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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.
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.
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