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Fertilizer Trials On Dryland Winter Wheat
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Book Synopsis Fertilizer Trials on Dryland Winter Wheat by : I. G. Sampson
Download or read book Fertilizer Trials on Dryland Winter Wheat written by I. G. Sampson and published by . This book was released on 1951 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wheat is one of the major crops of Utah and for more than 50 years farmers have been raising wheat on the dry lands of the state. The system they use is known as the alternate cropping or crop-follow system and consists of one year of crop alternating with one year of clean cultivation known as fallow. Wheat removes a considerable amount of the natural plant food elements from the soil each year. This is especially true of nitrogen. According to Bracken and Greaves (9) the original low supply of nitrogen in most Utah soils together with the depleting effects of alternate wheat and fallow has the possibility of making nitrogen rather than moisture the limiting factor of crop production in certain dry-farm areas. The amount of nitrogen removed from the soil by the wheat crop is only a portion of the total supply. Such factors as leaching to a lower depth beyond the feeding range of the plant, erosion, denitrification, and volatilization through biological and possibly chemical action are thought to be responsible for the loss of nitrogen unaccounted for by crop removal. The results of several investigators indicate that this loss is approximately twice as much as was removed by the crop. Since nitrogen is one of the major factors responsible for high yields and high quality of wheat, it naturally follows that any reduction of the amount of nitrogen in the soil produces a corresponding reduction in yield and quality of wheat. Recent reports show that this condition exists in Utah as well as in other areas. As a result of this reduction in yield and quality of wheat, processors are concerned about the problems. The seriousness of the problem cannot be over-emphasized. Ways and means of checking these losses and subsequently increasing the yield and quality are being studied. Three possible procedures for increasing soil nitrogen have been suggested: 1. the use of legumes, especially alfalfa, in a rotation program; 2. non-symbiotic nitrogen fixation: and 3. the use of commercial fertilizers. Since legumes have not been grown to any great extent, the only other natural source of nitrogen has been non-symbiotic fixation. Evidence in this field of investigation, however, indicates that this source is inadequate and that other sources must be bad. Also, the data indicate that no effective methods have been found which increase non-symbiotic fixation. Limited information suggests that further study is needed on the use of legumes for increasing the nitrogen and organic matter content of dry farm soils. This investigation is confined to the use of commercial fertilizers as one solution to the general problem.
Book Synopsis Fertilizer Trials on Irrigated Winter Wheat at Seven Location, High Plains, 1957 by : Alex Pope
Download or read book Fertilizer Trials on Irrigated Winter Wheat at Seven Location, High Plains, 1957 written by Alex Pope and published by . This book was released on 1958 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evapotranspiration and Soil Moisture-fertilizer Interrelations with Irrigated Winter Wheat in the Southern High Plains by : Marvin E. Jensen
Download or read book Evapotranspiration and Soil Moisture-fertilizer Interrelations with Irrigated Winter Wheat in the Southern High Plains written by Marvin E. Jensen and published by . This book was released on 1965 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fertilizer Experiments with Winter Wheat in Western Oregon by :
Download or read book Fertilizer Experiments with Winter Wheat in Western Oregon written by and published by . This book was released on 1972 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of Fertilizer Placement and Rates on Winter Wheat by : D. R. Griffith
Download or read book A Study of Fertilizer Placement and Rates on Winter Wheat written by D. R. Griffith and published by . This book was released on 1963 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Western Fertilizer Handbook by : Western Plant Health Association
Download or read book Western Fertilizer Handbook written by Western Plant Health Association and published by . This book was released on 2010-03 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book "is written specifically for western agriculture and for individuals seeking practical, production-oriented, problem-solving information. ... Basic information is included on properties of soil, water, and plants. Fertilizer products, their properties, and their management are presented, as is related information on soil amendments and irrigation water quality. All this is framed in the context of western agriculture--that is, primarily high-yielding irrigated crops grown on soils frequently having a pH above 7.0"--Foreword.
Book Synopsis A Study of Fertilizer Placement and Rates on Winter Wheat by :
Download or read book A Study of Fertilizer Placement and Rates on Winter Wheat written by and published by . This book was released on 1963 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of Fertilizer Placement and Rates on Winter Wheat by : D. R. Griffith
Download or read book Study of Fertilizer Placement and Rates on Winter Wheat written by D. R. Griffith and published by . This book was released on 1965 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book L'obstination des femmes written by and published by . This book was released on 1990 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Managing Cover Crops Profitably (3rd Ed. ) by : Andy Clark
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.
Book Synopsis Dryland Wheat Fertilization Trials in Wyoming, a Preliminary Report by : Hugh Walter Hough
Download or read book Dryland Wheat Fertilization Trials in Wyoming, a Preliminary Report written by Hugh Walter Hough and published by . This book was released on 1978 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Nutrition written by Walter Horst and published by Springer Science & Business Media. This book was released on 2006-05-18 with total page 1068 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is a compilation of extended abstracts of all papers presented at the 14th International Plant Nutrition Colloquium. Over 500 oral and poster presentations illustrate current knowledge and research emphasis in this subject, providing a comprehensive view of the state of plant nutrition research.
Book Synopsis Components of Yield from a Winter Wheat-fertilizer Study by : Charles Lynn Moore
Download or read book Components of Yield from a Winter Wheat-fertilizer Study written by Charles Lynn Moore and published by . This book was released on 1962 with total page 72 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 Solute Movement in the Soil-root System by : Peter Hague Nye
Download or read book Solute Movement in the Soil-root System written by Peter Hague Nye and published by Univ of California Press. This book was released on 1977 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dryland Wheat Fertilization Trials in Wyoming, a Preliminary Report by : Hugh Walter Hough
Download or read book Dryland Wheat Fertilization Trials in Wyoming, a Preliminary Report written by Hugh Walter Hough and published by . This book was released on 1978 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Fertility Level on Plant Growth and Development, Water Uptake and Water Stress in Dryland Wheat Production by : Raul Jose Agamennoni
Download or read book The Effect of Fertility Level on Plant Growth and Development, Water Uptake and Water Stress in Dryland Wheat Production written by Raul Jose Agamennoni and published by . This book was released on 1983 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dryland winter wheat in eastern Oregon is usually subjected to water stress several times during the growing period. Moreover, the last three months of growth period depend strongly on the available soil water. The fertility level, stage of growth, availability of soil water and climatic conditions all interact to determine the severity of crop water stress. The level of nitrogen and phosphorus fertility in the growing wheat crop can affect plant growth and development, water uptake and the incidence and severity of water stress. In order to gain a better understanding of the complex interactions leading to water stress in the wheat crop, a means of determining when and how long the stress occurs is needed. The Crop Water Stress Index (CWSI) developed by Idso et al in 1981 utilizing the infrared thermometer was used to determine the crop water stress level during the critical spring growth period. The objectives of this work were: (1) to study the effect of N and P fertilization levels on crop water stress and water uptake by the crop; (2) to describe the crop water stress phenomenon in order to help explain when, and why water stress occurs; (3) to analyze the dry matter production and partitioning and yield components as related to fertilization, crop water stress and date of planting; and (4) to attempt to develop an equation to predict grain yield of soft white winter wheat in Oregon, given a certain level of water stress assessed by the CWSI. Two types of field fertilizer experiments were conducted using a soft white winter wheat cv. Stephens at the Sherman Experiment Station, Moro, Oregon during the 1982 and 1983 seasons. Atypical climatic conditions with precipitation and relative humidity levels greater than, and maximum temperatures less than the long-term means combined to produce a relatively low level of crop water stress. There were two relatively short periods in 1982 in which moderate to severe crop water stress occurred. The CWSI proved capable of detecting the severity and duration of these stress periods with a good level of reliability. Nitrogen fertilization increased the total crop water uptake. Coincidentally, CWSI level was always reduced with the addition of N. The only exception was in one N experiment in 1982, in which water uptake was not increased with N fertilization. The total dry matter production and yield relationship was indicative of the climatic conditions which produced nearly optimum soil water conditions in the 1982 and 1983 seasons. Nitrogen increased total dry matter production during both seasons, with a higher level being evident in 1983. The yield increase from the added nitrogen was mainly due to an increase in spike number and to a lesser extent an increase in the number of kernels per spike. Late plantings produced larger individual spikes with a greater number of kernels than earlier seeding, but these differences were not great enough to overcome the drastic reduction in spike number. A logarithmic relationship between grain yield and the CWSI averaged on a daily basis was developed. Although somewhat inconsistent, the need to account for other factors such as N availability and the differences in vegetative growth produced before the period of CWSI study, was recognized. The assumption that CWSI alone could predict grain yield was originally based on limited soil water conditions. If that condition is not present, the other variables that may limit yield potential must be considered. The use of infrared thermometry technology and the CWSI system appear to be feasible tools to determine crop water stress at the field level. However, one can expect more consistent and reliable results under the more normal stress conditions.
