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Spatial and Temporal Distribution of Soil Water Availability in the Indo-Gangetic Plains of India, Bangladesh, Pakistan, and in Sri Lanka: Natural Resource Management Program Report No. 3

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Title Spatial and Temporal Distribution of Soil Water Availability in the Indo-Gangetic Plains of India, Bangladesh, Pakistan, and in Sri Lanka: Natural Resource Management Program Report No. 3
 
Creator Chauhan, Y S
Bantilan, F T
Padmaja, R
Irshad Ahmed, M
Moinuddin, M
Rahman, M M
Haqqani, A M
Nizamuddin, M S
Johansen, C
 
Subject Food legumes
Agriculture-Farming, Production, Technology, Economics
 
Description Cultivation of legumes, which used to be an important component of the cropping systems in South Asia, has been ignored by farmers growing
rice and/or wheat crops, or relegated to marginal lands in recent years. This bulletin contends that greater cultivation of legumes for grain,
forage or as green manure in rice and wheat systems can help maintain sustainability of these systems and achieve a required level of crop
diversification. As legumes are normally grown rainfed, soil water availability will be a major determinant of their success or otherwise. This
bulletin presents temporal and spatial soil water availability scenarios in order to assess the scope for greater inclusion of legumes in the
predominantly rice or wheat-based cropping systems of the Indo-Gangetic Plains of India, Bangladesh, and Pakistan and for rice-based
cropping systems in Sri Lanka. This has been achieved through the application of a water balance model ‘WATBAL’ and making use of
geographic information systems (GIS) to display and analyze month-wise maps of various indices of soil water availability, and determine
length of growing season. The scenarios indicate considerable spatial and temporal variability with respect to rainfall and moisture indices
varying from more favorable to less favorable. The water availability scenarios presented in this bulletin are generic in nature and can also be
used to assess other rainfed crops besides legumes and refine irrigation scheduling for irrigated crops. These scenarios are based on monthly
input of climatic data and therefore could be improved further using daily or weekly climatic data for the target regions.
 
Publisher International Crops Research Institute for the Semi-Arid Tropics
 
Date 2001
 
Type Monograph
NonPeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/3686/1/481-2001.pdf
Chauhan, Y S and Bantilan, F T and Padmaja, R and Irshad Ahmed, M and Moinuddin, M and Rahman, M M and Haqqani, A M and Nizamuddin, M S and Johansen, C (2001) Spatial and Temporal Distribution of Soil Water Availability in the Indo-Gangetic Plains of India, Bangladesh, Pakistan, and in Sri Lanka: Natural Resource Management Program Report No. 3. Monograph. International Crops Research Institute for the Semi-Arid Tropics , Patancheru, Andhra Pradesh, India.