Effects Of Crop Rotation And Nitrogen Fertilization On Soil Nitrate Concentration And Corn Yield

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Effects of Crop Rotation and Nitrogen Fertilization on Soil Nitrate Concentration and Corn Yield

Author : Enrique Ortiz-Torres
Publisher :
ISBN 13 :
Total Pages : 216 pages
Book Rating : 4.:/5 (166 download)

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Book Synopsis Effects of Crop Rotation and Nitrogen Fertilization on Soil Nitrate Concentration and Corn Yield by : Enrique Ortiz-Torres

Download or read book Effects of Crop Rotation and Nitrogen Fertilization on Soil Nitrate Concentration and Corn Yield written by Enrique Ortiz-Torres and published by . This book was released on 2006 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing concerns about production cost and environmental impacts of N fertilization require improving N management. The objectives of this study were to evaluate effects of cropping sequences and N fertilization on (1) corn yield and yield stability and (2) soil nitrate concentration in two Iowa long-term rotation experiments and (3) to assess the performance of the late spring nitrate test (LSNT) to assess N availability for corn in several cropping sequences. The experiments were near Kanawha (20 yrs) and Nashua (26 yrs) and N fertilization rates for corn were 0, 90, 180, 270 kg N ha−1. Rotations in Kanawha were continuous corn with spring N (Csp), continuous corn with fall N (Cfl), corn-corn-corn-oat, corn-soybean, corn-soybean-corn-oat, corn- corn-oat-alfalfa, and corn-oat-alfalfa-alfalfa. Rotations in Nashua were continuous corn, corn-soybean, corn-corn-soybean, corn-corn-corn-soybean, and corn-corn-oat-alfalfa. The results indicated that corn yield was higher and yield response to N was lower in the order corn after alfalfa > after soybean or oat undersown with alfalfa, and after alfalfa. There were no significant differences between response to N of continuous corn and second- or third-year corn after soybean. On average, N rates producing maximum observed net returns ranged from 270 kg N ha−1 for corn after corn to zero N for corn after alfalfa. On average, Csp yielded 8.7 % more than Cfl and the highest N rate used did not produce yield as high as those observed for corn in rotation. Corn yield across time was higher and more stable with N fertilization and when legumes were included in rotation. Observed maximum net returns to N increased over the time but the relative response to N fertilization did not change consistently. The highest soil nitrate concentrations were observed for corn after alfalfa and corn with N fertilization. Soil nitrate concentrations were higher for Csp than Cfl. Fertilization increased soil nitrate linearly for all corn crops and rates of increase were similar, except for smaller increases for Cfl and Csp. A certain nitrate concentration resulted in higher relative corn yield for corn after alfalfa. The results support guidelines for use of the LSNT test in Iowa.

Crop Rotation on Organic Farms

Author : Charles L. Mohler
Publisher : Natural Resource Agriculture and Engineering Service (Nraes)
ISBN 13 : 9781933395210
Total Pages : 156 pages
Book Rating : 4.3/5 (952 download)

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Book Synopsis Crop Rotation on Organic Farms by : Charles L. Mohler

Download or read book Crop Rotation on Organic Farms written by Charles L. Mohler and published by Natural Resource Agriculture and Engineering Service (Nraes). This book was released on 2009 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Agriculture and the Nitrogen Cycle

Author : Arvin Mosier
Publisher : Island Press
ISBN 13 : 1597267430
Total Pages : 320 pages
Book Rating : 4.5/5 (972 download)

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Book Synopsis Agriculture and the Nitrogen Cycle by : Arvin Mosier

Download or read book Agriculture and the Nitrogen Cycle written by Arvin Mosier and published by Island Press. This book was released on 2013-04-10 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen is an essential element for plant growth and development and a key agricultural input-but in excess it can lead to a host of problems for human and ecological health. Across the globe, distribution of fertilizer nitrogen is very uneven, with some areas subject to nitrogen pollution and others suffering from reduced soil fertility, diminished crop production, and other consequences of inadequate supply. Agriculture and the Nitrogen Cycle provides a global assessment of the role of nitrogen fertilizer in the nitrogen cycle. The focus of the book is regional, emphasizing the need to maintain food and fiber production while minimizing environmental impacts where fertilizer is abundant, and the need to enhance fertilizer utilization in systems where nitrogen is limited. The book is derived from a workshop held by the Scientific Committee on Problems of the Environment (SCOPE) in Kampala, Uganda, that brought together the world's leading scientists to examine and discuss the nitrogen cycle and related problems. It contains an overview chapter that summarizes the group's findings, four chapters on cross-cutting issues, and thirteen background chapters. The book offers a unique synthesis and provides an up-to-date, broad perspective on the issues of nitrogen fertilizer in food production and the interaction of nitrogen and the environment.

Journal of the American Society of Agronomy

Author :
Publisher :
ISBN 13 :
Total Pages : 326 pages
Book Rating : 4.0/5 (968 download)

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Book Synopsis Journal of the American Society of Agronomy by :

Download or read book Journal of the American Society of Agronomy written by and published by . This book was released on 1914 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Effects of Rotations, Fertilizers, Lime and Organic Matter on the Production of Corn, Wheat and Hay

Author : Thomas Kennerly Wolfe
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis The Effects of Rotations, Fertilizers, Lime and Organic Matter on the Production of Corn, Wheat and Hay by : Thomas Kennerly Wolfe

Download or read book The Effects of Rotations, Fertilizers, Lime and Organic Matter on the Production of Corn, Wheat and Hay written by Thomas Kennerly Wolfe and published by . This book was released on 1927 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Crop Rotation and Fertilization for Soil Improvement

Author : Robert Percival Bartholomew
Publisher :
ISBN 13 :
Total Pages : 96 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Crop Rotation and Fertilization for Soil Improvement by : Robert Percival Bartholomew

Download or read book Crop Rotation and Fertilization for Soil Improvement written by Robert Percival Bartholomew and published by . This book was released on 1950 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

A Study of the Value of Crop Rotation in Relation to Soil Productivity

Author : Wilbert Walter Weir
Publisher :
ISBN 13 :
Total Pages : 76 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis A Study of the Value of Crop Rotation in Relation to Soil Productivity by : Wilbert Walter Weir

Download or read book A Study of the Value of Crop Rotation in Relation to Soil Productivity written by Wilbert Walter Weir and published by . This book was released on 1926 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Root Zone Water Quality Model

Author : Lajpat Ahuja
Publisher : Water Resources Publication
ISBN 13 : 9781887201087
Total Pages : 388 pages
Book Rating : 4.2/5 (1 download)

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Book Synopsis Root Zone Water Quality Model by : Lajpat Ahuja

Download or read book Root Zone Water Quality Model written by Lajpat Ahuja and published by Water Resources Publication. This book was released on 2000 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication comes with computer software and presents a comprehensive simulation model designed to predict the hydrologic response, including potential for surface and groundwater contamination, of alternative crop-management systems. It simulates crop development and the movement of water, nutrients and pesticides over and through the root zone for a representative unit area of an agricultural field over multiple years. The model allows simulation of a wide spectrum of management practices and scenarios with special features such as the rapid transport of surface-applied chemicals through macropores to deeper depths and the preferential transport of chemicals within the soil matrix via mobile-immobile zones. The transfer of surface-applied chemicals (pesticides in particular) to runoff water is also an important component.

Effects of Crop Rotation and Nitrogen Fertilization on Corn Grain and Stover Production

Author : Kathy Ann Sperow
Publisher :
ISBN 13 :
Total Pages : 158 pages
Book Rating : 4.:/5 (991 download)

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Book Synopsis Effects of Crop Rotation and Nitrogen Fertilization on Corn Grain and Stover Production by : Kathy Ann Sperow

Download or read book Effects of Crop Rotation and Nitrogen Fertilization on Corn Grain and Stover Production written by Kathy Ann Sperow and published by . This book was released on 1983 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Effect of Nitrogen Fertilizer on Corn Yield and Soil Nitrates

Author :
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Effect of Nitrogen Fertilizer on Corn Yield and Soil Nitrates by :

Download or read book Effect of Nitrogen Fertilizer on Corn Yield and Soil Nitrates written by and published by . This book was released on 1978 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Crop Rotation and Soil Fertility

Author : Wilbur Louis Powers
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Crop Rotation and Soil Fertility by : Wilbur Louis Powers

Download or read book Crop Rotation and Soil Fertility written by Wilbur Louis Powers and published by . This book was released on 1923 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Residual Effects of Fall- and Spring-applied Nitrogen Fertilizers on Crop Yields in the Southeastern United States

Author : Robert W. Pearson
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.X/5 (3 download)

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Book Synopsis Residual Effects of Fall- and Spring-applied Nitrogen Fertilizers on Crop Yields in the Southeastern United States by : Robert W. Pearson

Download or read book Residual Effects of Fall- and Spring-applied Nitrogen Fertilizers on Crop Yields in the Southeastern United States written by Robert W. Pearson and published by . This book was released on 1961 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen fertilizer broadcast in November or December on widely different soils at seven locations in Alabama, Georgia, and Mississippi during 1955-59 was only 49 percent as effective as nitrogen fertilizer applied the following spring when measured by corn yields. In terms of nitrogen recovered, the relative effectiveness was 62 percent. There were no consistent differences among the five nitrogen sources applied in the fall as measured by corn yields, but nitrogen recovery tended to be lower from urea than from the other sources. Considerable residual effects of spring-applied nitrogen were found over a period of 16 months based on both yield and nitrogen uptake by the crops. Average uptakes of 25 and 34 pounds per acre of additional nitrogen were made by the second and third crops, respectively, from the 200-pound original application. This residual nitrogen produced average yield increases of 1,600 pounds of dry forage and 19 bushels of corn per acre. These results emphasize the economic importance of residual nitrogen and the need for soil test procedures for its estimation.

A Survey of Corn Yield Responses to Various Levels of Fertilization on Several Wisconsin Soils

Author : Ron Doersch
Publisher :
ISBN 13 :
Total Pages : 146 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis A Survey of Corn Yield Responses to Various Levels of Fertilization on Several Wisconsin Soils by : Ron Doersch

Download or read book A Survey of Corn Yield Responses to Various Levels of Fertilization on Several Wisconsin Soils written by Ron Doersch and published by . This book was released on 1961 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:

A Hitchhiker's Guide to Statistics in Plant Biology

Author : Stephen R. Bowley
Publisher : Guelph, Ont. : Any Old Subject Books
ISBN 13 : 9780968550014
Total Pages : 250 pages
Book Rating : 4.5/5 (5 download)

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Book Synopsis A Hitchhiker's Guide to Statistics in Plant Biology by : Stephen R. Bowley

Download or read book A Hitchhiker's Guide to Statistics in Plant Biology written by Stephen R. Bowley and published by Guelph, Ont. : Any Old Subject Books. This book was released on 1999-01-01 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Methods of Soil Enzymology

Author : Richard P. Dick
Publisher : John Wiley & Sons
ISBN 13 : 0891188541
Total Pages : 416 pages
Book Rating : 4.8/5 (911 download)

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Book Synopsis Methods of Soil Enzymology by : Richard P. Dick

Download or read book Methods of Soil Enzymology written by Richard P. Dick and published by John Wiley & Sons. This book was released on 2020-01-22 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methods of Soil Enzymology provides the first comprehensive set of vetted methods for studying enzymes in soils. Readers will especially benefit from the step-by-step explanation of the lab procedures, as well as background information for using these methods effectively and analyzing data. Main topics include activity assays, enzyme extraction, and synthetic enzyme complexes. Each method covered includes background informaton, step-by-step descriptions of the procedure, and special comments regarding nuances, pitfalls, and interpretation of the method. Learn the latest research methods, including enzyme extraction methods and procedures for creating synthetic enzyme complexes, as well as the newest ways to use small-scale and high-throughput methods for enzyme activity assays. Written for the researcher, but welcoming to those new to soil enzymology, the introduction includes conceptual information to orient those who are not familiar with these methods but want to use them. In the tradition of SSSA methods books, Methods of Soil Enzymology features a comprehensive approach with a focus on ease of use.

Effect of Fertilizer and Liming on Crops and Soils

Author : Theodore Eugene Odland
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Effect of Fertilizer and Liming on Crops and Soils by : Theodore Eugene Odland

Download or read book Effect of Fertilizer and Liming on Crops and Soils written by Theodore Eugene Odland and published by . This book was released on 1959 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Crop Evolution, Adaptation and Yield

Author : L. T. Evans
Publisher : Cambridge University Press
ISBN 13 : 9780521295581
Total Pages : 516 pages
Book Rating : 4.2/5 (955 download)

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Book Synopsis Crop Evolution, Adaptation and Yield by : L. T. Evans

Download or read book Crop Evolution, Adaptation and Yield written by L. T. Evans and published by Cambridge University Press. This book was released on 1996-05-02 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this major 1993 work, Lloyd Evans provides an integrated view of the domestication, adaptation and improvement of crop plants, bringing together genetic diversity, plant breeding, physiology and aspects of agronomy. Considerations of yield and maximum yield provide continuity throughout the book. Food, feed, fibre, fuel and pharmaceutical crops are all discussed. Cereals, grain legumes and root crops, both temperate and tropical, provide many of the examples, but pasture plants, oilseeds, leafy crops, fruit trees and others are also considered. After the introductory chapter, the increasing significance of crop yields to the world's food supply is highlighted. The next three chapters consider changes to crop plants over the last ten thousand years, including domestication, adaptation and improvement. Aimed at research workers and advanced students in crop physiology and ecology, agronomy and plant breeding, this book also reaches conclusions of relevance to those concerned with developmental policy, agricultural research and management, environmental quality, resource depletion and human history.