Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Rate Placement And Source Of Phosphorus Fertilizer Effects On Corn Yields As Influenced By Weather Soil And Management Variables In Long Term Experiments In Iowa
Download Rate Placement And Source Of Phosphorus Fertilizer Effects On Corn Yields As Influenced By Weather Soil And Management Variables In Long Term Experiments In Iowa full books in PDF, epub, and Kindle. Read online Rate Placement And Source Of Phosphorus Fertilizer Effects On Corn Yields As Influenced By Weather Soil And Management Variables In Long Term Experiments In Iowa ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Rate, Placement, and Source of Phosphorus Fertilizer Effects on Corn Yields as Influenced by Weather, Soil, and Management Variables in Long-term Experiments in Iowa by : Eduardo Felipe Casanova
Download or read book Rate, Placement, and Source of Phosphorus Fertilizer Effects on Corn Yields as Influenced by Weather, Soil, and Management Variables in Long-term Experiments in Iowa written by Eduardo Felipe Casanova and published by . This book was released on 1979 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fertilizer Abstracts written by and published by . This book was released on 1980 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Iowa State Journal of Research by : Iowa. State College, Cedar Falls
Download or read book Iowa State Journal of Research written by Iowa. State College, Cedar Falls and published by . This book was released on 1979 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iowa State Journal of Research written by and published by . This book was released on 1979 with total page 958 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agronomy News written by and published by . This book was released on 1978 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sept.-Oct. issue includes list of theses and dissertations for U.S. and Canadian graduate degrees granted in crop science, soil science, and agronomic science during the previous academic year.
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1978 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comprehensive Dissertation Index by :
Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1984 with total page 1086 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1973- include the following subject areas: Biological sciences, Agriculture, Chemistry, Environmental sciences, Health sciences, Engineering, Mathematics and statistics, Earth sciences, Physics, Education, Psychology, Sociology, Anthropology, History, Law & political science, Business & economics, Geography & regional planning, Language & literature, Fine arts, Library & information science, Mass communications, Music, Philosophy and Religion.
Download or read book National Union Catalog written by and published by . This book was released on 1980 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes entries for maps and atlases.
Book Synopsis Comprehensive Dissertation Index: Agriculture by :
Download or read book Comprehensive Dissertation Index: Agriculture written by and published by . This book was released on 1984 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Long-term Phosphorus Fertilizer Placement, Rate, and Source, and Research in the U.S. Midwest by : Cristie LeAnne Edwards
Download or read book Evaluation of Long-term Phosphorus Fertilizer Placement, Rate, and Source, and Research in the U.S. Midwest written by Cristie LeAnne Edwards and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The appropriate management for phosphorus (P) fertilizer can have significant agronomic, economic, as well as environmental impact. Studies in Kansas have evaluated different management systems to determine best management practices (BMP). The first component of this dissertation is a comprehensive review of tillage system and P fertilizer placement interaction. This review included studies completed in the U.S. Midwest. Results of this review showed greater corn yields with conventional tillage and broadcast applications when soil test P levels (STP) were below 20 mg P kg−1. However, soybean yield was highest in no-till systems with broadcast P fertilizer applications. The second component if this dissertation was a long-term study conducted in Kansas to evaluate the effect of P fertilizer placement on corn and soybean production. Results showed that under strip-tillage, P fertilizer placement significantly affected corn growth, but, seldom resulted in yield response difference among placement methods. Phosphorus application as starter fertilizer at planting showed the most consistent yield response. In addition to the agronomic aspect of this study, the third component of this dissertation consisted of an economic analysis using partial budgets calculated using both fixed and varying prices and costs to compare management practices. With decreased application costs associated with deep banding in strip-tillage system, net returns are greater than broadcast applications. The highest net responses were observed with starter P fertilizer applications. The fourth component of this dissertation included a study evaluating the effects of chelated fertilizer on nutrients, such as P, Fe, Mn, and Zn in soybean. Results from our study showed that both ethylenediamine tetraacetic acid (EDTA)+P and hydroxyethyl ethylenediamine tetraacetic acid (HEDTA)+P resulted in greater concentrations and uptake of Fe and lower Mn uptake in soybean. However, the application of glucoheptonate (GCH)+P had no negative effect on Mn uptake compared to EDTA+P and HEDTA+P. Across locations, EDTA+P and HEDTA+P showed higher yield than GCH+P. The use of long-term studies and comprehensive reviews can provide a unique perspective and better understanding of the most appropriate BMPs for P fertilizer management. Many agronomic and environmental implications of P fertilizer management and the interactions with tillage systems and soils may only become noticeable after multiple years or in a variety of conditions.
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.
Book Synopsis Impact of Phosphorus Placement on Corn Rooting Dynamics Under Long-term Strip-tillage by : Marcie Renee Sindt
Download or read book Impact of Phosphorus Placement on Corn Rooting Dynamics Under Long-term Strip-tillage written by Marcie Renee Sindt and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil profile phosphorus (P) distribution is known to influence rooting dynamics. However, it's unknown if P placement in long-term no-till management influences root development in high P-testing soils. The research objective was to compare impacts of P placement on corn (Zea mays, L.) root development. Replicated field trials were conducted in Manhattan, KS on a long-term, strip-tilled, corn-soybean-wheat rotation. Five P treatments were applied to the corn rotation for 11 years and included a control (0 kg), 22 kg starter and 67 kg broadcast (BC+ST), 90 kg broadcast (BC), 22 kg starter and 67 kg deep band (DB+ST), and 90 kg deep band (DB) of P2O5 per hectare. This study was conducted in 2015 and 2016 -- years 10 and 11 of the long-term study, respectively. All treatments tested above 20 ppm P, with highest concentrations at 10-15 cm for DB, and 0-5 cm for all other treatments. Root length treatment differences were observed primarily in the upper 35 cm during vegetative growth. In 2015, both total root length (TRL) and root length by depth were significantly less for starter P treatments. Though no TRL differences were observed in 2016, BC+ST exhibited reduced root length compared to BC across multiple depths. The BC and DB treatments had similar root growth in 2015. In 2016, greater TRL and root length across multiple depths were observed for BC compared to DB. Although grain yield was not affected, this study showed that P placement in high testing soils impacts root development, particularly during vegetative growth.
Book Synopsis Long-term Effects of Fertilizer, Manure and Plowing Depth on Corn by : Maurice Lee Vitosh
Download or read book Long-term Effects of Fertilizer, Manure and Plowing Depth on Corn written by Maurice Lee Vitosh and published by . This book was released on 1972 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Phosphorus Fertilization and Liming on Yield and Chemical Composition of Corn, Wheat and Red Clover by : Eugene Carter Doll
Download or read book Effect of Phosphorus Fertilization and Liming on Yield and Chemical Composition of Corn, Wheat and Red Clover written by Eugene Carter Doll and published by . This book was released on 1963 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Liming Acid Soils by : J. W. Schwartz
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:
Book Synopsis Long Term Effects of Phosphorus and Conservation Tillage Management on Crop Yield and Soil Phosphorus in Corn-soybean Rotations by : Jacob Prater
Download or read book Long Term Effects of Phosphorus and Conservation Tillage Management on Crop Yield and Soil Phosphorus in Corn-soybean Rotations written by Jacob Prater and published by . This book was released on 2007 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract not available.
Book Synopsis The Effect of High Rates of Nitrogen, Phosphorus and Potassium Fertilizers on Corn Grain Yields and on Their Movement and Concentration in the Soil by : Farideh Eivazi-Baghery
Download or read book The Effect of High Rates of Nitrogen, Phosphorus and Potassium Fertilizers on Corn Grain Yields and on Their Movement and Concentration in the Soil written by Farideh Eivazi-Baghery and published by . This book was released on 1980 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
