Download or read book Influence of Soil Variability on Optimum Soil Sampling and Fertilizer Use written by Donald Ray Jensen and published by . This book was released on 1962 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Influence of Soil Variability and Time of Sampling on Soil Test Results written by Josu De Gaubeka and published by . This book was released on 1970 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Precision Agriculture Basics written by D. Kent Shannon and published by John Wiley & Sons. This book was released on 2020-01-22 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the growing popularity and availability of precision equipment, farmers and producers have access to more data than ever before. With proper implementation, precision agriculture management can improve profitability and sustainability of production. Precision Agriculture Basics is geared at students, crop consultants, farmers, extension workers, and practitioners that are interested in practical applications of site-specific agricultural management. Using a multidisciplinary approach, readers are taught to make data-driven on-farm decisions using the most current knowledge and tools in crop science, agricultural engineering, and geostatistics. Precision Agriculture Basics also features a stunning video glossary including interviews with agronomists on the job and in the field.
Download or read book The Impact of Soil Sampling Errors on Variable Rate Fertilization written by R. D. Lee and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Variable rate fertilization of an agricultural field is done taking into account spatial variability in the soil's characteristics. Most often, spatial variability in the soil's fertility is the primary characteristic used to determine the differences in fertilizers applied from one point to the next. For several years the Idaho National Engineering and Environmental Laboratory (INEEL) has been developing a Decision Support System for Agriculture (DSS4Ag) to determine the economically optimum recipe of various fertilizers to apply at each site in a field, based on existing soil fertility at the site, predicted yield of the crop that would result (and a predicted harvest-time market price), and the current costs and compositions of the fertilizers to be applied. Typically, soil is sampled at selected points within a field, the soil samples are analyzed in a lab, and the lab-measured soil fertility of the point samples is used for spatial interpolation, in some statistical manner, to determine the soil fertility at all other points in the field. Then a decision tool determines the fertilizers to apply at each point. Our research was conducted to measure the impact on the variable rate fertilization recipe caused by variability in the measurement of the soil's fertility at the sampling points. The variability could be laboratory analytical errors or errors from variation in the sample collection method. The results show that for many of the fertility parameters, laboratory measurement error variance exceeds the estimated variability of the fertility measure across grid locations. These errors resulted in DSS4Ag fertilizer recipe recommended application rates that differed by up to 138 pounds of urea per acre, with half the field differing by more than 57 pounds of urea per acre. For potash the difference in application rate was up to 895 pounds per acre and over half the field differed by more than 242 pounds of potash per acre. Urea and potash differences accounted for almost 87% of the cost difference. The sum of these differences could result in a $34 per acre cost difference for the fertilization. Because of these differences, better analysis or better sampling methods may need to be done, or more samples collected, to ensure that the soil measurements are truly representative of the field's spatial variability.
Download or read book Soil Sampling and Methods of Analysis written by M.R. Carter and published by CRC Press. This book was released on 2007-08-03 with total page 1264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thoroughly updated and revised, this second edition of the bestselling Soil Sampling and Methods of Analysis presents several new chapters in the areas of biological and physical analysis and soil sampling. Reflecting the burgeoning interest in soil ecology, new contributions describe the growing number and assortment of new microbiological
Download or read book Precision Agriculture written by John V. Lake and published by John Wiley & Sons. This book was released on 2008-04-30 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book investigates new agricultural systems such as organic and green manuring, as well as integrated pest management practices, and looks at how they can improve farm productivity against the enhancements for the environment. Much of the information presented focuses on microinvestigation of the soil, and on the effects of soil variability within fields on yields and nutrient flows.
Download or read book Soil Testing and Plant Analysis for Fertilizer Recommendation written by Karl Schneider and published by . This book was released on 1993 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Properties and Management of Soils in the Tropics written by Pedro A. Sanchez and published by Cambridge University Press. This book was released on 2019-01-10 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-awaited second edition of classic textbook, brought completely up to date, for courses on tropical soils, and reference for scientists and professionals.
Download or read book Dissertation Abstracts written by and published by . This book was released on 1962-07 with total page 1274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Testing and Plant Analysis written by Robert Lee Westerman and published by American Society of Agronomy. This book was released on 1990 with total page 824 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book summarizes the current knowledge and experiences on the use of soil testing and plant analysis as a diagnostic tool for assessing nutritional requirements of crops, efficient fertilizer use, saline-sodic conditions, and toxicity of metals. Discussions on analytical instrumentation used in soil testing, plant analysis, and data processing are included.
Download or read book Soil Testing and Plant Analysis for Fertilizer Recommendations written by and published by . This book was released on 1996 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Sampling Preparation and Analysis Second Edition written by Kim H. Tan and published by CRC Press. This book was released on 2005-04-29 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt: As with the highly popular original, this new edition of Soil Sampling, Preparation, and Analysis provides students with an exceptionally clear description of the sampling and analysis methods most commonly used in modern soil laboratories around the world. What sets it apart as the first choice of professors is the grounding it offers in fundamental principles, professional protocols, and specific procedures. What makes it especially popular with students is that it spares them from having to tote large volumes for the sake of a page or two. Fully revised to introduce the latest advances, the text is lucidly illustrated with original results garnered from years of hands-on experiments conducted by the author and his students. In response to requests from active users of the first edition, these new features have been added: § Three new chapters on soil and plant test methods § A focus on testing and analysis limited to edaphology, as opposed to edaphology and pedology as a whole in the ecosystem § Information and insight reflecting the author’s expertise on electron microscopy and nuclear magnetic resonance § Extensive revisions and expansion to include recent advances and shifting interests in the field Soil Sampling, Preparation, and Analysis is divided into three sections: the first covers principles of soil sampling, sources of errors, and variability of results; the second explains common procedures for extraction and analysis in soil plant testing; and the last covers instrumentation. While Professor Tan designed and further honed the book to serve the practical needs of students, with this volume he also provides them with an essential reference that will continue to serve them throughout their training and into their careers.
Download or read book Soil Spatial Variability as Influenced by Landscape Position and Soil Sampling Strategy written by Jiyul Chang and published by . This book was released on 1997 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Report Iowa State University Statistical Laboratory written by Iowa State University. Statistical Laboratory and published by . This book was released on 1961 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Testing and Plant Analysis for Fertilizer Recommendations written by and published by . This book was released on 1996 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geostatistical Applications for Precision Agriculture written by Margaret A. Oliver and published by Springer Science & Business Media. This book was released on 2010-07-27 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this book is to bring together a series of contributions from experts in the field to cover the major aspects of the application of geostatistics in precision agriculture. The focus will not be on theory, although there is a need for some theory to set the methods in their appropriate context. The subject areas identified and the authors selected have applied the methods in a precision agriculture framework. The papers will reflect the wide range of methods available and how they can be applied practically in the context of precision agriculture. This book is likely to have more impact as it becomes increasingly possible to obtain data cheaply and more farmers use onboard digital maps of soil and crops to manage their land. It might also stimulate more software development for geostatistics in PA.
Download or read book Soil Landscape Analysis written by Francis Doan Hole and published by Government Institutes. This book was released on 1985 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: All forms of plant, animal, and human life are supported by soil, and there has been a recent need for a fully documented analysis of terrain that draws on many available sources in this country and abroad. This illustrated text has answered that need. Going beyond soil morphology and classification to provide an interpretation of the patterns of soil bodies and the distribution of plant and animal communities on land, the authors have provided an ideal introduction for students of the landscape.
