Summary
Some agro-ecological studies over India were earlier made (e.g. [2, 3 ]). While these investigators have primarily depended upon rainfall alone for the evaluation of moisture status of a region, in this study the index of moisture adequacy (I ma ), is utilized instead of mere rainfall and six moisture adequacy regimes are classified. Data of 160 meteorological stations in India are taken for analysis and moisture adequacy regimes were first demarcated. The soils of India were classified following FAO-UNESCO scheme (1974) and six soil regions demarcated, and these are then super-imposed on the moisture adequacy regime map. The resultant agro-ecological zones are identified and demarcated. It is found that there are 29 different types of agro-ecological zones of the possible 36 combinations. Six groupings of zones have been made for appropriate transfer of agrotechnology. The pattern of crops grown in each agro-ecological zone under different groups have been broadly classified and the agro-ecological zones falling under each group are noted.
Zusammenfassung
Einige agroökologische Untersuchungen wurden bereits früher durchgeführt ([2, 3]). Während man sich aber dabei primär auf den Regen allein für die Bewertung des Feuchtezustandes einer Region gestützt hat, wird in dieser Untersuchung ein Index der FeuchtigkeitsangemessenheitI ma =AE/PE% verwendet, an Stelle von Regen allein, und es werden dafür sechs Abstufungen klassifiziert. Für die Analyse werden Beobachtungsdaten von 160 Stationen verwendet und die Abstufungen dieser Indizes werden in Karten abgegrenzt. Nach einem FAO-UNESCO-Schema werden such die Abgrenzungen von sechs Bodentypen in eine Karte eingezeichnet. Aus der Überlagerung beider Karten wurden die agroökologischen Zonen abgeleitet. Es wurden 29 verschiedene Typen von agroökologischen Zonen festgestellt.
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References
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Murthy, R. S., Pandey, S.: Delineation of Agro-Ecological Regions of India. National Bureau of Soil Survey and Land Use Planning (ICAR), New Delhi, 1978.
Panabokke, C. R.: Agro-Ecological Zones of South and South-East Asia. FAO Regional Office for Asia and the Far East Bangkok, Thailand, 1979.
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Subramaniam, A.R. Agro-ecological zones of India. Arch. Met. Geoph. Biocl., Ser. B 32, 329–333 (1983). https://doi.org/10.1007/BF02273984
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DOI: https://doi.org/10.1007/BF02273984