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Mapping of agro-ecological zones of Andhra Pradesh through soil-resource data

Indian Agricultural Research Journals

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Title Mapping of agro-ecological zones of Andhra Pradesh through soil-resource data
 
Creator NAIDU, L G K
REDDY, R S
SAH, K D
BHASKAR, B P
DATTA, D
NIRANJANA, K V
DHANORKAR, B A
SRINIVAS, S
NAGARAJU, M S S
RAY, S K
RAGHUMOHAN, N G
 
Subject agro-ecological zones, agr-climatic zones, soil water balance, potential evapo-transpiration, length of growing period
 
Description An attempt was made to delineate agro-ecological zones of Andhra Pradesh using soil-resource information generatedon 1 250 000 scale and rainfall data of 700 rain gauge stations. Length of growing period was computed using bothsoil-water balance and 0.7 potential evapo-trampiration concept and length of growing periOd map generated. Thelength of growing period map was superimposed over soil and physiography layer maps through geographical informationsystem and a 22 agro-ecological zones map was generated. The 7 agro-climatie zones map of the Andhra PradeshAgricultural Umversity prepared under National Agricultural Research Project was superimposed over 22 agro-ecologicalzones map for comparison and discussion. The length of growing period varied from as low as 70-90 days inRayalaseema plateau covering about 6% and as high as 210-240 days in the eastern ghats (north) and Delta plainscovering about 6 and 2% area of the state respectively. The crop growing season starts ea~Iiest in the last week of Aprilin zone 14 of eastern ghats (north) and very late beginning in the first week of August in the southeast coastal plain.Soils in general are dominantly gravelly red, black and deltaic alluvial except in the eastern ghats (north) where they arebrown forest soils with high humus content. The 22 agro-ecological ZOnes when compared with the agro-climatic zonesindicated that wide variability with respect to physiography, soils and length of growing period and has 2-4 agto-ecological zones within an each agro-climatic zone. Hence there is a need to reorient research programme based on 22agro-ecological zones for efficient use and conservation of natural resources and agro-teehnology transfer.
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor —
 
Date 2013-02-25
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/27745
 
Source The Indian Journal of Agricultural Sciences; Vol 68, No 10 (1998)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/27745/12596
 
Rights Copyright (c) 2014 The Indian Journal of Agricultural Sciences