Changes in Paddy Soil Fertility in Tropical Asia under Green Revolution
Changes in Paddy Soil Fertility in Tropical Asia under Green Revolution

Author: Junta Yanai

Publisher: Springer Nature

Published: 2022-06-20

Total Pages: 250

ISBN-13: 9811654255

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This book investigates the effect of the Green Revolution (GR) on long-term changes in the fertility status of paddy soils in tropical Asia. While information on long-term changes in soil fertility status are rather limited due to difficulties in obtaining past data or samples for comparison, this investigation on temporal changes in soil fertility is possible by comparing fertility status in the 2010s, which the authors examined recently, with those from the 1960s, when GR was initiated, which was reported by Kawaguchi & Kyuma (1977). More than 220 paddy soils collected from Thailand, the Philippines, Malaysia, Bangladesh, and Indonesia were analyzed for their physicochemical properties as well as total and available fractions of plant macro- and micro- essential elements, and their temporal changes were examined in addition to their spatial variation in each country. The most significant change was a drastic increase of available phosphorus in soils, possibly due to fertilization after the GR. Changes in organic matter, pH, and other nutrients were relatively small. A considerable decrease in the content of some micronutrients was also observed. Long-term studies on soil fertility status in the past and present will be useful to establish soil/fertilizer management for sustainable rice production in the future. This book is an essential reading for soil scientists, agricultural scientists, environmental scientists, as well as policymakers and nongovernmental officers such as FAO.

Proceedings of Symposium on Paddy Soils
Proceedings of Symposium on Paddy Soils

Author: Institute of Soil Science, Academia Sinica

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 876

ISBN-13: 3642681417

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China contributes a large part to rice production, one of the most important crops in the world. It is estimated that in China rice constitutes about half of the total food production, covering an area of about 30 % of \08 hectares of cultivated land of the whole country. Owing to the peculiar water regime, paddy soils possess quite different properties physically, chemically and biologically as compared with those of upland soils. Such properties have a conspicuous effect on fertility and management practice of paddy field. For the purpose of summing up the past work and opening up new prospects, a "Symposium on Paddy Soils" was organized under the auspices of Academia Sinica, held on October 19-24, 1980 in Nanjing, which was followed by a seven-day paddy soil excursion in the lower Changjiang Delta. In addition to 120 Chinese soil scientists, 56 guests coming from America, Asia, Europe and Oceania attended the symposium on invitation. A total of 110 papers were presented either orally or by poster. All these are collected and published in the present proceedings which we hope may be helpful to the scientific exchanges between soil scientists of China and other countries.

Advances in Rice Science
Advances in Rice Science

Author: Ratikanta Maiti, PhD

Publisher: CRC Press

Published: 2020-11-12

Total Pages: 340

ISBN-13: 1000507645

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During recent decades, tremendous progress and innovations have been made in rice science with the goal of increasing production to meet the world’s growing demands. This new volume provides a concise overview of rice, covering the background and importance of rice; origin, evolution, and domestication of rice; and the world rice production. It goes on to provide new and important recent research advances on many different aspects of rice science and production. The authors look at advances in rice ideotypes, abiotic stress management techniques, biotic stress affecting crop productivity, new methods and technology for cultivation, and new methods and techniques in rice grain quality analysis and processing. It also describes new rice varieties, new hybrid rice technology, and new breeding methods for rice.

The Biodemography of Subsistence Farming
The Biodemography of Subsistence Farming

Author: James W. Wood

Publisher: Cambridge University Press

Published: 2020-04-23

Total Pages: 519

ISBN-13: 1108882730

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Viewing the subsistence farm as primarily a 'demographic enterprise' to create and support a family, this book offers an integrated view of the demography and ecology of preindustrial farming. Taking an interdisciplinary perspective, it examines how traditional farming practices interact with demographic processes such as childbearing, death, and family formation. It includes topics such as household nutrition, physiological work capacity, health and resistance to infectious diseases, as well as reproductive performance and mortality. The book argues that the farming household is the most informative scale at which to study the biodemography and physiological ecology of preindustrial, non-commercial agriculture. It offers a balanced appraisal of the farming system, considering its strengths and limitations, as well as the implications of viewing it as a 'demographic enterprise' rather than an economic one. A valuable resource for graduate students and researchers in biological and physical anthropology, cultural anthropology, natural resource management, agriculture and ecology.