Nitrogen and Water Management in Organic Vegetable Production in California PDF Download
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Author: Sajeemas Pasakdee
Publisher:
ISBN:
Category :
Languages : en
Pages : 272
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Book Description
Author: Sajeemas Pasakdee
Publisher:
ISBN:
Category :
Languages : en
Pages : 272
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Book Description
Author: Katie Lenore Monsen
Publisher:
ISBN:
Category : Organic farming
Languages : en
Pages : 302
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Book Description
Author: Timothy K. Hartz
Publisher: UCANR Publications
ISBN: 1627110704
Category : Technology & Engineering
Languages : en
Pages : 112
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Book Description
With growers now facing increasingly stringent regulations designed to minimize nutrient losses to the environment, this guide outlines a fresh take on fertilization best practices for the industry. Nutrient management is critical to successful vegetable production. Given the high value and exacting market standards for size, appearance, and postharvest quality for vegetable crops, fertilizer management practices have focused on optimizing production across a wide range of field conditions. While effective in producing good crops, these practices are not necessarily reflective of input costs or environmental protection. Drawing on 25 years of industry experience, the author outlines the principles of nutrient management that are broadly applicable across crops and production regions. Growers, PCAs, and fertilizer industry professionals will find a practical understanding of crop nutrient requirements, soil nutrient availability, the value and limitations of soil and plant nutrient monitoring, and environmental protection in these pages.
Author:
Publisher:
ISBN:
Category : Coastal plants
Languages : en
Pages : 70
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Book Description
Author: Thomas P. Tomich
Publisher: Univ of California Press
ISBN: 0520962230
Category : Science
Languages : en
Pages : 341
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Book Description
Nitrogen is indispensable to all life on Earth. However, humans now dominate the nitrogen cycle, and nitrogen emissions from human activity have real costs: water and air pollution, climate change, and detrimental effects on human health, biodiversity, and natural habitats. Too little nitrogen limits ecosystem processes, while too much nitrogen transforms ecosystems profoundly. The California Nitrogen Assessment is the first comprehensive account of nitrogen flows, practices, and policies for California, encompassing all nitrogen flows—not just those associated with agriculture—and their impacts on ecosystem services and human wellbeing. How California handles nitrogen issues will be of interest nationally and internationally, and the goal of the assessment is to link science with action and to produce information that affects both future policy and solutions for addressing nitrogen pollution. This book also provides a model for application of integrated ecosystem assessment methods at regional and state (subnational) levels.
Author: Thomas P. Tomich
Publisher: Univ of California Press
ISBN: 0520287126
Category : Nature
Languages : en
Pages : 340
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Book Description
"Collaborating Institutions: Agricultural Sustainability Institute at UC Davis, UC ANR Sustainable Agriculture Research and Education Program, UC ANR Kearney Foundation of Soil Science, UC ANR Agricultural Issues Center, UC ANR California Institute for Water Resources, Water Science and Policy Center at UC Riverside."
Author: Richard Smith (University of California Cooperative Extension Advisor)
Publisher: University of California Agriculture and Natural Resources
ISBN: 1601076797
Category : Technology & Engineering
Languages : en
Pages : 99
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Book Description
The handbook describes primary cover crop species, including grasses, legumes, mustards and other cool-season and warm-season options. Photos, seeding details, winter vigor descriptions, nitrogen fixation and scavenging, weed suppression and nematode resistance are included for each species. In addition to assisting with crop selection, this handbook addresses the effects of cover cropping on water management, pest management and farm economics. For California growers, the handbook also discusses differences in cover crop use for the Central Valley, Desert and Coastal regions. Chapters include: Botany and Species Selection Agricultural Soil Ecology Water Management and Impacts on Water Quality Soil Nitrogen Fertility Management Weeds Soilborne Pathogens
Author: Sebastian Jesus Castro Bustamante
Publisher:
ISBN: 9781321608144
Category :
Languages : en
Pages :
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Book Description
Organic processing tomato production is a significant industry in California, yet little nitrogen fertility research is available to guide N management practices. Nitrogen is often the most limiting nutrient in organic vegetable production systems, especially in high-N demand crops like tomato. A total of 37 certified organic processing tomato fields in the Sacramento Valley of California were monitored during the 2012 and 2013 production seasons, with two objectives: 1) to document current N management practices in organic tomato production; and 2) to investigate the utility of early-season soil and plant N monitoring techniques in predicting seasonal crop N sufficiency, and the need for in-season N fertilization. Between approximately 3-11 weeks after transplanting (WAT) soil mineral N (SMN), leaf N and petiole NO3-N were determined every other week. In 22 fields whole plant N concentration at approximately 11 WAT was determined as a measure of crop N sufficiency. Growers were surveyed regarding N management practices used and fruit yields achieved. Soil N mineralization potential was estimated by aerobic laboratory incubation (28 days at 25 °C) for 20 of these fields. Carbon mineralization in the 24 hour period following rewetting of dried soil (C[subscript min]) and water extractable organic nitrogen (WEON) and carbon (WEOC) were also determined and evaluated as predictors of N mineralization potential. N management was primarily based on the application of manure or manure compost, which was applied in 29 fields in the fall and 2 fields in the spring. Organic fertilizers (feather meal, fish byproducts, guano, etc.) were applied to 2 fields in the fall, 14 fields in the spring before tomato transplanting and 11 fields post-transplanting. An overwinter cover crop was grown in only one field prior to tomato planting. SMN in the top 60 cm at 3 WAT ranged from 6-32 mg kg−1, averaging 16 mg kg−1. Apparent late-season N limitation was common at 11 WAT, with 30% of fields having leaf N below established sufficiency standards, and 36% of fields having whole plant N concentration below the established whole plant critical N concentration. Sensitivity analysis showed that SMN between 10-15 mg kg−1 (whether measured at 0-30 or 0-60 cm) correctly predicted late-season plant N status (sufficiency/ deficiency) in 60-80% of fields; fields below this SMN range were likely to become N-deficient, while those above this range were likely to remain N-sufficient. Leaf N at 5 WAT between 42-50 g kg−1 correctly predicted late season plant N status in approximately 70% of fields. Petiole NO3-N was a less useful diagnostic. Net soil N mineralization after 28 days (N[subscript min28]) ranged from 8-31 mg kg−1, representing an average of 2% of total soil N. Correlation of N[subscript min28] to C[subscript min] was weak (r = 0.44, p = 0.051) while stronger correlations were observed between N[subscript min28] and WEOC, WEON and total soil N (r = 0.63, 0.61 and 0.51, respectively, all p
Author: Donald Merhaut
Publisher: UCANR Publications
ISBN: 1601079834
Category : Technology & Engineering
Languages : en
Pages : 330
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Book Description
This user-friendly, practical guide was written for large and small greenhouse producers of containerized crops throughout the United States and all climates of North America. Inside you’ll find a thorough overview of plant nutrition and water quality. Originally associated with floriculture crops and “out-of-season” vegetable production, greenhouse production has experienced a recent sea change: new marketing trends, organic production, improved and more efficient production technologies, and the introduction of new laws and regulations related to environmental sustainability and food safety. To be successful, professional growers need to be equipped with a comprehensive understanding of greenhouse management today. Written by industry-based professionals and academics, its seventeen chapters demonstrate how water, root media, and fertilizer are integrated to optimize plant health, production efficiency, and the sustainability of resources and the environment.
Author: California. Department of Food and Agriculture. Fertilizer Research and Education Program. Conference
Publisher:
ISBN:
Category : Fertilizers
Languages : en
Pages : 136
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Book Description
