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Growth Tissue N Content And Yield Response Of Corn Hybrids To Nitrogen Fertilization In A Range Of Environments
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Book Synopsis Growth, Tissue-N Content, and Yield Response of Corn Hybrids to Nitrogen Fertilization in a Range of Environments by : Sudirman Yahya
Download or read book Growth, Tissue-N Content, and Yield Response of Corn Hybrids to Nitrogen Fertilization in a Range of Environments written by Sudirman Yahya and published by . This book was released on 1982 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Response of Corn Hybrids when Grown on Productive Soil to Nitrogen Fertilization by : Sudirman Yahya
Download or read book Response of Corn Hybrids when Grown on Productive Soil to Nitrogen Fertilization written by Sudirman Yahya and published by . This book was released on 1980 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis University of Wisconsin Agronomy Department, the First 100 Years by : University of Wisconsin--Madison. Department of Agronomy
Download or read book University of Wisconsin Agronomy Department, the First 100 Years written by University of Wisconsin--Madison. Department of Agronomy and published by . This book was released on 2003 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Some Measurements of Response of Corn Hybrids (Zea Mays L.) on Productive Soil to Nitrogen Fertilization by : David Mfinzi Noah Mbewe
Download or read book Some Measurements of Response of Corn Hybrids (Zea Mays L.) on Productive Soil to Nitrogen Fertilization written by David Mfinzi Noah Mbewe and published by . This book was released on 1978 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1999 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth and Yield Response of Corn Hybrids (Zea Mays L.) to Straw Mulch and Plant Population by : Ali M. Al-Darby
Download or read book Growth and Yield Response of Corn Hybrids (Zea Mays L.) to Straw Mulch and Plant Population written by Ali M. Al-Darby and published by . This book was released on 1982 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nitrogen in the Environment: Sources, Problems and Management by : R.F. Follett
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.
Book Synopsis Effects of Shading, Relative Growth Rate and Population Density on Weed Responses to Nitrogen Management in Corn by : Matthew Mechling Harbur
Download or read book Effects of Shading, Relative Growth Rate and Population Density on Weed Responses to Nitrogen Management in Corn written by Matthew Mechling Harbur and published by . This book was released on 2003 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Three experiments were conducted to identify mechanisms that might explain variations in weed responses to nitrogen (N) fertilization. The first experiment investigated the responses of two crop and six weed species to N fertilization rate and shading in a growth chamber environment. The dry weight and leaf area responses, among species, to N supply and shading were positively correlated with their maximum relative growth rates with the high N fertilization rate. Relative growth rates, among species, were negatively correlated with mean seed weights. The second experiment was conducted in field plots to investigate the effects of N fertilization timing and corn (Zea mays L.) population density on giant foxtail (Setaria faberi Herrm.), velvetleaf (Abutilon theophrasti Medicus), and common waterhemp (Amaranthus rudis Sauer) competition with corn. Giant foxtail reduced corn yield when no N fertilizer was applied until late June (POST N) but not when N fertilizer was applied prior to corn emergence (PRE N). Velvetleaf seed yield was greater with the PRE N application than the POST N application, but giant foxtail seed yield was lower with PRE N than with POST N. The high corn population density reduced velvetleaf and giant foxtail seed yields, compared to the low corn population density. Corn, velvetleaf and giant foxtail seed yields were associated with their heights and light interception in mid-season. N fertilization timing and corn population density did not affect common waterhemp. A third experiment investigated the interactions between corn and velvetleaf seedlings grown in a replacement series, as affected by N fertilization rate, in a glasshouse environment. N effects on seedling size of each species were positively correlated with the population density of that species. Relative yield responses suggested that velvetleaf size was reduced by corn competition and that antagonism might have occurred. A growth analysis of corn and velvetleaf seedling monocultures identified N responses. The relative growth rates of velvetleaf were greater than those of corn. The net assimilation rate of velvetleaf was lower with the high N supply than with low N, perhaps due to an increase in self-shading with high N.
Download or read book Bulletin written by and published by . This book was released on 1975 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Factors Affecting the Nutrient Content and Yield Response of Corn to Nitrogen, Phosphorus, and Potassium Fertilization by : Bruce Lloyd Baird
Download or read book Factors Affecting the Nutrient Content and Yield Response of Corn to Nitrogen, Phosphorus, and Potassium Fertilization written by Bruce Lloyd Baird and published by . This book was released on 1958 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Response of Corn Inbreds and Their Hybrids to Different Nutrient Environments by : Galal Mohammad Abelmoneim Mahgoub
Download or read book Response of Corn Inbreds and Their Hybrids to Different Nutrient Environments written by Galal Mohammad Abelmoneim Mahgoub and published by . This book was released on 1987 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selected Water Resources Abstracts by :
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1989 with total page 878 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 1973 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Influence of N Fertilization and Plant Population on Nutrient Uptake, Several Yield Components and Some Agronomic Characteristics of Five Corn (Zea Mays L.) Hybrids by : Donald William Kemper
Download or read book The Influence of N Fertilization and Plant Population on Nutrient Uptake, Several Yield Components and Some Agronomic Characteristics of Five Corn (Zea Mays L.) Hybrids written by Donald William Kemper and published by . This book was released on 1971 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Field experiments were conducted in 1969 and 1970 to determine the effects of corn hybrid, rate of applied nitrogen and plant population on nutrient uptake, yield, several yield components and several agronomic characteristics of corn (Zea mays L.). The corn was planted at equidistant intervals with plant spacings ranging from 25,4 to 50.8 on, the range of plant populations was 39,520 to 158,080 plants/ha. Nitrogen was broadcast in 67 kg increments (0 to 538 kg of nitrogen/ha) at planting as ammonium nitrate. The corn hybrids used wereN6 x B14, N31 x N28, N28 x C103, Nebr. 808 and Ner. 501D. Irrigation water was supplied as necessary. Ramrod and atrazine were applied for weed control at the rate of 3.36 and 1.12 kh/ha respectively. The parameters measured include the following: uptake of nitrogen, phosphorus, potassium and sulfur (percentage uptake, uptake/plant and uptake/unit area) and dry matter accumulation at the 6-, 11-leaf and at the silking stage were measured. Crain yield, the number of cars and plants per plot and the number of ears per 100 plants, shelling percentage, dry matter of the graing, car lenght, ear width, 100 kernel weight, grain protein, dates of 50% tassel and 50% silked, and dates of the first and last pollen shed were the measured parameters. Plant height, stalk diameter, leaf area and LAI were measured only in 1969. Lodging, breakage and stripping damage were measured only in 1970 becuase of severe wind damage to the crop. As a result of decreased plant size, the uptake of nutrition...
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1976 with total page 1732 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Soil Amendments and Environmental Quality by : Jack E. Rechcigl
Download or read book Soil Amendments and Environmental Quality written by Jack E. Rechcigl and published by CRC Press. This book was released on 1995-09-25 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a comprehensive and balanced overview of soil amendments and their effect on the environment. It encompasses both positive and negative aspects of chemical fertilizers that supply nitrogen, phosphorous, sulfur, lime, micronutrients, and trace metals. Pros and cons are discussed with respect to the optimal and the most environmentally sound use of soil amendments, and guidance is provided on how to minimize the environmental effects of amendments. Natural fertilizers, including manure, sludge, fly ash, phosphogypsum, and byproduct gypsum are also discussed. Alternative agronomic practices and biotechnology that ameliorate or minimize potential adverse effects of fertilizer use are examined in detail. This authoritative and up-to-date treatise is multidisciplinary in nature and international in scope, a powerful reference tool for researchers, a thorough guide for practitioners and policy makers, and an excellent text book for academic courses.
Book Synopsis Soil Testing and Plant Analysis for Fertilizer Recommendations by :
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:
