Download or read book The Potential Effects of Polyacrylamide PAM on an Experimental Agricultural Wetland written by Michael W. Swenson and published by . This book was released on 2004 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although the use of polyacrylamide (PAM) is widespread in agricultural settings, relatively little is known about the impacts of PAM on microbial communities. A limited amount of research has studied the effects of PAM on microbial communities in agricultural soils, but sediment and water microbial communities have been relatively neglected. This study examined the effects of PAM on sediment and water microcosms constructed from the sediment pond of a wetland designed to treat agricultural runoff. Microcosms were treated with PAM concentrations of 0ppm, l0ppm, 50ppm, and 100ppm. Treatment exposure was analyzed at 4, 6, 10, 12, 14, and 24 weeks. Analytic methods included sediment chemical analysis, redox determinations, sediment respiration rates, acridine orange direct counts (AODC), heterotrophic cell counts (plate count method), chlorophyll a analysis, community level physiological profiles (CLPP), and denaturing gradient gel electrophoresis (DGGE). Over time, PAM treatment increased heterotrophic counts in the sediment of weeks 14-24 PAM 100ppm microcosms, contributed to a change in dominance of Archaeal community members, and was associated with lower ammonium and carbon-to-nitrogen ratios. It seems, however, that PAM had little effect on the microbial activity of sediment-containing portions of the microcosms compared to the water column. Most of the microbial growth that increased due to PAM treatment was detected in the water column of the microcosms with increased heterotrophic colony counts, increased total cell counts, and increased Eh. All of these parameters were directly related to PAM concentration: As PAM concentration increased, so did the aforementioned measurements.

Download or read book Effects of Polyacrylamide on Rangeland Soils and Plants written by Saud Leily R. Al-Rowaily and published by . This book was released on 1992 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Potential Use of Polyacrylamide PAM in Australian Agriculture to Improve Off and On site Environmental Impacts and Infiltration Management written by R.E. Sojka and published by . This book was released on 2000 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of Polyacrylamide PAM Through Lay flay Polyethylene Tubing written by Jake McNeal and published by . This book was released on 2016 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyacrylamides (PAMs) are water-soluble, long-chain synthetic organic polymers that, when applied as a soil amendment, purportedly improves infiltration, decreases sediment and agrochemical transport, and improves crop yield. There is a paucity of data, however, on the effect of PAM applied through lay-flat polyethylene tubing on infiltration, erosion, agrochemical transport, and crop yield for Mid-South soils in furrow irrigated environments. The objective of this thesis was to compile and analyze PAM use in agricultural settings in the United States, and to conduct a 2 year field experiment to assess PAM effects on infiltration, erosion, N and P transport, and corn grain yield on a Dundee silt loam and a Forestdale silty clay loam soil located in Stoneville and Tribbett, Mississippi, respectively. Results indicate PAM has utility to improve infiltration and crop yield in Mid-South production systems, but effects on sediment and N and P transport will be variable and site specific.

Download or read book Impacts of Polyacrylamide pam Treatment on the Microbial Ecology and Nitrogen Cycling in Agricultural Soils written by William Aaron Smith and published by . This book was released on 2000 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agricultural Research written by and published by . This book was released on 2009 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polyacrylamide PAM and Soils written by Joe Makuch and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Soil and Water Conservation written by and published by . This book was released on 2006 with total page 674 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vol. 25, no. 1 contains the society's Lincoln Chapter's Resource conservation glossary.

Download or read book Agronomy Abstracts written by and published by . This book was released on 1992 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes abstracts of the annual meetings of the American Society of Agronomy; Soil Science Society of America; Crop Science Society of America ( - of its Agronomic Education Division).

Download or read book Water soluble Synthetic Polymers written by Philip Molyneux and published by . This book was released on 1983 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vertical Flow Constructed Wetlands written by Alexandros Stefanakis and published by Newnes. This book was released on 2014-06-26 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vertical flow constructed wetlands for wastewater and sludge treatment represent a relatively new and still growing technology. Vertical Flow Constructed Wetlands is the first book to present the state-of-the-art knowledge regarding vertical flow constructed wetlands theory and applications. In this book, you will learn about vertical flow systems with information about application and performance. Vertical Flow Constructed Wetlands also includes information on how different countries are applying the technology, with design guidelines to illustrate best practices worldwide. A focus on water conservation through reuse of treated water showcases the benefit of vertical flow construction, which has greatly increased the attractiveness of the technology in recent years. - All state-of-the-art knowledge regarding vertical flow constructed wetlands gathered in one book - A review of various constructed wetland approaches, including information about applications and performance, helps clarify what is currently known about constructed wetland principles and design - Discussion of how to manage the treated wastewater leaving the vertical flow for increasing biodiversity, providing food and habitat for birds, and producing harvestable biomass or crops - Includes case studies of constructed wetlands in developing countries

Download or read book Flexible Incentives for the Adoption of Environmental Technologies in Agriculture written by Frank Casey and published by Springer Science & Business Media. This book was released on 1999-08-31 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flexible Incentives for the Adoption of Environmental Technologies in Agriculture identifies and structures more flexible economic incentives for the achievement of environmental goals in agriculture. It provides a conceptual framework and presents case studies that analyze how flexible incentives can address environmental problems that are caused by agricultural production. The book brings together economists, agency personnel and political economists for the purpose of exploring how new cutting-edge economic tools could be developed and applied to environmental problems. The goal of the book is to complement and to expand the economic theory of environmental regulation and technology adoption with new research findings. The key theme of this book is the important role technology takes when addressing environmental problems. New technologies and technical development are broadly defined to include economic instruments, innovative ways to communicate environmental information, new economic institutions, and education. This book is designed for public and private policymakers, government analysts, teachers, researchers and students who specialize in the fields of natural resources, agricultural economics and environmental regulation. It provides a fresh perspective on what types of incentives may be used to lead us to the desired environmental outcomes and offers new ideas about the types of economic instruments that may achieve these outcomes.

Download or read book Developments in Soil Salinity Assessment and Reclamation written by Shabbir A. Shahid and published by Springer Science & Business Media. This book was released on 2013-01-15 with total page 827 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers assembled here cover topics such as technological advances in soil salinity mapping and monitoring, management and reclamation of salt-affected soils, use of marginal quality water for crop production, salt-tolerance mechanisms in plants, biosaline agriculture and agroforestry, microbiological interventions for marginal soils, opportunities and challenges in using marginal waters, and soil and water management in irrigated agriculture.

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2002 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Soils and Fertilizers written by and published by . This book was released on 1998-07 with total page 1294 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1999 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Common Grasses Legumes and Forbs of the Eastern United States written by A.Ozzie Abaye and published by Academic Press. This book was released on 2018-09-14 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Common Grasses, Legumes and Forbs of the Eastern United States: Identification and Adaptation presents photographic identification of the most important grassland, turf, and noncrop plants, and their seeds to facilitate quick identification in the field. Unlike many publications that focus solely on floral identification, this book emphasizes vegetative identification as well to allow for accurate plant identification year-round. The book includes 23 forage legumes, 61 grasses, and more than 100 nonleguminous forbs found in pastures and grasslands of Eastern United States. In addition to identification of important species, the book describes other key characteristics such as adaptation, favorable and unfavorable soil types, seasonal growth patterns, and toxicity. For plants harvested for hay or silage or by grazing, the book also discusses cutting and grazing management, quality factors, and potential yields. Through its practical approach and comprehensive structure, Common Grasses, Legumes and Forbs of the Eastern United States is a valuable reference for farm advisors, teachers and students of agronomy, and for anyone interested in the dynamic relationship between plants and agriculture. - Features full-color illustrations of both seed and plant, allowing for rapid identification at multiple stages of development - Presents various identification methods and use cases for over 180 plants - Details seasonal growth patterns and toxicity, as well as favorable and unfavorable soil types - Discusses cutting and grazing management