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29 Titles Match Your Query
Showing 1 through 29 of 29
1. Long-term Tillage and Crop Rotation Study, Nebraska [USDA.ARS.SWCRU.CropSysTrial2]
(adapted from Project Summary) PROBLEM: Soil and water conservation concerns have been and continue to be the major driving forces in agricultural production in the western Corn Belt. In addition, ...


2. Developing Rapid Instrumental Methods for Measurement of Soil Quality Parameters [USDA.ARS.NRI.ECL.RapidMeasure]
(adapted from project description) Problem: The need to assess impact of conventional and sustainable agricultural practices on soil quality requires development of routine procedures that can rapidly ...


3. Influence of Tillage Management on Soil Quality and Fate of Agricultural Nitrogen [USDA.ARS.NRI.ECL.TillMngt]
(adapted from project description) Problem: The use of no-tillage cropping systems has increased as their advantages in sustainable crop production have been documented. This includes better maintenance ...


4. Carbon, Nitrogen and Phosphorus Changes in CRP Lands [USDA.ARS.CGPRS.CNPcrp]
(adapted from abstract presented at ARS Carbon Storage Workshop, Jan 1999 Baltimore, MD) Problem: Marginal, highly erodible croplands have been taken out of production and replanted to grasslands ...


5. Satellite Estimates of Radiative Fluxes [GLCF_SERF]
The LBA activity is centered on observations and analyses in the Amazon that will improve information on: -Physical Climate -Carbon Storage and Exchange -Atmospheric ...


6. Mineralization of Organic Nitrogen in Soil Under Plow and No-tillage Management [USDA.ARS.NRI.ECL.MinOrgN]
(adapted from Project summary) Problem: Cultivation of soils has caused large decreases in content of soil organic matter and this has raised concerns about sustainble use of agricultural lands ...


7. Response of Crops to Free Air CO2 Enrichment (FACE) [USDA0532]
"Response of Crops to Free Air CO2 Enrichment (FACE)" is research that continues large cooperative experiments to determine the effects of CO2 supplied to the free air in an open agricultural field ...


8. Soil Organic Matter Dynamics in Dryland Cropping Systems in the Central Great Plains [USDA.ARS.CGPRS.OMDryland]
Problem: Soil organic matter (SOM) is important to hoid the soil together, eaSily ihfiitrate water, reduce compaction, and to provide nutrients such as N, P,K, S, and micronutrienis. However, the ...


9. Carbon Budgets, Agroforestry Ecosystems, and Global Climate Change in the Northern Great Plains [USDA0378]
The "Carbon Budgets, Agroforestry Ecosystems, and Global Climate Change in the Northern Great Plains" dataset establishes ecosystem carbon budgets toward the goal of maximizing carbon storage and ...


10. Carbon and Nitrogen Dynamics Response to Grazing Management [USDA0071]
Soil carbon and nitrogen parameters collected from soil samples from shortgrass native range pastures grazed under four grazing management schemes and replicate control areas (exclosures where no ...


11. Long-term Tillage and Cropping System Effects on Crop Yield and Soil Quality [USDA.ARS.CPCRC.CropSyst]
(adapted from Project Abstract) Problem: Many of the present cropping systems in the steeply-sloping Pacific Northwest dryland region are detrimental to soil quality because of excessive soil erosion ...


12. Tillage, N Fertilization, and Crop Rotation Effects On Soil Organic C and N [USDA.ARS.SPNRU.tillNCropOM]
(adapted from abstract presented at ARS carbon storage meeting, Baltimore Jan 1999) Problem: Conventional tillage, crop-fallow dryland fanning systems in the central and northern Great Plains utilized ...


13. Transport of Sediment-borne Carbon with Different Tillage Practices, USDA-ARS-NAEW [USDA.ARS.NAEWRU.SedimentC]
(adapted from project decription) Problems: Tillage practices impact the movement of sediment within and from watersheds. How do conservation tillage practices influence the movement of carbon attached ...


14. Carbon Exchange on the Short-grass Steppe and the Northern Mixed Prairie. [USDA.ARS.RRRU.Carbonxchng]
(adapted from project abstracts) Problems: While the importance of rangelands for domestic animal grazing and wildlife have been appreciated for some time, their role in the global C cycle is only ...


15. Carbon and Nitrogen Balance of a Northern Mixed-grass Prairie as Influenced by Grazing [USDA.ARS.RRRU.MixedGrassCarbon]
(Adapted from Abstract presented at ARS Carbon Storage Workshop, Baltimore, MD, Jan 1999) Problem: Rangeland health and sustainable productivity of our rangelands are becoming a key issues in developing ...


16. Partitioning of Carbon and Nitrogen in a Mixed-grass Prairie [USDA.ARS.CGPRS.CNmixedgrass]
(adapted from abstract presented at ARS Carbon Storage Workshop, Jan 1999, Baltimore MD) Problem: To further evaluate the effects of grazing on the C and N dynamics ofa rangeland ecosystem we needed ...


17. Alternative Tillage and Cropping Strategies for Subtropical Conditions [USDA.ARS.SARC.IFNRRU.AltTill]
(adapted from project summary) Problems: Subtropical growing conditions and the use of intensive plow tillage in South Texas promotes a net loss of soil carbon and plant nutrients. These losses ...


18. CO2 and Temperature Effects on Two Subtropical Grassland Species: A C3 Legume and C4 Stoloniferous Grass. [USDA.ARS.CGERU.CO2tempFlorida]
(Adapted from an Abstract Presented at ARS Carbon Storage Workshop) THE PROBLEM: After maximal deforestation in the Eastern USA, and particularly the Southeastern USA, much land returned naturally ...


19. Carbon Dioxide Fluxes for Native and Improved Grazinglands. [USDA.ARS.NGPRL.CO2FluxGraze]
(Adapted from abstract presented at ARS Carbon Storage Workshop, Baltimore, MD Jan 1999) PROBLEM: The grasslands ofthe Northern Great Plains are dominated by the C3 wheatgrass- needlegrass and C4 ...


20. Carbon Storage Related to Land Use Management: Analysis of Sediment Collected from Watersheds with Various Land Uses. [USDA.ARS.NAEW.CStoreLandMngt]
(adapted from project summary) Problems: Carbon in soils varies quantitatively and with depth depending on theland use management. Some management practices allow for considerable sequestration and ...


21. Green Manure Replacement for Fallow : Effect on Soil Organic Matter [USDA.ARS.NPARL.GreenManureOM]
Problem: Soil organic carbon levels have declined to about 50% of their original levels in much of the Northern Great Plains due to intensive tillage and a wheat - fallow rotation. Findings: A field ...


22. Long-term Tillage and Cropping Intensity Study :Effects on Organic Matter [USDA.ARS.NPARL.LongTermTillMT]
Problem: Soil organic matter levels have declined to about 50% oftheir original values where wheat/fallow rotations have been practiced using intensive tillage in the Northern Great Plains. Findings: ...


23. Impact of Livestock Grazing on Carbon and Nitrogen Balance of a Short-grass Steppe [USDA.ARS.CGPRS.SGSgraze]
(adapted from project abstract) Problem: Grazing lands constitute about 55% ofthe total land surface of the United States, and have been estimated to contain 40,000 MMT of C in the top 2 m of the ...


24. Impacts of CO2 Enrichment on C Sequestration in Native Grasslands [USDA.ARS.SPNRU.CO2enrich]
(Adapted from abstract presented at ARS Carbon Storage Workshop, Baltimore MD, Jan 1999) Problems: During the past few decades the atmospheric concentration of CO2 has been increasing at historically ...


25. Soil C Sequestration Under Varving Tillage and Cropping Management Systems: Cropping Systems Trial, Mead, Nebraska [USDA.ARS.SWCRU.CropSysTrial]
(adapted from Project Summary) PROBLEM: Soil and crop management research has emphasized the divide and conquer approach to solving problems in the past thirty years. More recently, emphasis on ...


26. Vegetation Change on Rangelands in Relation to Carbon Sequestration and Increasing Atmospheric CO2 Concentrations. [USDA.ARS.GSWRL.VegChngRangCO2]
(Adapted from project description) Problem: A large carbon sink is implied on western rangelands from data and modeling recently reported in Science. Only forest ecosystems have been generally ...


27. Farming Systems for Soil Quality and Economic Sustainability [USDA.ARS.NSDL.FarmSyst]
1. Climatic conditions in subtropical and warm temperate regions make it difficult to increase soil carbon storage, given current cropping practices coupled with the use of conventional tillage. ...


28. Residue Decomposition Processes and Soil C Storage in Agro-Ecosystems [USDA.ARS.GSWRL.ResidueDecomp]
(Adapted from Abstract presented at ARS Carbon Storage Workshop, Baltimore, MD, Jan 1999) Problems: The combined impact of population increases, industrial expansion, and deforestation has resulted ...


29. Carbon Storage in the 'Old Rotation 'Long-Term Cotton Experiment [USDA.ARS.NSDL.LongTermCotton]
(Adapted from project abstract) PROBLEMS: 1. Conventional tillage continuous cotton production severely depletes soil carbon and degrades the soil. 2. There is a paucity of data related to long-term ...


Showing 1 through 29 of 29
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