Download or read book Quantifying the Effects of Land Conditions on Rice Growth written by David Casanova and published by . This book was released on 1998 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis represents detailed research on the "rice-soils-weather" system of the Ebro Delta (Spain) providing knowledge on how temperature, radiation, soil properties and farm management determine rice growth. After an introductory chapter, the findings are developed step-by-step. (i) Chapter 2 is an overview of the conditions in the study area. (ii) Chapter 3 focuses on the study of the soils creating a soil geographic database of the northern part of the Ebro Delta. Four properties were used for defining soil units; soil development, drainage status, texture and salinity. (iii) Chapters 4 and 5 deal with rice growth under weather limited conditions. Potential productions of 13000 kg ha-1 were estimated, while maximum yields of 11000 kg ha-1 were recorded at field level. In Chapter 4, the phenological development, the daily dry matter production and the leaf area development of the rice crop were modelled. In Chapter 5, the use of remote sensing techniques at field level for monitoring the rice crop status were tested. (iv) Chapters 6 and 7 analyze rice growth in relation to soil properties and farm management. Two soil factors were found to dominate the effects on yield: one was topsoil CEC (in strong association with clay content) with a positive effect, and the other one was soil salinity with a negative effect. High groundwater tables did not have significant effects on rice yield, except when the water had a high salt content. Four main groups of causes within the cropping status limited rice growth: potassium and zinc shortage where a strong antagonism of either factor with sodium was observed, low plant establishment where a minimum number of 160-180 plants m-2 was necessary to maximize yield, and length of the growing season, especially the length of the pre-heading period in which the potential size of the crop was primarily determined. Potassium and zinc shortages in the plant were mainly induced by soil salinity. High K in saline soils did not increase K uptake. It remains to be determined if addition of Zn will increase Zn uptake. Information on environmental conditions of the study area and data on rice cropping is presented so that farmers, extension workers and decision-makers find themselves in a better position to adapt their management and policy making. This thesis intends to support development of decision systems and to increase cooperation between agricultural and environmental scientists focusing on concerns of society.
Download or read book Recent Advances in Quantitative Remote Sensing written by José A. Sobrino and published by Universitat de València. This book was released on 2002 with total page 1046 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantifying the Effects of Temperature and Photoperiod on Phenological Development to Flowering in Rice written by Xinyou Yin and published by . This book was released on 1996* with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Climate Change and Future Rice Production in India written by K. Palanisami and published by Springer. This book was released on 2019-07-04 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explains in depth the issues and challenges faced by rice farmers in India in relation to production and productivity, and the possible adaptation strategies to climate change. Based on five years of groundbreaking research on emerging trends in cultivation in major rice growing regions in India, it begins by describing production and yield trends across different rice growing regions. It then offers a comprehensive review of relevant literature and the quantification methodologies and approaches used to analyze the impact of climate change. The book also analyzes climate change impacts on rice productivity and production, applying field-tested quantification methods, such as the Just-Pope production function where time series and cross-section data are simultaneously used for all regions. The results are presented for five geographical regions of India – northern, eastern, western, central and southern – for better comparison and readability. The analyses cover scenarios for both mid-century (2021–2050) and end-century (2071–2100), and in the context of climate change, they also incorporate both medium and high carbon emission scenarios. Thus the future rice production and productivity trends are clearly projected for making necessary interventions. Lastly, the book outlines the essentials of an enabling environment policy and discusses the institutional and policy options necessary to ensure sustainable rice production in India. It also makes the case for introducing appropriate and affordable adaptation strategies to support farmers in different rice-growing regions. The cost–benefit analysis of strategies presented in this book provides an invaluable tool for officials at agriculture departments planning up-scaling of agricultural productivity. The projections are also useful for policy makers and planners developing future investment plans to support rice production in their country. Overall, this book is of interest to a wide audience, including professionals and business enterprises dealing with rice, as well as to academic researchers and students.
Download or read book Measuring the Green Revolution written by Dana G. Dalrymple and published by . This book was released on 1975 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantifying the Impact of Soil and Climate Variability on Rainfed Rice Production written by Marco Cletus Sebastiaan Wopereis and published by . This book was released on 1993 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling the Impact of Climate Change on Rice Production in Asia written by Robin B. Matthews and published by Int. Rice Res. Inst.. This book was released on 1995 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book quantifies the impact of climate change on rice production using crop simulation models and integrates existing knowledge of the effects of increased levels of carbon dioxide and temperature. Detailed scenarios are provided for selected major rice-producing countries in Asia: Japan, India, Malaysia, South Korea, China and the Philippines.
Download or read book Quantifying and Understanding Plant Nitrogen Uptake for Systems Modeling written by Liwang Ma and published by CRC Press. This book was released on 2008-08-27 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses New Advancements to Improve Existing Simulations of Plant NitrogenWritten by research pioneers and leading scientists in the area of agricultural systems, Quantifying and Understanding Plant Nitrogen Uptake for Systems Modeling comprehensively covers plant N uptake in agricultural system models, especially for building soil-plant system m
Download or read book Techniques for Field Experiments With Rice written by K. A. Gomez and published by Int. Rice Res. Inst.. This book was released on 1972 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abstracts of Funded Research written by National Research Initiative Competitive Grants Program (United States. Cooperative State Research, Education, and Extension Service) and published by . This book was released on 1997 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guidelines for Soil Description written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2006 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soils are affected by human activities, such as industrial, municipal and agriculture, that often result in soil degradation and loss. In order to prevent soil degradation and to rehabilitate the potentials of degraded soils, reliable soil data are the most important prerequisites for the design of appropriate land-use systems and soil management practices as well as for a better understanding of the environment. The availability of reliable information on soil morphology and other characteristics obtained through examination and description of the soil in the field is essential, and the use of a common language is of prime importance. These guidelines, based on the latest internationally accepted systems and classifications, provide a complete procedure for soil description and for collecting field data. To help beginners, some explanatory notes are included as well as keys based on simple test and observations.--Publisher's description.
Download or read book Understanding Options for Agricultural Production written by G.Y. Tsuji and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first premise of this book is that farmers need access to options for improving their situation. In agricultural terms, these options might be manage ment alternatives or different crops to grow, that can stabilize or increase household income, that reduce soil degradation and dependence on off-farm inputs, or that exploit local market opportunities. Farmers need a facilitating environment, in which affordable credit is available if needed, in which policies are conducive to judicious management of natural resources, and in which costs and prices of production are stable. Another key ingredient of this facilitating environment is information: an understanding of which options are viable, how these operate at the farm level, and what their impact may be on the things that farmers perceive as being important. The second premise is that systems analysis and simulation have an impor tant role to play in fostering this understanding of options, traditional field experimentation being time-consuming and costly. This book summarizes the activities of the International Benchmark Sites Network for Agrotechnology Transfer (IBSNAT) project, an international initiative funded by the United States Agency for International Development (USAID). IBSNAT was an attempt to demonstrate the effectiveness of understanding options through systems analysis and simulation for the ultimate benefit of farm households in the tropics and subtropics. The idea for the book was first suggested at one of the last IBSNAT group meetings held at the University of Hawaii in 1993.
Download or read book on measuring the benefits of lower transport costs written by Hanan G. Jacoby and published by World Bank Publications. This book was released on 2008 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Despite large amounts invested in rural roads in developing countries, little is known about their benefits. This paper derives an expression for the willingness-to-pay for a reduction in transport costs from the canonical agricultural household model and uses it to estimate the benefits of a hypothetical road project. Estimation is based on novel cross-sectional data collected in a small region of Madagascar with enormous, yet plausibly exogenous, variation in transport cost. A road that essentially eliminated transport costs in the study area would boost the incomes of the remotest households-those facing transport costs of about USD 75/ton-by nearly half, mostly by raising non-farm earnings. This benefit estimate is contrasted to one based on a hedonic approach.
Download or read book Methods for Measuring Greenhouse Gas Balances and Evaluating Mitigation Options in Smallholder Agriculture written by Todd S. Rosenstock and published by Springer. This book was released on 2016-08-23 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides standards and guidelines for quantifying greenhouse gas emissions and removals in smallholder agricultural systems and comparing options for climate change mitigation based on emission reductions and livelihood trade-offs. Globally, agriculture is directly responsible for about 11% of annual greenhouse gas (GHG) emissions and induces an additional 17% through land use change, mostly in developing countries. Farms in the developing countries of sub-Saharan Africa and Asia are predominately managed by smallholders, with 80% of land holdings smaller than ten hectares. However, little to no information exists on greenhouse gas emissions and mitigation potentials in smallholder agriculture. Greenhouse gas measurements in agriculture are expensive, time consuming, and error prone, challenges only exacerbated by the heterogeneity of smallholder systems and landscapes. Concerns over methodological rigor, measurement costs, and the diversity of approaches, coupled with the demand for robust information suggest it is germane for the scientific community to establish standards of measurements for quantifying GHG emissions from smallholder agriculture. Standard guidelines for use by scientists, development organizations will help generate reliable data on emissions baselines and allow rigorous comparisons of mitigation options. The guidelines described in this book, developed by the CGIAR Research Program on Climate Change, Agriculture, and Food Security (CCAFS) and partners, are intended to inform anyone conducting field measurements of agricultural greenhouse gas sources and sinks, especially to develop IPCC Tier 2 emission factors or to compare mitigation options in smallholder systems.
Download or read book Measuring the Impact of Climate Change on Indian Agriculture written by Ariel Dinar and published by World Bank Publications. This book was released on 1998-01-01 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using the Ricardian approach (a cross sectional analysis of farm performance across different climate zones), this report examines the impact of climate change on the agriculture sector and the sector's adaptation to that change. Studies in the report measure the climate sensitivity of low-capital agriculture, test whether actual farm performance is as sensitive to climate as agronomic models predict, and compare the climate sensitivity of low-capital farms with the results already calibrated for U.S. agriculture. The goal of the study is to examine farm behavior and test whether there is any evidence that farmers in developing countries currently adjust to their local climates.
Download or read book Encyclopedia of Global Environmental Change The earth system biological and ecological dimensions of global environmental change written by and published by . This book was released on 2002 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Global Environmental Change is the first major reference work in this multi-disciplinary field, and presents outstanding authorship and high quality editing. Comprehensive coverage with over 3,800 pages in 5 volumes. Over 500 articles, 100 biographies, 150 definitions, and 100 acronyms. Extensive bibliographies with up-to-date references. The Wiley Encyclopedia of Global Environmental Change has been published to meet the need for a comprehensive integrated reference in this burgeoning field. Each volume contains articles of between 1,000 and 10,000 words on major topics. Articles contain an abstract written for the non-specialist, followed by the main text, which provides greater detail for the specialist Biographies of distinguished environmental scientists discuss their contributions to a better understanding of global environmental change. Definitions of international terms and descriptions of acronyms of international and regional programs and agencies provide a quick reference source for the environmental scientist and student. Presents a thematic approach and includes theory, empirical studies, and applications emphasising the inter-relationship between various disciplines and systems--From the publisher's description.
