Download or read book Efficient Nitrogen Fertility and Drip Irrigation Management in Commercial Lettuce and Celery Production written by Shane Joseph Breschini and published by . This book was released on 2001 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Irrigation nitrogen Management Practices for Celery written by Jeffrey Clayton Stark and published by . This book was released on 1981 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nitrogen Management and Water Quality Protection in California Lettuce and Strawberry Production written by Thomas Glenn Bottoms and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Intensive production of horticultural crops in the Salinas Valley of California has contributed to NO3-N pollution of surface water and groundwater in this region; NO3-N in excess of the 10 mg L−1 Federal drinking water standard is common. Nitrogen dynamics in lettuce and strawberry production were studied using both commercial field surveys and replicated fertilization trials, with the objective of identifying production practices that protect environmental water quality. Additionally, wood-chip denitrification bioreactors were evaluated as a method of removing NO3-N from surface runoff and tile drain effluent from horticultural fields. In lettuce production the use of presidedress soil nitrate testing to guide in-season N fertilization was evaluated. Delaying N application when root zone soil NO3-N was > 20 mg kg−1 was found to be a safe and effective practice that maintained peak crop productivity while minimizing environmental N loading. While leaf N and midrib NO3-N monitoring may indicate the adequacy of N fertility, those plant-based measures were not correlated with concurrently measured soil NO3-N and therefore were of minimal use in identifying fields in which N fertilization could be postponed. Strawberry crop N uptake showed a consistent pattern across fields, with limited uptake from fall transplanting through March, followed by a consistent uptake of approximately 1.1 kg ha−1 d−1 N through the rest of the production season. Mean seasonal N uptake was estimated at 220 kg ha−1. Monitoring of strawberry fields revealed a wide range of seasonal N fertilization rates and irrigation volumes, but neither N rate nor irrigation volume was correlated with seasonal fruit yield. The potential for NO3-N leaching from the root zone was higher over the winter than during the main irrigation season (May-September). Preplant application of >100 kg ha−1 N in the form of controlled release fertilizer, a common grower practice, was shown to be highly inefficient. Strawberry leaf nutrient optimum levels were reevaluated using the Diagnosis and Recommendation Integrated System (DRIS) approach. The DRIS optimum leaf N concentration range was lower than existing sufficiency standards. Wood-chip denitrification bioreactors consistently removed NO3-N from surface runoff and tile drain effluent. Denitrification rates achieved ranged from approximately 5-11 mg L−1 N removal per day of residence time in the bioreactor, depending on water temperature. Both management practice modifications to limit N loading, and some method of wastewater remediation, will undoubtedly be required to approach a 10 mg L−1 NO3-N environmental water quality standard.
Download or read book Good Agricultural Practices for Greenhouse Vegetable Crops written by and published by Food & Agriculture Organization of the UN (FAO). This book was released on 2013 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication capitalizes on the experience of scientists from the North Africa and Near East countries, in collaboration with experts from around the world, specialized in the different aspects of greenhouse crop production. It provides a comprehensive description and assessment of the greenhouse production practices in use in Mediterranean climate areas that have helped diversify vegetable production and increase productivity. The publication is also meant to be used as a reference and tool for trainers and growers as well as other actors in the greenhouse vegetables value chain in this region.
Download or read book Handbook of Plant Nutrition written by Allen V. Barker and published by CRC Press. This book was released on 2016-04-19 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt: The burgeoning demand on the world food supply, coupled with concern over the use of chemical fertilizers, has led to an accelerated interest in the practice of precision agriculture. This practice involves the careful control and monitoring of plant nutrition to maximize the rate of growth and yield of crops, as well as their nutritional value.
Download or read book Guideline for Salinity Assessment Mitigation and Adaptation Using Nuclear and Related Techniques written by Mohammad Zaman and published by Springer. This book was released on 2018-11-28 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book is an outcome of the collaboration between the Soil and Water Management & Crop Nutrition Section, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Department of Nuclear Sciences and Applications, International Atomic Energy Agency (IAEA), Vienna, Austria, and Dr. Shabbir A Shahid, Senior Salinity Management Expert, Freelancer based in United Arab Emirates.The objective of this book is to develop protocols for salinity and sodicity assessment and develop mitigation and adaptation measures to use saline and sodic soils sustainably. The focus is on important issues related to salinity and sodicity and to describe these in an easy and user friendly way. The information has been compiled from the latest published literature and from the authors’ publications specific to the subject matter. The book consists of six chapters. Chapter 1 introduces the terms salinity and sodicity and describes various salinity classification systems commonly used around the world. Chapter 2 reviews global distribution of salinization and socioeconomic aspects related to salinity and crop production. Chapters 3 covers comprehensively salinity and sodicity adaptation and mitigation options including physical, chemical, hydrological and biological methods. Chapter 4 discusses the efforts that have been made to demonstrate the development of soil salinity zones under different irrigation systems. Chapter 5 discusses the quality of irrigation water, boron toxicity and relative tolerance to boron, the effects of chlorides on crops. Chapter 6 introduces the role of nuclear techniques in saline agriculture.
Download or read book International Business Concepts Methodologies Tools and Applications written by Management Association, Information Resources and published by IGI Global. This book was released on 2016-03-17 with total page 2441 pages. Available in PDF, EPUB and Kindle. Book excerpt: Business transactions and partnerships across borders have become easier than ever due to globalization and global digital connectivity. As part of this shift in the business sphere, managers, executives, and strategists across industries must acclimate themselves with the challenges and opportunities for conducting business globally. International Business: Concepts, Methodologies, Tools, and Applications presents the latest research innovations focusing on cross-cultural communications and training, international relations, multinational enterprises, outsourcing, international business strategies, and competitive advantage in the global marketplace. This publication is an exhaustive multi-volume work essential to academic and corporate libraries who serve researchers, scholars, business executives and professionals, and graduate-level business students.
Download or read book Group Growers written by and published by . This book was released on 1988 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Accumulation of Nitrate written by and published by National Academies. This book was released on 1972-01-01 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen compartments in the Biosphere; Sources of nitrogen; Fertilizer and soil nitrogen; Hazards of nitrate; Nitrite, and Nitrosamines to man and Livestock; Eutro[hication.
Download or read book Sustainable Market Farming written by Pam Dawling and published by New Society Publishers. This book was released on 2013-02-01 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: Growing for 100 - the complete year-round guide for the small-scale market grower. Across North America, an agricultural renaissance is unfolding. A growing number of market gardeners are emerging to feed our appetite for organic, regional produce. But most of the available resources on food production are aimed at the backyard or hobby gardener who wants to supplement their family's diet with a few homegrown fruits and vegetables. Targeted at serious growers in every climate zone, Sustainable Market Farming is a comprehensive manual for small-scale farmers raising organic crops sustainably on a few acres. Informed by the author's extensive experience growing a wide variety of fresh, organic vegetables and fruit to feed the approximately one hundred members of Twin Oaks Community in central Virginia, this practical guide provides: Detailed profiles of a full range of crops, addressing sowing, cultivation, rotation, succession, common pests and diseases, and harvest and storage Information about new, efficient techniques, season extension, and disease resistant varieties Farm-specific business skills to help ensure a successful, profitable enterprise Whether you are a beginning market grower or an established enterprise seeking to improve your skills, Sustainable Market Farming is an invaluable resource and a timely book for the maturing local agriculture movement.
Download or read book Guidelines for Predicting Crop Water Requirements written by J. Doorenbos and published by . This book was released on 1975 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calculation of crop evapotranspiration; Selection of crop coeficient; Calculation of field irrigation requirements.
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1990 with total page 1254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Small scale Aquaponic Food Production written by Christopher Somerville and published by Fao. This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This technical paper begins by introducing the concept of aquaponics, including a brief history of its development and its place within the larger category of soil-less culture and modern agriculture. It discusses the main theoretical concepts of aquaponics, including the nitrogen cycle and the nitrification process, the role of bacteria, and the concept of balancing an aquaponic unit. It then moves on to cover important considerations of water quality parameters, water testing, and water sourcing for aquaponics, as well as methods and theories of unit design, including the three main methods of aquaponic systems: media beds, nutrient film technique, and deep water culture. The publication discusses in detail the three groups of living organisms (bacteria, plants and fish) that make up the aquaponic ecosystem. It also presents management strategies and troubleshooting practices, as well as related topics, specifically highlighting local and sustainable sources of aquaponic inputs. The publication also includes nine appendixes that present other key topics: ideal conditions for common plants grown in aquaponics; chemical and biological controls of common pests and diseases including a compatible planting guide; common fish diseases and related symptoms, causes and remedies; tools to calculate the ammonia produced and biofiltration media required for a certain fish stocking density and amount of fish feed added; production of homemade fish feed; guidelines and considerations for establishing aquaponic units; a cost-benefit analysis of a small-scale, media bed aquaponic unit; a comprehensive guide to building small-scale versions of each of the three aquaponic methods; and a brief summary of this publication designed as a supplemental handout for outreach, extension and education.
Download or read book Water Quality for Agriculture written by R. S. Ayers and published by . This book was released on 1985 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Richtlijnen voor de werker in het veld om problemen te ondervangen ten aanzien van de waterkwaliteit voor irrigatie-doeleinden. Tenslotte worden praktijkervaringen uit diverse gebieden vermeld
Download or read book Nutrient Use Efficiency in Plants written by Malcolm J. Hawkesford and published by Springer. This book was released on 2014-11-14 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nutrient Use Efficiency in Plants: Concepts and Approaches is the ninth volume in the Plant Ecophysiology series. It presents a broad overview of topics related to improvement of nutrient use efficiency of crops. Nutrient use efficiency (NUE) is a measure of how well plants use the available mineral nutrients. It can be defined as yield (biomass) per unit input (fertilizer, nutrient content). NUE is a complex trait: it depends on the ability to take up the nutrients from the soil, but also on transport, storage, mobilization, usage within the plant, and even on the environment. NUE is of particular interest as a major target for crop improvement. Improvement of NUE is an essential pre-requisite for expansion of crop production into marginal lands with low nutrient availability but also a way to reduce use of inorganic fertilizer.
Download or read book Fertilizer Analyses written by Robert Clark Kedzie and published by . This book was released on 1891 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Use of Saline Waters for Crop Production written by J. D. Rhoades and published by Artabras. This book was released on 1992 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
