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Full-Text Articles in Agriculture
Dust Emissions From Undisturbed And Disturbed, Crusted Playa Surfaces: Cattle Trampling Effect, Ed Frederickson, Teddy Zobeck, Matthew Baddock, Robert Van Pelt
Dust Emissions From Undisturbed And Disturbed, Crusted Playa Surfaces: Cattle Trampling Effect, Ed Frederickson, Teddy Zobeck, Matthew Baddock, Robert Van Pelt
Ed L. Frederickson
Dry playa lake beds can be a significant source of fine dust emissions during high wind events in arid and semiarid landscapes. The physical and chemical properties of the playa surface control the amount and properties of the dust emitted. In this study, we use a field wind tunnel to quantify the dust emissions from a bare, fine-textured playa surface located in the Chihuahua Desert at the Jornada Experimental Range, near Las Cruces, New Mexico, USA. We tested natural, undisturbed crusted surfaces and surfaces that had been subjected to two levels of domestic animal disturbance. The animal disturbance was provided …
A Retention Index Calculator Simplifies Identification Of Plant Volatile Organic Compounds, Ed Frederickson
A Retention Index Calculator Simplifies Identification Of Plant Volatile Organic Compounds, Ed Frederickson
Ed L. Frederickson
Plant volatiles (PVOCs) are important targets for studies in natural products, chemotaxonomy and biochemical ecology. The complexity of PVOC profiles often limits research to studies targeting only easily identified compounds. With the availability of mass spectral libraries and recent growth of retention index (RI) libraries, PVOC identification can be achieved using only gas chromatography coupled to mass spectrometry (GCMS). However, RI library searching is not typically automated, and until recently, RI libraries were both limited in scope and costly to obtain. Objective To automate RI calculation and lookup functions commonly utilised in PVOC analysis. Methodology Formulae required for calculating retention …
Grassland In The Borderlands: Understanding Coupled Natural Human Systems And Transboundary Conservation, Ed Frederickson, G. Ceballos, R. List, A. Davidson, Sierra Corona, L. Martinez, J.E. Herrick, J. Pacheco
Grassland In The Borderlands: Understanding Coupled Natural Human Systems And Transboundary Conservation, Ed Frederickson, G. Ceballos, R. List, A. Davidson, Sierra Corona, L. Martinez, J.E. Herrick, J. Pacheco
Ed L. Frederickson
As conservationists well know, political borders rarely coincide with natural ecological boundaries. International borders such as that between the United States and Mexico traverse numerous ecosystems and watersheds. Many species of animals, birds, and insects regularly migrate between habitats across international borders. Conservation of Shared Environments collects works that take on the environmental issues along the U.S.-Mexico border. Covering topics as diverse as wildlife preservation, grassland ecology, water rights, indigenous peoples, and the ecological consequences of border security, the contributors to this volume offer not only scientific analysis but also insight on how to bridge the gaps between scientists, policy …