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Remote Sensing Of Leaf Tissue Nitrogen Content And Disease Severity In Creeping Bentgrass And Annual Bluegrass Using Near Infrared Spectroscopy
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Book Synopsis Remote Sensing of Leaf Tissue Nitrogen Content and Disease Severity in Creeping Bentgrass and Annual Bluegrass Using Near Infrared Spectroscopy by : Geoffrey Jordan Rinehart
Download or read book Remote Sensing of Leaf Tissue Nitrogen Content and Disease Severity in Creeping Bentgrass and Annual Bluegrass Using Near Infrared Spectroscopy written by Geoffrey Jordan Rinehart and published by . This book was released on 2000 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Prediction of Available Water in Creeping Bentgrass and Annual Bluegrass Using Visible and Near Infrared Spectroscopy by : Beau James McSparin
Download or read book Prediction of Available Water in Creeping Bentgrass and Annual Bluegrass Using Visible and Near Infrared Spectroscopy written by Beau James McSparin and published by . This book was released on 2000 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Nutrient Management and Soil PH on Anthracnose Severity of Annual Bluegrass Putting Green Turf by : Charles J. Schmid
Download or read book Influence of Nutrient Management and Soil PH on Anthracnose Severity of Annual Bluegrass Putting Green Turf written by Charles J. Schmid and published by . This book was released on 2016 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anthracnose (Colletotrichum cereale Manns sensu lato Crouch, Clarke, and Hillman) is a fungal disease of annual bluegrass [Poa annua L. f. reptans (Hausskn) T. Koyama; ABG] turf, which can be intensified when abiotic conditions weaken turfgrass plants. Five field trials conducted from 2009 to 2015 evaluated the effects of N program, soluble N rate, N source, K source and rate, and soil pH on anthracnose severity of ABG maintained as putting green turf. Soluble N rate applied during midseason had the greatest influence on anthracnose severity. Granular N rate and season in which the majority of granular N was applied also influenced disease severity but to a lesser extent. Soluble N applied at 73 kg N ha-1 yr-1 in combination with moderate rates (147 or 220 kg N ha-1 yr-1) of granular N applied during the spring resulted in the greatest reduction in disease severity. Further analysis of the influence of soluble N rate on anthracnose severity found that higher rates (14.6 to 24.4 kg N ha-1 wk-1) of soluble N can be applied from late-spring through early-summer to reduce disease severity, but as the summer progresses moderate (9.8 kg N ha-1 wk-1) to low (4.9 kg N ha-1 wk-1) rates of soluble N should be applied to avoid excessive rates of N increasing disease severity. Playability (i.e. ball roll distance) of ABG turf was reduced by rates of soluble N applied at e"14.6 kg ha-1 wk-1 compared to N applied at 4.9 kg ha-1 wk-1 . Basic N sources (potassium nitrate and calcium nitrate) applied at 4.9 kg N ha-1 every 7-d reduced disease severity compared acidic N sources (ammonium nitrate and ammonium sulfate) applied at the same rate and frequency; however, when N was applied at 4.9 kg ha-1 every 14-d, disease severity was greater and few differences were seen among N sources. Potassium (K) fertilization reduced anthracnose severity regardless of K rate or K source. Critical soil K and leaf K concentration values affecting anthracnose severity were calculated to range from 43 to 70 mg kg-1 (Mehlich 3) and 19.3 to 23.1 g kg-1, respectively, using nonlinear regression models (Cate-Nelson, linear plateau, and quadratic plateau). Plots with moderately acidic soil (pH
Book Synopsis Soluble Silicon Impact on Growth and Disease Severity of Creeping Bentgrass (Agrostis Palustris Huds.) Seedlings Grown in Sand by : Eva Gussack
Download or read book Soluble Silicon Impact on Growth and Disease Severity of Creeping Bentgrass (Agrostis Palustris Huds.) Seedlings Grown in Sand written by Eva Gussack and published by . This book was released on 1997 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Species Dominance in Mixed Stands of Creeping Bentgrass and Annual Bluegrass by : Roch Edmund Gaussoin
Download or read book Species Dominance in Mixed Stands of Creeping Bentgrass and Annual Bluegrass written by Roch Edmund Gaussoin and published by . This book was released on 1988 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phytohormones Associated with a Bacterial Disease of Creeping Bentgrass (Agrostis Stolonifera L.) Caused by Acidovorax Avenae Subsp. Avena by : Sha Liu
Download or read book Phytohormones Associated with a Bacterial Disease of Creeping Bentgrass (Agrostis Stolonifera L.) Caused by Acidovorax Avenae Subsp. Avena written by Sha Liu and published by . This book was released on 2016 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Influence of Phosphorus and Nitrogen on Annual Bluegrass Encroachment in a Creeping Bentgrass Putting Green by : Robert Raley
Download or read book Influence of Phosphorus and Nitrogen on Annual Bluegrass Encroachment in a Creeping Bentgrass Putting Green written by Robert Raley and published by . This book was released on 2012 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Turfgrass: Science and Culture by : James B Beard
Download or read book Turfgrass: Science and Culture written by James B Beard and published by Prentice Hall. This book was released on 1972 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt: A classic and best-selling text for sod and turfgrass courses covering lawnkeeping and athletic groundskeeping.
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
Book Synopsis The Effect of Potassium Fertilization on Psychrophilic Pathogen Susceptibility and Carbon Metabolism of Annual Bluegrass by : David Ramsay Moody
Download or read book The Effect of Potassium Fertilization on Psychrophilic Pathogen Susceptibility and Carbon Metabolism of Annual Bluegrass written by David Ramsay Moody and published by . This book was released on 2011 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Typhula incarnata (GSM) and Microdochium nivale (PSM) are important psychrophilic pathogens of cool-season turfgrasses. Existing field data suggests that K fertilization may affect disease severity, warranting additional experimentation under controlled conditions. Overwintering carbon metabolism of perennial grasses is known to affect their performance and utility. While there is some evidence that plant K status influences winter survival, the physiological basis is unclear. The goal of this project was to determine the effect of K fertilization on carbon metabolism of overwintering annual bluegrass [Poa annua var. reptans (Hauskn) Timm.] and its relationship to psychrophilic pathogen susceptibility. In a greenhouse, annual bluegrass was seeded into 30 x 10 cm diam. sand filled columns. Nitrogen (0.5 g m2), K (0.5 g m2), and all other plant essential nutrients were applied weekly for 90 d. Following establishment, weekly application rates of N and other essential nutrients remained constant, yet five different K treatments (0, 0.25, 0.5, 2, 3 g m-2) were imposed for 90 d. Columns were then moved to a refrigerated room, maintained under a photosynthetically active radiation flux of ~300 [MICRO SIGN]mol m-2 s-1, and day/night air temperature incrementally decreased every 7 d over four weeks (10/4°C, 4/-2°C, 2/-4°C, -2/-6°C). Plants were then buried under 10 cm of snow and kept under darkness at -4°C for 28 d. After thawing at 2°C, eight replicates of each K treatment were inoculated with a 5 mm agar disc taken from GSM, PSM, or sterile cultures. Columns were incubated at 2°C (40 d) then 4°C (40 d) under periodic misting and evaluated for % necrotic turf every 10 d. Survival analysis of days to 50% infection (LI50) was used to quantify disease progression. Tissue harvested following each experimental phase was analyzed for nonacid cations, nonstructural carbohydrates, and several organic acids using gas chromatography-mass spectrometry. The experiment was conducted twice and data was pooled. Potassium treatment significantly affected LI50 in GSM (Pr>[chi]2 =0.007) but not PSM (Pr>[chi]2 =0.277) inoculated turf. While specific mechanisms remain unclear, several biochemical parameters (K, Ca, organic acid content) associated with GSM and PSM severity were impacted by K fertilization rate. In contrast to existing literature, nonstructural carbohydrate dynamics were not strongly correlated with disease severity. Disease recovery was significantly slower for PSM inoculated turf than GSM inoculated turf. Tissue K content and cation:anion ratios increased with K fertilization rate. Overall K fertilization had a minimal impact on non-structural carbohydrate dynamics. Tissue organic acid content, particularly malate and citrate, markedly increased at greater K fertilization rates. The results of this study suggest that K fertilization significantly increases diversion of carbon resources to organic acid synthesis due to perturbations in charge and pH homeostasis associated with disparate cation/anion uptake ratios. In addition to affecting plant utility, there is a biochemical cost associated with luxury K uptake and subsequent organic acid accumulation.
Book Synopsis Toward Sustainable Agricultural Systems in the 21st Century by : National Research Council
Download or read book Toward Sustainable Agricultural Systems in the 21st Century written by National Research Council and published by National Academies Press. This book was released on 2010-07-25 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last 20 years, there has been a remarkable emergence of innovations and technological advances that are generating promising changes and opportunities for sustainable agriculture, yet at the same time the agricultural sector worldwide faces numerous daunting challenges. Not only is the agricultural sector expected to produce adequate food, fiber, and feed, and contribute to biofuels to meet the needs of a rising global population, it is expected to do so under increasingly scarce natural resources and climate change. Growing awareness of the unintended impacts associated with some agricultural production practices has led to heightened societal expectations for improved environmental, community, labor, and animal welfare standards in agriculture. Toward Sustainable Agricultural Systems in the 21st Century assesses the scientific evidence for the strengths and weaknesses of different production, marketing, and policy approaches for improving and reducing the costs and unintended consequences of agricultural production. It discusses the principles underlying farming systems and practices that could improve the sustainability. It also explores how those lessons learned could be applied to agriculture in different regional and international settings, with an emphasis on sub-Saharan Africa. By focusing on a systems approach to improving the sustainability of U.S. agriculture, this book can have a profound impact on the development and implementation of sustainable farming systems. Toward Sustainable Agricultural Systems in the 21st Century serves as a valuable resource for policy makers, farmers, experts in food production and agribusiness, and federal regulatory agencies.
Book Synopsis Beneficial Co-Utilization of Agricultural, Municipal and Industrial by-Products by : Sally L. Brown
Download or read book Beneficial Co-Utilization of Agricultural, Municipal and Industrial by-Products written by Sally L. Brown and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: Co-utilization or blending of residuals offers a unique opportunity to develop products with particular characteristics that are able to target specific customer needs. The very notion of deliberately blending by-products suggests that the recycling and beneficial reuse industries are taking a quantitative step forward towards developing products rather than simply reusing residuals. At the same time that this step provides unique opportunities, it also presents unique challenges. The science associated with the beneficial use of one product may not apply when that product is mixed with another residual. Blending of materials may alter the chemistry of the components of the mixture. This may offer additional benefits, as in the case of disease suppression in composts, or present unexpected problems, as the use of lime-stabilized biosolids has done in Maryland. This book consists of the proceedings of the Beltsville Symposium. The organizers of the Symposium attempted to structure a meeting that would outline both the potential benefits of co-utilization as well as concerns. The editors have divided the proceedings into sections that describe the practical basis for co-utilization of residuals as well as the potential benefits. Specific considerations are described. Finally, case studies include descriptions of successful operations and data that detail results of research involving co-utilization materials. Blending of materials for specific objectives needs to be the focus of any successful co-utilization effort. The scientific implications of the mix need to be determined before a product can be used properly.
Book Synopsis Combined Stresses in Plants by : Ramamurthy Mahalingam
Download or read book Combined Stresses in Plants written by Ramamurthy Mahalingam and published by Springer. This book was released on 2014-12-05 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: The unique responses of plants to combined stresses have been observed at physiological, biochemical, and molecular levels. This book provides an analysis of all three levels of change in various plants in response to different combinations of stresses. The text provides a general review of the combined stress paradigm, focuses on the impact of higher CO2 levels in combination with other stresses, examines drought stress in conjunction with other abiotic factors in different crop plants as well as the combination of biotic and abiotic factors, and discusses the impact of combined stresses in forest ecosystems. Written by experts in the field, Combined Stresses in Plants: Physiological, Molecular, and Biochemical Aspects is a valuable resource for scientists, graduate students, and post-doctoral fellows alike working in plant stresses.
Book Synopsis The Sustainability of Agro-Food and Natural Resource Systems in the Mediterranean Basin by : Antonella Vastola
Download or read book The Sustainability of Agro-Food and Natural Resource Systems in the Mediterranean Basin written by Antonella Vastola and published by Springer. This book was released on 2015-04-24 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is focused on the challenges to implement sustainability in diverse contexts such as agribusiness, natural resource systems and new technologies. The experiences made by the researchers of the School of Agricultural, Forestry, Food and Environmental Science (SAFE) of the University of Basilicata offer a wide and multidisciplinary approach to the identification and testing of different solutions tailored to the economic, social and environmental characteristics of the region and the surrounding areas. Basilicata’s productive system is mainly based on activities related to the agricultural sector and exploitation of natural resources but it has seen, in recent years, an industrial development driven by the discovery of oil fields. SAFE research took up the challenge posed by market competition to create value through the sustainable use of renewable and non-renewable resources of the territory. Moreover, due to its unique geographical position in the middle of the Mediterranean basin, Basilicata is an excellent “open sky” laboratory for testing sustainable solutions adaptable to other Mediterranean areas. This collection of multidisciplinary case studies and research experiences from SAFE researchers and their scientific partners is a stimulating contribution to the debate on the development of sustainable techniques, methods and applications for the Mediterranean regions.
Download or read book Plant Breeding Reviews written by and published by John Wiley & Sons. This book was released on 2020-11-05 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ecological Responses to the 1980 Eruption of Mount St. Helens by : Virginia H. Dale
Download or read book Ecological Responses to the 1980 Eruption of Mount St. Helens written by Virginia H. Dale and published by Springer Science & Business Media. This book was released on 2006-01-16 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1980 eruption of Mount St. Helens caused tragic loss of life and property, but also created a unique opportunity to study a huge disturbance of natural systems and their subsequent responses. This book synthesizes 25 years of ecological research into of volcanic activity, and shows what actually happens when a volcano erupts, what the immediate and long-term dangers are, and how life reasserts itself in the environment.
Book Synopsis Improvement of Crops in the Era of Climatic Changes by : Parvaiz Ahmad
Download or read book Improvement of Crops in the Era of Climatic Changes written by Parvaiz Ahmad and published by Springer. This book was released on 2014-07-28 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abiotic stress drastically limits agricultural crop productivity worldwide. Climate change threatens the sustainable agriculture with its rapid and unpredictable effects, making it difficult for agriculturists and farmers to respond to the challenges cropping up from environmental stresses. In light of population growth and climate changes, investment in agriculture is the only way to avert wide scale food shortages. This challenge comes at a time when plant sciences are witnessing remarkable progress in understanding the fundamental processes of plant growth and development. Plant researchers have identified genes controlling different aspects of plant growth and development, but many challenges still exist in creating an apt infrastructure, access to bioinformatics and good crop results. Improvement of Crops in the Era of Climatic Changes, Volume 2 focuses on many existing opportunities that can be applied methodically through conventional breeding, without touching upon the latest discoveries such as the power of genomics to applied breeding in plant biology. Written by a diverse faction of internationally famed scholars, this volume adds new horizons in the field of crop improvement, genetic engineering and abiotic stress tolerance. Comprehensive and lavishly illustrated, Improvement of Crops in the Era of Climatic Changes, Volume 2 is a state-of-the-art guide to recent developments vis-à-vis various aspects of plant responses in molecular and biochemical ways to create strong yields and overall crop improvement.
