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Physical Sciences and Mathematics Commons

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Articles 1 - 10 of 10

Full-Text Articles in Physical Sciences and Mathematics

Landslides Of Nebraska, Duane A. Eversoll Aug 2013

Landslides Of Nebraska, Duane A. Eversoll

Conservation and Survey Division

No abstract provided.


Microbial Ecology, Nitrogen, And Nitrous Oxide Trends In Marginal Soils Used For Cellulosic Biofuel Production In Eastern Nebraska, Carla M. Ahlschwede Jul 2013

Microbial Ecology, Nitrogen, And Nitrous Oxide Trends In Marginal Soils Used For Cellulosic Biofuel Production In Eastern Nebraska, Carla M. Ahlschwede

School of Natural Resources: Dissertations, Theses, and Student Research

There is a growing demand for diverse biofuels in the United States. Potential feedstocks for cellulosic ethanol include corn (Zea mays, L.) stover and switchgrass (Panicum virgatum, L). Lands used to provide for corn production can provide some cellulosic feedstock through corn stover, but crop residue removal can have negative impacts on soil quality. Furthermore, arable land must supply both fuel and food. To meet both demands, lands considered marginal for row-crop production will likely be used to produce dedicated bioenergy crops such as switchgrass. Marginal lands are typically placed in conservation programs because they are prone …


Decomposition And Nutrient Release Of Different Cover Crops In Organic Farm Systems, Jianru Shi Jun 2013

Decomposition And Nutrient Release Of Different Cover Crops In Organic Farm Systems, Jianru Shi

School of Natural Resources: Dissertations, Theses, and Student Research

Cover crops act as green manure adding organic matter to agricultural-soils. For legume green manures to be an effective nitrogen (N) source for organic farming systems, their N release must be in synchrony with crop N demand. The objectives of this study were 1) determine the decomposition rates of three common cover crops (white clover, (Trifolium repens,L ) red clover (Trifolium pratense L.) and soybean (Glycine max L) in order to determine when most N was released and its synchrony with subsequent corn crop uptake; 2) we focused on the effect of cover crops on soil …


Preliminary Groundwater Level Changes At Selected Sites In Nebraska Following The Drought Of 2012, Aaron R. Young, Mark E. Burbach, Leslie M. Howard Apr 2013

Preliminary Groundwater Level Changes At Selected Sites In Nebraska Following The Drought Of 2012, Aaron R. Young, Mark E. Burbach, Leslie M. Howard

Conservation and Survey Division

No abstract provided.


Field Guide For Nebraska Invasive Insects, Nebraska Invasive Species Project Jan 2013

Field Guide For Nebraska Invasive Insects, Nebraska Invasive Species Project

Conservation and Survey Division

No abstract provided.


Three-Dimensional Hydrostratigraphy Of The Firth, Nebraska Area: Results From Helicopter Electromagnetic (Hem) Mapping In The Eastern Nebraska Water Resources Assessment (Enwra), Jesse T. Korus, R. Matthew Joeckel, Dana Divine Jan 2013

Three-Dimensional Hydrostratigraphy Of The Firth, Nebraska Area: Results From Helicopter Electromagnetic (Hem) Mapping In The Eastern Nebraska Water Resources Assessment (Enwra), Jesse T. Korus, R. Matthew Joeckel, Dana Divine

Conservation and Survey Division

No abstract provided.


Saturated Thickness Of The Unconfined Portions Of The High Plains Aquifer, Conservation And Survey Division Jan 2013

Saturated Thickness Of The Unconfined Portions Of The High Plains Aquifer, Conservation And Survey Division

Conservation and Survey Division

No abstract provided.


Groundwater-Level Changes In Nebraska - Spring 2012 To Spring 2013, A. Young, M. E. Burbach, L. M. Howard Jan 2013

Groundwater-Level Changes In Nebraska - Spring 2012 To Spring 2013, A. Young, M. E. Burbach, L. M. Howard

Conservation and Survey Division

No abstract provided.


Nebraska Statewide Groundwater-Level Monitoring Report 2013, A. R. Young, M. E. Burbach, L. M. Howard Jan 2013

Nebraska Statewide Groundwater-Level Monitoring Report 2013, A. R. Young, M. E. Burbach, L. M. Howard

Conservation and Survey Division

No abstract provided.


Three-Dimensional Hydrostratigrapy Of The Swedeburg, Nebraska Area: Results From Helicopter Electromagnetic (Hem) Mapping For The Eastern Nebraska Water Resources Assessment (Enwra), Dana Divine, Jesse T. Korus Jan 2013

Three-Dimensional Hydrostratigrapy Of The Swedeburg, Nebraska Area: Results From Helicopter Electromagnetic (Hem) Mapping For The Eastern Nebraska Water Resources Assessment (Enwra), Dana Divine, Jesse T. Korus

Conservation and Survey Division

No abstract provided.