign up

Export Citation Format

Share Document