Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Frozen ground (3)
- Crops and soils (2)
- Fossils--Minnesota (2)
- Soil freezing (2)
- Soil temperature (2)
-
- Water (2)
- Agriculture (1)
- Alaska (1)
- Bacteria (1)
- Cropping systems (1)
- Earthworms (1)
- Fallowing (1)
- Forests and forestry (1)
- Fossils (1)
- Geology--United States (1)
- Glaciers (1)
- Glaciology (1)
- Hydrology (1)
- Minneapolis (Minn.) (1)
- Paleobotany--Silurian (1)
- Pipestone (Minn.) (1)
- Plants (1)
- Roots (Botany) Growth (1)
- Soil fertility (1)
- Soil management (1)
- Soils--Quality (1)
- Sustainable agriculture (1)
- Tillage (1)
- Toxicology (1)
- Water quality (1)
Articles 1 - 13 of 13
Full-Text Articles in Life Sciences
Biological Processes: Relationships Between Earthworms And Soil Temperature, Edwin C. Berry, Jerry K. Radke
Biological Processes: Relationships Between Earthworms And Soil Temperature, Edwin C. Berry, Jerry K. Radke
Journal of the Minnesota Academy of Science
Soil fauna play important roles in many soil processes and conditions which relate to agricultural systems. Earthworms are credited with enhancing soil fertility and soil physical properties by their feeding and burrowing activities. Most research on earthworms has focused on the warmer seasons of the year and relatively little is known about earthworm activity and survival during the portion of the year with frozen soils. Earthworms may survive winter by acclimatization, aestivation, or by burrowing to deeper depths where the soil is not frozen. More research is needed on the fate of earthworms in frozen soils. Suggested research areas include: …
Freezing And Thawing Of Agricultural Soils: Implications For Soil, Water, And Air Quality, Brenton S. Sharratt, Keith E. Saxton, Jerry K. Radke
Freezing And Thawing Of Agricultural Soils: Implications For Soil, Water, And Air Quality, Brenton S. Sharratt, Keith E. Saxton, Jerry K. Radke
Journal of the Minnesota Academy of Science
Most agricultural lands in the USA are subject to subfreezing temperatures. Soil freezing and thawing affects both biotic and abiotic interactions and processes which vary with weather, soil type, land management, and topography. Soil fauna generally undergo physiological changes or rely on locomotion as a means of adapting to frozen soils. Managing faunal populations using soil management may be achievable with a better understanding of winter ecological processes. Many of the thermal, hydraulic, mechanical, and physical properties of soils are altered by freezing and thawing. Soil erosion may be accentuated by soil freezing and thawing as a result of changes …
Frost Tillage For Soil Management In The Northeastern Usa, Harold M. Van Es, Robert R. Schindelbeck
Frost Tillage For Soil Management In The Northeastern Usa, Harold M. Van Es, Robert R. Schindelbeck
Journal of the Minnesota Academy of Science
Tillage during the winter is typically considered impossible, despite its desirability in some cases. Soil freezing results in net upward movement of water to the freezing zone which facilitates primary tillage or incorporation of amendments. these can be performed during a time window when the frost layer is sufficiently thin to be ripped and the underlying soil is tillable. We evaluated the feasibility of frost tillage and performed an agronomic comparison with spring-tilled soil. Soil conditions conductive to frost tillage occurred during three time windows in the 1991/1992 and two in the 1992/1993 winter at Ithaca, NY. Frost tillage resulted …
Overwinter Changes In Dry Aggregate Size Distribution Influencing Wind Erodibility In A Spring Wheat-Summerfallow Cropping System, Stephen D. Merrill, Alfred L. Black, Ted M. Zobeck
Overwinter Changes In Dry Aggregate Size Distribution Influencing Wind Erodibility In A Spring Wheat-Summerfallow Cropping System, Stephen D. Merrill, Alfred L. Black, Ted M. Zobeck
Journal of the Minnesota Academy of Science
A long-term study of the wind erodibility properties of a two-year spring wheat-summerfallow cropping systems was started in 1988 in south-central North Dakota as part of an USDA-ARS led effort to construct a process-oriented soil erosion predictive model. Observations were conducted on a conservation tillage experiment established in 1984 on soil classified in the U.S. as Typic-Pachic Haploborolls and in Canada as Brown to Dark Brown Chenozemic. The experiment included four residue-management treatments defined by targeted residue coverages: no-till, > 60% cover; minimal-till, 30% to 60% cover and undercutter dominated; conventional-till, < 30% cover and disk dominated; low-residue, < 5 % cover. Fall and spring measurements of dry aggregate size distribution (ASD) of surface soil (0 to 4 cm depth), and overwinter changes in ASD are reported here. A rotary sieve produced six size fractions ranging from < 0.42 mm to > 19.2 mm diameter. Measurements of ASD are expressed as geometric …
Frozen Soils: A Perspective On Past And Future Research For Promoting Sustainable Agricultural Systems, Jerry K. Radke, Brenton S. Sharratt, W. Doral Kemper, Dale A. Bucks
Frozen Soils: A Perspective On Past And Future Research For Promoting Sustainable Agricultural Systems, Jerry K. Radke, Brenton S. Sharratt, W. Doral Kemper, Dale A. Bucks
Journal of the Minnesota Academy of Science
Frozen soils impact many industries which rely· on soil, water, and .air resources in developing and manufacturing products. Most noteworthy is the agricultural industry in the northern United States where soils, which sustain food and fiber production, are subjected to frequent freezing and thawing. Soil freezing and thawing influences soil erodibility, surface and ground water quality, air quality, and biological activity. Many strides toward understanding frozen soil processes and managing lands to minimize the adverse effects of freezing and thawing have been made over the last two decades. Yet, further efforts to identify frozen soil processes which influence wind and …
Preliminary Report On Subtratum Temperature Studies On Root Growth, Stanley W. Oexemann
Preliminary Report On Subtratum Temperature Studies On Root Growth, Stanley W. Oexemann
Journal of the Minnesota Academy of Science
No abstract provided.
Forests And Glaciers Of Southern Alaska, William S. Cooper
Forests And Glaciers Of Southern Alaska, William S. Cooper
Journal of the Minnesota Academy of Science
No abstract provided.
The Range And Distribution Of The Lower Silurian Fauna Of Minnesota With Descriptions Of Some New Species, F. W. Sardeson
The Range And Distribution Of The Lower Silurian Fauna Of Minnesota With Descriptions Of Some New Species, F. W. Sardeson
Journal of the Minnesota Academy of Science
No abstract provided.
The Water Supply Of Minneapolis, James A. Dodge, C. L. Herrick, C. W. Hall
The Water Supply Of Minneapolis, James A. Dodge, C. L. Herrick, C. W. Hall
Journal of the Minnesota Academy of Science
No abstract provided.
Notice Of The Discovery Of Lingula And Paradoxides In The Red Quartzites Of Minnesota, N. H. Winchell
Notice Of The Discovery Of Lingula And Paradoxides In The Red Quartzites Of Minnesota, N. H. Winchell
Journal of the Minnesota Academy of Science
No abstract provided.
Some Notes Upon The More Recent Fossil Flora Of North Dakota And An Inquiry Into The Causes That Have Led To The Development Of The Treeless Areas Of The Northwest, John B. Leiberg
Journal of the Minnesota Academy of Science
No abstract provided.
Some Impurities In Drinking Water, George Weitbrecht
Some Impurities In Drinking Water, George Weitbrecht
Journal of the Minnesota Academy of Science
The more we know about the causes of disease the more we are convinced that many of the ills that flesh is heir to come to us through germs that are transmitted through the air we breath, the water we drink and the food we eat. You are all familiar with the westward march of cholera among men and epizooty among animals. In surgical operations the danger is not from the operation, but from germs which are in the air and which get into the body through the wound, producing surgical fever, etc. Since Lester used the carbolic acid spray …
Influence Of Geological Structure On History In The United States, A. F. Bechdolt
Influence Of Geological Structure On History In The United States, A. F. Bechdolt
Journal of the Minnesota Academy of Science
No abstract provided.