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Author : Benedict Juliano
Publisher :
ISBN 13 :
Total Pages : 350 pages
Book Rating : 4.:/5 (373 download)
Download or read book Factors Affecting Nitrogen Management Practices of Corn Producers in Nebraska written by Benedict Juliano and published by . This book was released on 1997 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Samantha L. Teten
Publisher :
ISBN 13 :
Total Pages : 136 pages
Book Rating : 4.:/5 (126 download)
Download or read book Sensor-based Nitrogen Management on Non-irrigated Corn Based Systems in Nebraska written by Samantha L. Teten and published by . This book was released on 2021 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optimizing nitrogen (N) fertilizer applications in corn to reduce environmental impacts while maintaining producer profitability remains a challenge due to spatial and temporal variability in crop yield potential and soil N dynamics. In response to these challenges, active crop canopy sensors and imagery systems have been studied to test the performance of vegetative index-based N management, but adoption has been low. There is also a lack of field-scale research evaluating this technology in water-limiting environments. The evaluation of two sensor-based N management techniques was completed at nine non-irrigated sites in Eastern Nebraska. The first sensor-based N management technique evaluated an active crop canopy sensor and Holland-Schepers model to direct real-time, in-season N applications on corn. Compared to growers' management, active sensor management improved N use efficiency (NUE) by 16.8±8.4 kg grain kg N-1 and reduced N fertilizer inputs by 38.7±20.8 kg N ha-1 . All sites resulted in less N applied than the growers' management. Two of the nine sites resulted in significant yield losses compared to the sensor-based management with an average yield loss across all sites of 0.49±0.69 Mg grain ha-1 . Average partial profitability was $2.40±15.48 US$ ha-1 less than the growers' practices. Early season base N rates and timing influenced the NUE of active sensor N management approach. The second sensor-based management technique utilized aerial imagery and the Holland-Schepers model to develop variable-rate N prescriptions for in-season applications. The approach incorporated sub-field yield potential by varying the estimated optimum N rate used in the algorithm based on management zones (MZ). The aerial imagery-based management improved NUE compared to the growers' current management by 23.6±15.3 kg grain kg N-1 and did not result in differences in partial profit. The integration of MZs influenced the total N applied and demonstrated the potential to improve imagery-based recommendations using spatial field data. Overall, compared to grower management, active sensors improved NUE in nonirrigated sites where rainfall is a yield limiting factor. Aerial imagery-based prescriptions also improved NUE compared to grower management and provided an opportunity to further refine sensor-based management to account for sub-field variability by incorporating yield potential and soil attributes.
Author : L. T. Evans
Publisher : Cambridge University Press
ISBN 13 : 9780521295581
Total Pages : 516 pages
Book Rating : 4.2/5 (955 download)
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.
Author : R.F. Follett
Publisher : Gulf Professional Publishing
ISBN 13 : 0080537561
Total Pages : 539 pages
Book Rating : 4.0/5 (85 download)
Download or read book Nitrogen in the Environment: Sources, Problems and Management written by R.F. Follett and published by Gulf Professional Publishing. This book was released on 2001-12-03 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen in the Environment: Sources, Problems, and Management is the first volume to provide a holistic perspective and comprehensive treatment of nitrogen from field, to ecosystem, to treatment of urban and rural drinking water supplies, while also including a historical overview, human health impacts and policy considerations. It provides a worldwide perspective on nitrogen and agriculture. Nitrogen is one of the most critical elements required in agricultural systems for the production of crops for feed, food and fiber. The ever-increasing world population requires increasing use of nitrogen in agriculture to supply human needs for dietary protein. Worldwide demand for nitrogen will increase as a direct response to increasing population. Strategies and perspectives are considered to improve nitrogen-use efficiency. Issues of nitrogen in crop and human nutrition, and transport and transformations along the continuum from farm field to ground water, watersheds, streams, rivers, and coastal marine environments are discussed. Described are aerial transport of nitrogen from livestock and agricultural systems and the potential for deposition and impacts. The current status of nitrogen in the environment in selected terrestrial and coastal environments and crop and forest ecosystems and development of emerging technologies to minimize nitrogen impacts on the environment are addressed. The nitrogen cycle provides a framework for assessing broad scale or even global strategies to improve nitrogen use efficiency. Growing human populations are the driving force that requires increased nitrogen inputs. These increasing inputs into the food-production system directly result in increased livestock and human-excretory nitrogen contribution into the environment. The scope of this book is diverse, covering a range of topics and issues from furthering our understanding of nitrogen in the environment to policy considerations at both farm and national scales.
Author : Maria Emily Ouano Arnaiz
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.3/5 (129 download)
Download or read book Environmental Attitude and Its Effect on Growers' Nitrogen Management Practices written by Maria Emily Ouano Arnaiz and published by . This book was released on 1991 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Arvin Mosier
Publisher : Island Press
ISBN 13 : 1597267430
Total Pages : 320 pages
Book Rating : 4.5/5 (972 download)
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.
Author : Catharine Elizabeth Weber
Publisher :
ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.:/5 (917 download)
Download or read book Adoption of Nitrogen Efficient Eco-innovations by United States Corn Farmers written by Catharine Elizabeth Weber and published by . This book was released on 2014 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anthropogenically introduced nitrogen has compromised environmental quality, but is an essential element for crop production, particularly corn production. Increasing nitrogen use efficiency by adopting eco-innovations such as nitrogen soil testing, plant tissue testing and nitrogen transformation inhibitors can ameliorate this problem. Data from the 2010 USDA Agricultural Resource Management Survey of corn producers was used to examine the factors affecting adoption of these practices. Twenty-one percent of the 1840 corn farmers had adopted nitrogen soil testing, three percent had adopted plant tissue testing and ten percent had adopted nitrogen inhibitors. A multivariate probit regression found significant results for each category of explanatory variable that was examined. Older farmers were less likely to adopt nitrogen soil testing and nitrogen inhibitors. Farmers who did not obtain external nitrogen recommendations were less likely to adopt all three practices than farmers who received recommendations from a crop consultant. Those who received recommendations from fertilizer dealers were less likely to adopt nitrogen soil testing. Those who indicated that high prices influenced their decision to plant corn on that field were more likely to adopt plant tissue testing but less likely to adopt the other two practices. All regions were more likely to adopt nitrogen soil testing than the Midwest. Those who adopted conservation tillage were more likely to adopt nitrogen inhibitors and those who received conservation payments were more likely to adopt nitrogen soil testing and plant tissue testing. Adoption was also associated with the adoption of several other technologies.
Author : Nand Kumar Fageria
Publisher : CRC Press
ISBN 13 : 1482222833
Total Pages : 440 pages
Book Rating : 4.4/5 (822 download)
Download or read book Nitrogen Management in Crop Production written by Nand Kumar Fageria and published by CRC Press. This book was released on 2014-06-25 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the main approaches for safeguarding food security, sustainable development has increased demand for knowledge on fertilizer management in crop production. Among essential plant nutrients, nitrogen is one of the most important yield-limiting nutrients, mainly responsible for determining yield and yield components in cereals and legumes. It is also responsible for the activation of many enzymes and, of course, plays an important role in photosynthesis. With a recovery efficiency of less than 50 percent in most cropping systems, a large portion of the nitrogen applied as fertilizer is not used by plants, creating environmental and economic issues. Nitrogen Management in Crop Production covers the critical aspects for the judicious use of nitrogen in cropping systems. This includes appropriate methods of nitrogen application, effective source and timing of application during crop growth cycles, use of an adequate application rate to avoid loss and reduce cost, use of nitrogen-efficient crop genotypes, and use of legumes that fix sufficient amounts of atmospheric nitrogen. There is also a chapter on organic matter and its role in sustainability. This book presents recent information from the international literature, making it relevant for most agroecological regions. Chapters provide experimental results to aid in practical application of the information. The book contains color photos of nitrogen deficiency symptoms to serve as a guide for important crop species, such as rice, dry bean, wheat, soybean, and corn. It also includes numerous tables and figures, providing an easy-to-read reference.
Author : J. W. Schwartz
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (319 download)
Download or read book Liming Acid Soils written by J. W. Schwartz and published by . This book was released on 1979 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.:/5 (319 download)
Download or read book Agricultural Nitrogen Management to Protect Water Quality written by and published by . This book was released on 1998 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : OECD
Publisher : OECD Publishing
ISBN 13 : 9264186212
Total Pages : 185 pages
Book Rating : 4.2/5 (641 download)
Download or read book OECD Compendium of Agri-environmental Indicators written by OECD and published by OECD Publishing. This book was released on 2013-06-25 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides comprehensive data and analysis on the environmental performance of agriculture in OECD countries since 1990, covering soil, water, air and biodiversity and looking at recent policy developments in all 34 countries.
Author : E. R. Flint
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.:/5 (31 download)
Download or read book Fertilizer Suggestions written by E. R. Flint and published by . This book was released on 1905 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Tsz Him Lo
Publisher :
ISBN 13 : 9780438707771
Total Pages : 0 pages
Book Rating : 4.7/5 (77 download)
Download or read book Water and Nitrogen Interactions in Maize Production written by Tsz Him Lo and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is the author's sincere hope that the concepts, equations, and methods advanced by this dissertation will be tested, refined, and ultimately applied to improve on-farm irrigation and nitrogen management in west central Nebraska and beyond.
Author : James Stuart Schepers
Publisher : ASA-CSSA-SSSA
ISBN 13 : 9780891181644
Total Pages : 994 pages
Book Rating : 4.1/5 (816 download)
Download or read book Nitrogen in Agricultural Systems written by James Stuart Schepers and published by ASA-CSSA-SSSA. This book was released on 2008 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt: Review of the principles and management implications related to nitrogen in the soil-plant-water system.
Author : Richard Ferguson
Publisher :
ISBN 13 :
Total Pages : 7 pages
Book Rating : 4.:/5 (33 download)
Download or read book Precision Agriculture written by Richard Ferguson and published by . This book was released on 2007 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mary Gladys Marshall
Publisher :
ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.3/5 (243 download)
Download or read book Outcomes of nitrogen fertilizer management programs written by Mary Gladys Marshall and published by . This book was released on 1998 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andy Clark
Publisher : DIANE Publishing
ISBN 13 : 1437903797
Total Pages : 248 pages
Book Rating : 4.4/5 (379 download)
Download or read book Managing Cover Crops Profitably (3rd Ed. ) written by Andy Clark and published by DIANE Publishing. This book was released on 2008-07 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cover crops slow erosion, improve soil, smother weeds, enhance nutrient and moisture availability, help control many pests and bring a host of other benefits to your farm. At the same time, they can reduce costs, increase profits and even create new sources of income. You¿ll reap dividends on your cover crop investments for years, since their benefits accumulate over the long term. This book will help you find which ones are right for you. Captures farmer and other research results from the past ten years. The authors verified the info. from the 2nd ed., added new results and updated farmer profiles and research data, and added 2 chap. Includes maps and charts, detailed narratives about individual cover crop species, and chap. about aspects of cover cropping.
