scholarly journals Trends in Twentieth-Century U.S. Snowfall Using a Quality-Controlled Dataset

2009 ◽  
Vol 26 (1) ◽  
pp. 33-44 ◽  
Author(s):  
Kenneth E. Kunkel ◽  
Michael Palecki ◽  
Leslie Ensor ◽  
Kenneth G. Hubbard ◽  
David Robinson ◽  
...  
Keyword(s):  
Atlantic Coast ◽  
Missouri River ◽  
Ohio Valley ◽  
North Central ◽  
Climate Research ◽  
The North ◽  
Lake Effect ◽  
Central United States

Abstract A quality assessment of daily manual snowfall data has been undertaken for all U.S. long-term stations and their suitability for climate research. The assessment utilized expert judgment on the quality of each station. Through this process, the authors have identified a set of stations believed to be suitable for analysis of trends. Since the 1920s, snowfall has been declining in the West and the mid-Atlantic coast. In some places during recent years the decline has been more precipitous, strongly trending downward along the southern margins of the seasonal snow region, the southern Missouri River basin, and parts of the Northeast. Snowfall has been increasing since the 1920s in the lee of the Rocky Mountains, the Great Lakes–northern Ohio Valley, and parts of the north-central United States. These areas that are in opposition to the overall pattern of declining snowfall seem to be associated with specific dynamical processes, such as upslope snow and lake-effect snow that may be responding to changes in atmospheric circulation.

scholarly journals Biology and Economics of Recommendations for Insecticide-Based Management of Soybean Aphid

2016 ◽  
Vol 17 (4) ◽  
pp. 265-269 ◽  
Author(s):  
Robert L. Koch ◽  
Bruce D. Potter ◽  
Phillip A. Glogoza ◽  
Erin W. Hodgson ◽  
Christian H. Krupke ◽  
...  
Keyword(s):  
Insect Pest ◽  
Soybean Aphid ◽  
North Central ◽  
The North ◽  
Central United States ◽  
Glycine Max L ◽  
Short And Long Term ◽  
Aphis Glycines Matsumura

Soybean aphid, Aphis glycines Matsumura, remains the key insect pest of soybean, Glycine max (L.) Merrill, in the north-central United States. Management of this pest has relied primarily on scouting and application of foliar insecticides based on an economic threshold (ET) of 250 aphids per plant. This review explains why this ET remains valid for soybean aphid management, despite changes in crop value and input costs. In particular, we review how soybean aphid impacts soybean yield, the role of biology and economics in recommendations for soybean aphid management, and the short- and long-term consequences of inappropriately timed insecticide applications. Accepted for publication 13 December 2016.

Drought Effects on Yield and Quality of Perennial Grasses in the North Central United States

jpa ◽  
1992 ◽  
Vol 5 (4) ◽  
pp. 556-561 ◽  
Author(s):  
C. C. Sheaffer ◽  
P. R. Peterson ◽  
M. H. Hall ◽  
J. B. Stordahl
Keyword(s):  
United States ◽  
Perennial Grasses ◽  
North Central ◽  
The North ◽  
Yield And Quality ◽  
Central United States ◽  
Drought Effects

scholarly journals Simulated long term temperature and dissolved oxygen characteristics of lakes in the north-central United States and associated fish habitat limits

1996 ◽  
Vol 41 (5) ◽  
pp. 1124-1135 ◽  
Author(s):  
H. G. Stefan ◽  
M. Hondzo ◽  
X. Fang ◽  
J. G. Eaton ◽  
J. H. McCormick
Keyword(s):  
United States ◽  
Dissolved Oxygen ◽  
Fish Habitat ◽  
North Central ◽  
The North ◽  
Central United States

scholarly journals Genetic Variation of Sclerotinia sclerotiorum from Multiple Crops in the North Central United States

PLoS ONE ◽  
2015 ◽  
Vol 10 (9) ◽  
pp. e0139188 ◽  
Author(s):  
Laura Aldrich-Wolfe ◽  
Steven Travers ◽  
Berlin D. Nelson
Keyword(s):  
United States ◽  
Genetic Variation ◽  
Sclerotinia Sclerotiorum ◽  
North Central ◽  
The North ◽  
Central United States

The Sydney Cyprus Survey Project: An Interdisciplinary Investigation of Long-Term Change in the North Central Troodos, Cyprus

1999 ◽  
Vol 26 (1) ◽  
pp. 19 ◽  
Author(s):  
Michael Given ◽  
A. Bernard Knapp ◽  
Nathan Meyer ◽  
Timothy E. Gregory ◽  
Vasiliki Kassianidou ◽  
...  
Keyword(s):  
North Central ◽  
The North ◽  
Term Change

Trauma injury, severity, and outcomes among pediatric American Indian/Alaska Natives in the North Central United States

2021 ◽  
Author(s):  
Raelene D. Zospah ◽  
Danelle Staebler ◽  
Leah Hustad ◽  
Johanna Askegard-Giesmann ◽  
Jagila Minso
Keyword(s):  
United States ◽  
American Indian ◽  
Injury Severity ◽  
Alaska Natives ◽  
North Central ◽  
The North ◽  
Central United States ◽  
Trauma Injury

Relation of algal biovolume to chlorophyll a in selected lakes and wetlands in the north-central United States

1995 ◽  
Vol 52 (2) ◽  
pp. 416-424 ◽  
Author(s):  
James W. LaBaugh
Keyword(s):  
United States ◽  
North Dakota ◽  
Chlorophyll A ◽  
Linear Relation ◽  
Algal Biomass ◽  
Open Water ◽  
Light Penetration ◽  
North Central ◽  
The North ◽  
Central United States

Algal chlorophyll a is commonly used as a surrogate for algal biomass. Data from three lakes in western Nebraska, five wetlands in north-central North Dakota, and two lakes in north-central Minnesota represented a range in algal biovolume of over four orders of magnitude and a range in chlorophyll a from less than 1 to 380 mg∙m−3. Analysis of these data revealed that there was a linear relation, log10 algal biovolume = 5.99 + 0.09 chlorophyll a (r2 = 0.72), for cases in which median values of chlorophyll a for open-water periods were less than 20 mg∙m−3. There was no linear relation in cases in which median chlorophyll a concentrations were larger than 20 mg∙m−3 for open-water periods, an occurrence found only in shallow prairies lakes and wetlands for years in which light penetration was the least.

Enhanced Biodegradation of Herbicides in Soil and Effects on Weed Control

1987 ◽  
Vol 1 (4) ◽  
pp. 341-349 ◽  
Author(s):  
R. Gordon Harvey ◽  
J. H. Dekker ◽  
Richard S. Fawcett ◽  
Fred W. Roeth ◽  
Robert G. Wilson
Keyword(s):  
Weed Species ◽  
North Central ◽  
Herbicide Degradation ◽  
Proso Millet ◽  
The North ◽  
Central United States ◽  
Enhanced Biodegradation ◽  
Long Time ◽  
Previously Treated ◽  
Repeated Use

Research conducted since 1979 in the north central United States and southern Canada demonstrated that after repeated annual applications of the same thiocarbamate herbicide to the same field, control of some difficult-to-control weed species was reduced. Laboratory studies of herbicide degradation in soils from these fields indicated that these performance failures were due to more rapid or “enhanced” biodegradation of the thiocarbamate herbicides after repeated use with a shorter period during which effective herbicide levels remained in the soils. Weeds such as wild proso millet [Panicum miliaceumL. spp.ruderale(Kitagawa) Tzevelev. #3PANMI] and shattercane [Sorghum bicolor(L.) Moench. # SORVU] which germinate over long time periods were most likely to escape these herbicides after repeated use. Adding dietholate (O,O-diethylO-phenyl phosphorothioate) to EPTC (S-ethyl dipropyl carbamothioate) reduced problems caused by enhanced EPTC biodegradation in soils treated previously with EPTC alone but not in soils previously treated with EPTC plus dietholate. While previous use of other thiocarbamate herbicides frequently enhanced biodegradation of EPTC or butylate [S-ethyl bis(2-methylpropyl)carbamothioate], previous use of other classes of herbicides or the insecticide carbofuran (2,3 -dihydro-2,2 -dimethyl-7-benzofuranyl methylcarbamate) did not. Enhanced biodegradation of herbicides other than the thiocarbamates was not observed.

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