Download or read book Evaluation of Water and Nitrogen Management Practices in Southern US Rice Oryza Sativa L Production written by Richard Lee Atwill and published by . This book was released on 2015 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen (N) fertility and irrigation costs are the greatest input expenses required for rice production in Mississippi, therefore N management and irrigation should be conducted in efficiently. Field experiments were conducted at the Delta Research and Extension Center in Stoneville, MS, and the LSU AgCenter in Crowley, LA, to evaluate water and nitrogen management practices. Nitrogen use efficiency and yield were not different for alternate wetting and drying (AWD) systems compared to a traditional continuous flood. Additionally, experiments were conducted to test for differences comparing two experimental designs, randomized complete block (RCB) and split-plot (SP), for N-rate response trials in Mississippi. Rice grain yield response to N-rate was similar for RCB and SP designs, therefore either experimental design would be appropriate for N-response experiments in rice. Increasing efficiency of water and N management practices further improves environmental and economic benefits from rice production in Mississippi

Download or read book Water and Nitrogen Management Effects on Rice Oryza Sativa L Root and Shoot Development Nutrient Composition and Grain Yield written by Brandon Clay Grigg and published by . This book was released on 1991 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Irrigation and Nutrient Management Strategies in Rice Using Alternative Irrigation Methods written by Justin Chlapecka and published by . This book was released on 2021 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: As water resources gain value across the Mid-South, alternative irrigation strategies of rice (Oryza sativa L.) have garnered increasing attention. In 2015, an estimated 1.7% of Arkansas rice hectarage used alternate wetting and drying (AWD) irrigation and 0.9% used furrow irrigation. As of 2020, 2.5% used AWD and 16.9% used furrow irrigation, the latter accounting for near 99,000 ha in Arkansas. Little information exists in the scientific literature in relation to management of rice grown in the Mid-South without a conventional flood. This fact coupled with the rapid adoption rate, especially for furrow-irrigated rice (FIR), during the last five years prompted the need for additional scientific information. Studies were initiated from 2018 through 2020 to examine several management differences under alternative irrigation strategies, including irrigation timing, fertilizer-nitrogen (N) management, and nutrient uptake surveys. Large block trials were conducted in 2018 and 2019 to assess the proper irrigation timing for AWD and FIR at a total of four site-years per irrigation method. Small-plot trials were conducted in the top (aerobic) and bottom (generally flooded, anaerobic) of FIR fields from 2018 to 2020 at thirteen sites to determine the optimum N management program for FIR on clayey and silt loam soils. From these small-plot trials, aboveground biomass samples were taken at R3 (50% heading) to analyze the nutrient uptake including N, phosphorus (P), potassium (K), zinc (Zn), and eight other plant-essential nutrients. Results indicate that AWD and FIR can be allowed to dry to at least -45 kPa in the upper third of the field at depth of 10 cm prior to each irrigation event. The optimal N program for FIR on clayey soils was a three-way split application, which included an additional 52 kg N ha-1 over the recommended season total N rate for flooded rice production, but further economic analysis is certainly needed. While this program also maximized rice grain and milling yield on a silt loam soil, it appears that the extra 52 kg N ha-1 may not be needed and that more management options may be possible to optimize FIR production on a silt loam soil. However, it appears that there is no need to manage the top and bottom of the field separately in terms of N management. Nutrient uptake surveys from sites on both clayey and silt loam soil textures suggest that P and K uptake are much less at the top of the field, where aerobic conditions generally exist throughout the season. Thus, it may be necessary to focus on P and K management in FIR in the future and amended management recommendations may be advised. Through the studies conducted as a part of this project, it has been shown that AWD and FIR production are viable methods for growing rice in the Mid-South. The management aspects examined in the current studies should allow rice producers considering AWD, and especially FIR, to maximize rice grain yield and milling yield while minimizing the potential negative environmental impact associated with the transition to these alternative methods of rice irrigation.

Download or read book Agronomic Rice Practices and Postharvest Processing written by Deepak Kumar Verma and published by CRC Press. This book was released on 2018-12-07 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume addresses three important agricultural aspects of rice: physical characteristics, physico-chemical characteristics, and the organoleptic aspects. Divided into sections, the book first examines recent trends and advances for higher production and quality improvement, focusing on the effects of climate on rice cultivation and climate-resilient agricultural practices in rice. The volume goes on to cover nutrient management for rice production and quality improvement. Chapters also address weed management and postharvest processing practices for improved rice production. With chapters from renowned scientists, researchers, and professors, this book will be a useful reference for rice researchers working in the area of agronomic practices, postharvest processing, and quality improvement in rice.

Download or read book Water Management in Irrigated Rice written by B. A. M. Bouman and published by Int. Rice Res. Inst.. This book was released on 2007 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Technology Aimed to Improve Nitrogen Use Efficiency for Delayed flood Rice Oryza Sativa L Production written by Jason Morris Satterfield and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Improving nitrogen (N) use efficiency is crucial for maximizing growth and yield in rice production. Tools to determine precise midseason N rates as well as knowledge of the effects of starter fertilizer N applications on rice growth and yield are lacking. Field experiments were conducted in 2007 and 2008 at the Delta Research and Extension Center to evaluate canopy reflectance as a means for determining yield and N nutrition at midseason and to assess agronomic effects and N recovery efficiency of starter fertilizer N. Measurable in-season parameters were significantly related to grain yield. Grain yield and measured parameters were related to canopy reflectance. The results of this study support the continued research of canopy reflectance for predicting N nutrition indicators and yield. Minimal growth responses were observed when starter N was applied to seedling rice. Nitrogen recovery increased significantly throughout the growing season; however, less than 20% recovery was obtained.

Download or read book Optimizing Nitrogen Management to Achieve Agronomic and Environmental Goals in Rice Production written by Cameron Mark Pittelkow and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Optimizing nitrogen (N) management is a critical component of meeting yield potential and increasing global food supply while reducing environmental impacts from agriculture. The objective of this dissertation was to evaluate N management practices in conventional and alternative direct-seeded rice production systems in California in order to enhance rice productivity while minimizing environmental costs, particularly concerning greenhouse gas (GHG) emissions. In Chapter 2, agronomic productivity and N requirements of resource-conserving rice establishment systems utilizing no-till stale seedbed practices for improved weed control were assessed. Without N fertilizer addition, yields were lower for alternative compared to conventional establishment systems, likely as a result of greater soil N losses. Accordingly, economic optimum nitrogen rates based on yield response to N trials indicated an additional 30 to 35 kg N ha−1 was needed to maximize returns to N in water-seeded stale seedbed systems. These results suggest that alternative establishment systems are viable from an agronomic and economic standpoint in California provided N rates are close to optimal and establishment methods are selected to target weed species of concern. In Chapters 3 and 4, the relationship between N management, crop productivity, and GHG emissions was investigated. Integrating climate change and agronomic productivity concerns, global warming potential was assessed on a yield-scaled as well as per unit area basis. It was hypothesized that in response to fertilizer N addition, yield-scaled global warming potential would be minimized at N rates that maximize yields. In a two-year on-farm experiment in water-seeded rice (Chapter 3), N2O emissions remained low regardless of N rate when a permanent flood was maintained but large N2O fluxes occurred during discrete field drainage periods prior to harvest, particularly at high N rates. In contrast, differences were not observed between N rates for CH4 emissions. Across years CH4 represented 94% of total global warming potential, thus mean annual yield-scaled global warming potential significantly decreased at optimal N rates due to increasing yields. In Chapter 4, these field results were combined with available data from the literature to evaluate yield-scaled global warming potential as a function of yield N surplus, here defined as N application rate minus the N rate at which maximum yield was achieved within each study. At surplus N rates, N2O and yield-scaled N2O emissions increased exponentially. However, CH4 emissions were not impacted by N inputs, hence yield-scaled CH4 emissions decreased with N addition. Overall, yield-scaled global warming potential was minimized at optimal N rates, decreasing by 21% compared to treatments without N addition. Balancing gains in agricultural productivity with environmental concerns, this work supports the concept that high rice yields can be achieved with minimal yield-scaled global warming potential when N inputs are closely matched with crop demand.

Download or read book Effect of Simulating Flooding Pattern on Nitrogen Management in Rice Oryza Sativa L Production written by Quaqua Sumo Mulbah and published by . This book was released on 2010 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Redesigning Rice Photosynthesis to Increase Yield written by J. E. Sheehy and published by Int. Rice Res. Inst.. This book was released on 2000 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Increasing Productivity of Intensive Rice Systems Through Site Specific Nutrient Management written by A. Dobermann (Ed) and published by Int. Rice Res. Inst.. This book was released on 2004 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Rice Research for Abiotic Stress Tolerance written by Mirza Hasanuzzaman and published by Woodhead Publishing. This book was released on 2018-11-12 with total page 986 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Rice Research for Abiotic Stress Tolerance provides an important guide to recognizing, assessing and addressing the broad range of environmental factors that can inhibit rice yield. As a staple food for nearly half of the world’s population, and in light of projected population growth, improving and increasing rice yield is imperative. This book presents current research on abiotic stresses including extreme temperature variance, drought, hypoxia, salinity, heavy metal, nutrient deficiency and toxicity stresses. Going further, it identifies a variety of approaches to alleviate the damaging effects and improving the stress tolerance of rice. Advances in Rice Research for Abiotic Stress Tolerance provides an important reference for those ensuring optimal yields from this globally important food crop. Covers aspects of abiotic stress, from research, history, practical field problems faced by rice, and the possible remedies to the adverse effects of abiotic stresses Provides practical insights into a wide range of management and crop improvement practices Presents a valuable, single-volume sourcebook for rice scientists dealing with agronomy, physiology, molecular biology and biotechnology

Download or read book Effects of Soil and Water Management Practices on Water Use and Yield of Rice Oryza Sativa L on Medium Texture Soil written by Mohammad Maksum and published by . This book was released on 1985 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water wise Rice Production written by B. A. M. Bouman and published by Int. Rice Res. Inst.. This book was released on 2002 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Nitrification and Methods to Minimize Denitrification Loss for Rice Oryza Sativa L on Mississippi Alluvial Plain Soils written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Minimal studies have evaluated nitrification and subsequent denitrification for soils where rice is produced in the delayed-flood system. Laboratory and field experiments were conducted at USDA-ARS and the Delta Research and Extension Center in Stoneville, MS to quantify the nitrification potential of southern USA soils, and evaluate nitrogen amendments aimed to reduce nitrification rates on clay soils. The Sharkey clay soil at Stoneville, MS was one of the soils with the greatest nitrification potential. Dicyandiamide (DCD) increased the number of days that half the total recovered inorganic-N was in the ammonium-N form (half-life))by approximately 3-fold and 18% when compared to non-amended urea in the laboratory and field, respectively. Results suggested that nitrapyrin was not an effective nitrification inhibitor in southern soil. Coated urea (43%N) applied 12 days before flood establishment (dbf) was most successful at reducing nitrification resulting in yield comparable to urea applied one dbf.

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water Productivity in Agriculture written by J. W. Kijne and published by CABI. This book was released on 2003 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: First title in a major new seriesAddresses improving water productivity to relieve problems of scarcity and competition to provide for food and environmental securityDraws from scientists having a multitude of disciplines to approach this important problemIn a large number of developing countries, policy makers and researchers are increasingly aware of the conflicting demands on water, and look at agriculture to be more effective in its use of water. Focusing on both irrigated and rain-fed agriculture, this book gives a state of the art review of the limits and opportunities for improving water productivity in crop production. It demonstrates how efficiency of water use can be enhanced to maximize yields. The book represents the first in a new series of volumes resulting from the Comprehensive Assessment of Water Management in Agriculture, a research program conducted by the CGIAR's Future Harvest Centres, the Food and Agriculture Organization of the United Nations and partners worldwide. It will be of significant interest to those working in areas of soil and crop science, water management, irrigation, and development studies.

Download or read book Climate Neutral and Resilient Farming Systems written by Udaya Sekhar Nagothu and published by Taylor & Francis. This book was released on 2022-11-08 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents evidence-based research on climate-neutral and resilient farming systems and further provides innovative and practical solutions for reducing greenhouse gas emissions and mitigating the impact of climate change. Intensive farming systems are a significant source of greenhouse gas emissions, thereby contributing to global warming and the acceleration of climate change. As paddy rice farming is one of the largest contributors, and environmentally damaging farming systems, it will be a particular focus of this book. The mitigation of greenhouse gas emissions needs to be urgently addressed to achieve the 2°C target adopted by COP21 and the 2015 Paris Agreement, but this is not possible if local and national level innovations are not accompanied by international level cooperation, mutual learning and sharing of knowledge and technologies. This book, therefore, brings together international collaborative research experiences on climate-neutral and resilient farming systems compiled by leading scientists and experts from Europe, Asia and Africa. The chapters present evidence-based research and innovative solutions that can be applied or upscaled in different farming systems and regions across the world. Chapters also present models and technologies that can be used for practical implementation at the systemic level and advance the state-of-the-art knowledge on carbon-neutral farming. Combining theory and practice, this interdisciplinary book provides guidance which can inform and increase cooperation between researchers from various countries on climate-neutral and resilient farming systems. Most importantly, the volume provides recommendations which can be put into practice by those working in the agricultural industry, especially in developing countries, where they are attempting to promote climate-neutral and resilient farming systems. The book will be of great interest to students and academics of sustainable agriculture, food security, climate mitigation and sustainable development, in addition to policymakers and practitioners working in these areas. The Open Access version of this book, available at www.taylorfrancis.com, has been made available under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license.