Dynamics Of Early Season Weed Management And Soybean Nutrition

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Dynamics of Early-season Weed Management and Soybean Nutrition

Author : Nick T. Harre
Publisher :
ISBN 13 :
Total Pages : 182 pages
Book Rating : 4.:/5 (91 download)

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Book Synopsis Dynamics of Early-season Weed Management and Soybean Nutrition by : Nick T. Harre

Download or read book Dynamics of Early-season Weed Management and Soybean Nutrition written by Nick T. Harre and published by . This book was released on 2014 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The popularity of growers using only postemergence (POST) herbicides for weed management in soybean was enabled by the commercialization of glyphosate-resistant soybean. Field experiments were conducted across four sites throughout southern Illinois in 2012 and 2013 to study the influence of early-season weed management strategies on soybean nutrient accumulation, grain yield parameters, and the acquisition of nutrients by broadleaved and grass weeds. Increasing periods of weed competition duration were established by removing weeds at heights of 10, 20, 30 or 45 cm with glyphosate. A weed-free treatment utilizing a comprehensive soil residual and POST herbicide program was included to implement a weed-free comparison. Two standard herbicide management strategies that simulate common grower practices were also evaluated for comparison: flumioxazin PRE followed by glyphosate POST and two sequential POST glyphosate applications. Averaged across all 11 mineral nutrients analyzed in this experiment, broadleaved weeds accumulated 149 and 108% more nutrients than grasses in 2012 and 2013, respectively. Competition from 20-cm weeds reduced the acquisition of N, P, Ca, Mg, S, Fe, B, Cu, and Zn by soybean in 2012; these nutrients in addition to K and Mn were reduced by the same level of competition in 2013. N and Fe were the nutrients in soybean most notably impacted by weed interference. Reductions in soybean grain yield were the result of competition with 30-cm weeds in 2012, and 10-cm weeds in 2013; while, both standard herbicide regimens yielded less than the weed-free treatment in 2013 only. Additionally in 2013, average soybean seed weight and grain oil content was reduced when weeds were not removed before a height of 10 and 20 cm, respectively. The rate of decomposition and nutrient release was measured for waterhemp and giant foxtail desiccated by glyphosate at heights of 10, 20, 30, and 45 cm in two southern Illinois soybean fields. Weed biomass was grown under greenhouse conditions to ensure homogeneity and litterbag methodology was utilized to track in situ mass and nutrient losses, expressed as a decay constant (k) regressed over time according to the single exponential decay model. The effect of specie and height both had a strong influence on the intrinsic properties of the weed biomass and the associated rate of decay. Concentrations of the recalcitrant cell wall components (cellulose, hemicellulose, and lignin) were generally greatest as weed height (plant age and development) increased and with giant foxtail compared with waterhemp. Ca, Mg, and S concentrations were greater in waterhemp, while N was greater in giant foxtail. N and K concentrations decreased with increasing weed height. After 16 weeks, 10-cm waterhemp and giant foxtail detritus had lost 10 and 12% more mass compared to the 45-cm height. Decomposition rates revealed mass loss was highest for 10-cm waterhemp (kD = 0.022) and lowest for 45-cm giant foxtail (kD = 0.011) and this process was negatively correlated to the overall amount of cell wall constituents (r = -0.73). Nutrient release rates followed a similar trend in that shorter (younger) weeds and waterhemp liberated nutrients more readily. Across all tested plant material, K was the nutrient most rapidly released, whereas, Ca was the most strongly retained nutrient. Although the pressing challenge of managing herbicide-resistant weeds justifies the implementation of early-season weed control tactics, this research suggests there are ancillary benefits that are provided by this strategy. The use of a robust, broad-spectrum soil residual herbicide program in conjunction with timely POST applications provides the foundation for early-season weed management, thereby minimizing non-crop nutrient use and enhancing the nutrient acquisition capacity in soybean. This strategy facilitates more sustainable crop production by requiring fewer supplemental nutritional inputs while also protecting grain yield. (Abstract shortened by UMI.)

Applying Crop and Weed Competitive Dynamics For Weed Management in Soybean and Peanut

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (656 download)

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Book Synopsis Applying Crop and Weed Competitive Dynamics For Weed Management in Soybean and Peanut by :

Download or read book Applying Crop and Weed Competitive Dynamics For Weed Management in Soybean and Peanut written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Demand for organic food products has consistently increased for more than 20 years. Demand for organic grain has been particularly high, leading to price premiums of over double the conventional price. The largest obstacle to organic soybean production is weed management. The first investigation aimed at improving weed management in organic soybean tested the effectiveness of pre-plant rotary hoeing to reduce the need for multiple post-plant rotary hoeing. Pre-plant rotary hoe treatments included a weekly rotary hoeing four weeks before planting, two weeks before planting and none. Post-plant rotary hoe treatments consisted of zero, one, two, three, and four post-plant rotary hoe uses. Weed control was increased with pre-plant rotary hoeing at Plymouth in 2006 and 2007 but this effect disappeared with the first post-plant rotary hoeing. Multiple post-plant rotary hoe uses decreased soybean plant populations, decreased soybean canopy height, lowered soybean pod position and decreased soybean yield. In another experiment, the effect of soybean population on weed control was investigated. This research was conducted in 2006 and 2007 to investigate seeding rates of 185,000; 309,000; 432,000; and 556,000 live seeds/ha. All rates were planted on 76 cm row spacing in organic and conventional weed management systems. Increased soybean seeding rates reduced weed ratings at 3 of the 5 sites. Increased soybean seeding rates also resulted in higher yield at 3 of the 4 sites. Maximum economic returns for organic treatments were achieved with the highest seeding rate in all sites. In a separate experiment, the effect of soybean genotype on weed suppression was investigated. Twenty seven genotypes were chosen based on varying seed sizes, leaf shape, and height. Genotypes were compared in weedy and weed free conditions. Canopy traits and percent ground cover estimates were measured in weed free plots. Soybean and weed biomass has harvested at 7 weeks after emergence. Differences in.

Productivity of Soybean and Weed Dynamics as Influenced by Tillage and Weed Management Options

Author : Ali Monsefi
Publisher :
ISBN 13 :
Total Pages : 150 pages
Book Rating : 4.:/5 (854 download)

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Book Synopsis Productivity of Soybean and Weed Dynamics as Influenced by Tillage and Weed Management Options by : Ali Monsefi

Download or read book Productivity of Soybean and Weed Dynamics as Influenced by Tillage and Weed Management Options written by Ali Monsefi and published by . This book was released on 2009 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Weed-Crop Competition

Author : Robert L. Zimdahl
Publisher : John Wiley & Sons
ISBN 13 : 0470290102
Total Pages : 235 pages
Book Rating : 4.4/5 (72 download)

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Book Synopsis Weed-Crop Competition by : Robert L. Zimdahl

Download or read book Weed-Crop Competition written by Robert L. Zimdahl and published by John Wiley & Sons. This book was released on 2007-11-19 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the past 20 years, the first edition of this text has been widely cited as authoritative academic reference. The latest edition continues the tradition set by the original book, and covers weed science research that has been published since 1980. This book aims to reduce the instance of research duplication—saving scientists and supporting institutions time and money. Not only does the second edition of Weed Crop Competition review, summarize, and combine current research; it critiques the research as well. This text has the potential to accelerate advancements in weed crop competition, which remains an important factor that affects crop yields. Scientists in foreign countries where access to literature is often limited or nonexistent, will find the information in this text invaluable. Weed scientists, crop scientists, plant ecologists, sustainable agriculturists, and organic agriculturists will be well-pleased with this long overdue and much needed new editionWeed Crop Competition provides a unique reference that reviews, summarises and synthesizes the literature published concerning research on this topic. The first edition has been one of the most frequently cited sources in weed science for the past 20 years. The second edition covers the significant body of literature that has been published since 1980. Originally intended to survey existing research, the intent of the book is to reduce the instance of research duplication, thus saving scientists and their institutions time and money, and expediting advancements in weed crop competition, an important factor affecting crop yields. Scientists in foreign countries where access to the literature is often limited or non-existent, find the information an invaluable resource. This long overdue and much needed new edition rejuvenates the tradition set by the original book.

Soybean Physiology, Agronomy, and Utilization

Author : A.G. Norman
Publisher : Elsevier
ISBN 13 : 0323158757
Total Pages : 263 pages
Book Rating : 4.3/5 (231 download)

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Book Synopsis Soybean Physiology, Agronomy, and Utilization by : A.G. Norman

Download or read book Soybean Physiology, Agronomy, and Utilization written by A.G. Norman and published by Elsevier. This book was released on 2012-12-02 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean Physiology, Agronomy, and Utilization attempts to cover and treat in logical sequence the factors that contribute to the potential and versatility of soybeans. The soybean is a major crop plant in the United States. Based on the utilization of the bean, or products therefrom, a substantial soybean industry has also developed. Its uses, agricultural and industrial, primarily depend on the high content of both protein (ca. 40%) and oil (ca. 20%) in the bean. The book begins by discussing soybean production in the United States and worldwide; the uses and economics of soybean products; and the soybean in physiological research. It explains the growth and development of soybeans. It discusses the physiological processes responsible for assimilating the plant body from the environment, namely photosynthesis, nitrogen fixation, and nitrate reduction. Subsequent chapters examine the impact of environmental variables—such as light, temperature, water, wind, and pests—on soybean plant characteristics as well as soybean breeding, production, processing, and utilization.

Non-Chemical Weed Control

Author : Khawar Jabran
Publisher : Academic Press
ISBN 13 : 0128098821
Total Pages : 174 pages
Book Rating : 4.1/5 (28 download)

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Book Synopsis Non-Chemical Weed Control by : Khawar Jabran

Download or read book Non-Chemical Weed Control written by Khawar Jabran and published by Academic Press. This book was released on 2018-01-03 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-Chemical Weed Control is the first book to present an overview of plant crop protection against non-food plants using non-chemical means. Plants growing wild—particularly unwanted plants found in cultivated ground to the exclusion of the desired crop—have been treated with herbicides and chemical treatments in the past. As concern over environmental, food and consumer safety increases, research has turned to alternatives, including the use of cover crops, thermal treatments and biotechnology to reduce and eliminate unwanted plants. This book provides insight into existing and emerging alternative crop protection methods and includes lessons learned from past methodologies. As crop production resources decline while consumer concerns over safety increase, the effective control of weeds is imperative to insure the maximum possible levels of soil, sunlight and nutrients reach the crop plants. Allows reader to identify the most appropriate solution based on their individual use or case Provides researchers, students and growers with current concepts regarding the use of modern, environment-friendly weed control techniques Presents methods of weed management—an important part of integrated weed management in the future Exploits the knowledge gained from past sustainable weed management efforts

Cotton Production

Author : Khawar Jabran
Publisher : John Wiley & Sons
ISBN 13 : 1119385512
Total Pages : 435 pages
Book Rating : 4.1/5 (193 download)

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Book Synopsis Cotton Production by : Khawar Jabran

Download or read book Cotton Production written by Khawar Jabran and published by John Wiley & Sons. This book was released on 2019-08-05 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a comprehensive overview of the role of cotton in the economy and cotton production around the world This book offers a complete look at the world’s largest fiber crop: cotton. It examines its effect on the global economy—its uses and products, harvesting and processing, as well as the major challenges and their solutions, recent trends, and modern technologies involved in worldwide production of cotton. Cotton Production presents recent developments achieved by major cotton producing regions around the world, including China, India, USA, Pakistan, Turkey and Europe, South America, Central Asia, and Australia. In addition to origin and history, it discusses the recent advances in management practices, as well as the agronomic challenges and the solutions in the major cotton producing areas of the world. Keeping a focus on global context, the book provides sufficient details regarding the management of cotton crops. These details are not limited to the choice of cultivar, soil management, fertilizer and water management, pest control, cotton harvesting, and processing. The first book to cover all aspects of cotton production in a global context Details the role of cotton in the economy, the uses and products of cotton, and its harvesting and processing Discusses the current state of cotton management practices and issues within and around the world’s cotton producing areas Provides insight into the ways to improve cotton productivity in order to keep pace with the growing needs of an increasing population Cotton Production is an essential book for students taking courses in agronomy and cropping systems as well as a reference for agricultural advisors, extension specialists, and professionals throughout the industry.

Improving Weed Management and Crop Productivity in Maize Systems in Zimbabwe

Author : Arnold Bray Mashingaidze
Publisher :
ISBN 13 :
Total Pages : 216 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Improving Weed Management and Crop Productivity in Maize Systems in Zimbabwe by : Arnold Bray Mashingaidze

Download or read book Improving Weed Management and Crop Productivity in Maize Systems in Zimbabwe written by Arnold Bray Mashingaidze and published by . This book was released on 2004 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Span lang=EN-GB style='mso-ansi-language:EN-GB'It was concluded that cultural weed management techniques that enhance radiation capture by the crop were effective in suppressing weed growth and seed production and increasing crop yields and should be incorporated into smallholder farmer's production practices in a systematic manner as part of Integrated Weed Management and cropping system design.

Fundamentals of Weed Science

Author : Robert L Zimdahl
Publisher : Elsevier
ISBN 13 : 0443157243
Total Pages : 578 pages
Book Rating : 4.4/5 (431 download)

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Book Synopsis Fundamentals of Weed Science by : Robert L Zimdahl

Download or read book Fundamentals of Weed Science written by Robert L Zimdahl and published by Elsevier. This book was released on 2024-02-14 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Weed Science, Sixth Edition, places weed management in the context of weed research and science, presenting the latest advances in the role, control, and potential uses of weed plants. This book uses an ecological framework to explore the role of responsible and effective weed control in agriculture from the emergence and genetic foundation of weeds to the latest means of control and environmental effects. Fully revised, updated, and expanded, Fundamentals of Weed Science now includes insights into international trad eand consumer preferences, weed seedbanks, advancements in robotic weeding, weed flaming, and the potential of precision agriculture in weed science. • Includes an emphasis on herbicide resistance and molecular biology, both of which have come to dominate weed science research • Covers all traditional aspects of weed science as well as current research • Provides broad coverage, including relevant related subjects like weed ecology and weed population genetics

Soybean

Author : Hany El-Shemy
Publisher : BoD – Books on Demand
ISBN 13 : 9533075341
Total Pages : 502 pages
Book Rating : 4.5/5 (33 download)

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Book Synopsis Soybean by : Hany El-Shemy

Download or read book Soybean written by Hany El-Shemy and published by BoD – Books on Demand. This book was released on 2011-11-02 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: Worldwide, soybean seed proteins represent a major source of amino acids for human and animal nutrition. Soybean seeds are an important and economical source of protein in the diet of many developed and developing countries. Soy is a complete protein and soyfoods are rich in vitamins and minerals.Soybean protein provides all the essential amino acids in the amounts needed for human health. Recent research suggests that soy may also lower risk of prostate, colon and breast cancers as well as osteoporosis and other bone health problems and alleviate hot flashes associated with menopause. This volume is expected to be useful for student, researchers and public who are interested in soybean.

The Soybean

Author : Guriqbal Singh
Publisher : CABI
ISBN 13 : 1845936442
Total Pages : 506 pages
Book Rating : 4.8/5 (459 download)

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Book Synopsis The Soybean by : Guriqbal Singh

Download or read book The Soybean written by Guriqbal Singh and published by CABI. This book was released on 2010 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt: The soybean is a crop of global importance and is one of most frequently cultivated crops worldwide. It is rich in oil and protein, used for human and animal consumption as well as for industrial purposes. Soybean plants also play an important role in crop diversification and benefit the growth of other crops, adding nitrogen to the soil during crop rotation. With contributions from eminent researchers from around the world, The Soybean provides a concise coverage of all aspects of this important crop, including genetics and physiology, varietal improvement, production and protection technology, utilization and nutritional value.

Managing Cover Crops Profitably (3rd Ed. )

Author : Andy Clark
Publisher : DIANE Publishing
ISBN 13 : 1437903797
Total Pages : 248 pages
Book Rating : 4.4/5 (379 download)

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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.

Bibliography of Agriculture

Author :
Publisher :
ISBN 13 :
Total Pages : 1732 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Bibliography of Agriculture by :

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:

Food Security and Soil Quality

Author : Rattan Lal
Publisher : CRC Press
ISBN 13 : 1439800588
Total Pages : 434 pages
Book Rating : 4.4/5 (398 download)

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Book Synopsis Food Security and Soil Quality by : Rattan Lal

Download or read book Food Security and Soil Quality written by Rattan Lal and published by CRC Press. This book was released on 2010-06-23 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Just five years ago, it was generally believed that the number of food insecure people in the world was on continuous decline. Unfortunately, widespread soil degradation along with resistance to recommended agronomic practices, and little attempt to restore degraded soils have conspired with significant droughts (in regions that could least tolerat

Insect Bioecology and Nutrition for Integrated Pest Management

Author : Antonio Ricardo Panizzi
Publisher : CRC Press
ISBN 13 : 1439837090
Total Pages : 750 pages
Book Rating : 4.4/5 (398 download)

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Book Synopsis Insect Bioecology and Nutrition for Integrated Pest Management by : Antonio Ricardo Panizzi

Download or read book Insect Bioecology and Nutrition for Integrated Pest Management written by Antonio Ricardo Panizzi and published by CRC Press. This book was released on 2012-03-08 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of insect nutritional ecology has been defined by how insects deal with nutritional and non-nutritional compounds, and how these compounds influence their biology in evolutionary time. In contrast, Insect Bioecology and Nutrition for Integrated Pest Management presents these entomological concepts within the framework of integrated pest m

Steel in the Field

Author : Greg Bowman
Publisher :
ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.:/5 (89 download)

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Book Synopsis Steel in the Field by : Greg Bowman

Download or read book Steel in the Field written by Greg Bowman and published by . This book was released on 1997 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ecological Management of Agricultural Weeds

Author : Matt Liebman
Publisher : Cambridge University Press
ISBN 13 : 1139427245
Total Pages : 546 pages
Book Rating : 4.1/5 (394 download)

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Book Synopsis Ecological Management of Agricultural Weeds by : Matt Liebman

Download or read book Ecological Management of Agricultural Weeds written by Matt Liebman and published by Cambridge University Press. This book was released on 2001-07-19 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents principles and practices for ecologically based weed management in a wide range of temperate and tropical farming systems. Special attention is given to the evolutionary challenges that weeds pose and the roles that farmers can play in the development of new weed-management strategies.