Distribution, stability and trend of rainfall in South Indian coffee tracts

An analysis of rainfall for a forty-year-period (1950-89) in 11 zones of three major coffee growing states of South India shows that the annual rainfall of 1400-3371mm of these zones is received in 80-127 rainy days. July is the wettest month in all the zones excepting in Biligiris, Niligiris, Shevroys and Pulneys. Seven zones fall under S.W. monsoon area receiving 69-80 per cent of annual rainfall during June-September. Summer showers, which are considered to be critical for coffee production, range between 9 and 17 per cent of annual rainfall. Generally, winter rainfall exhibits high instability while S.W. monsoon is found to show the least variability in terms of coefficient of variation. The chance of getting 25mm rainfall in February are more than 50 per cent only in the case of Pulneys and Niligiris of Tamil Nadu, and in all other zones it is found to be far less. However, the chance in March are brighter in all zones of Kerala and Tamil Nadu (more than 90 per cent) than in Karnataka (less than 25 per cent) where a 10mm rainfall seems to have a higher probability. In April, rainfall of 25mm is almost a certainty in all the zones. A steady decline of rainfall, from first to fourth decade, ranging from 3 to 24 per cent is noticed in majority of the zones excepting Niligiris and Pulneys.

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Main Authors: 108287 Radhakrishnan, S., 109578 Reddappa Raju, V., 83996 Krishnamurthy Rao, W.
Format: biblioteca
Published: 1993
Subjects:ZONAS CAFETERAS, PRECIPITACION ATMOSFERICA, INDIA,
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spelling KOHA-OAI-BVE:858112020-01-23T21:09:38ZDistribution, stability and trend of rainfall in South Indian coffee tracts 108287 Radhakrishnan, S. 109578 Reddappa Raju, V. 83996 Krishnamurthy Rao, W. 1993An analysis of rainfall for a forty-year-period (1950-89) in 11 zones of three major coffee growing states of South India shows that the annual rainfall of 1400-3371mm of these zones is received in 80-127 rainy days. July is the wettest month in all the zones excepting in Biligiris, Niligiris, Shevroys and Pulneys. Seven zones fall under S.W. monsoon area receiving 69-80 per cent of annual rainfall during June-September. Summer showers, which are considered to be critical for coffee production, range between 9 and 17 per cent of annual rainfall. Generally, winter rainfall exhibits high instability while S.W. monsoon is found to show the least variability in terms of coefficient of variation. The chance of getting 25mm rainfall in February are more than 50 per cent only in the case of Pulneys and Niligiris of Tamil Nadu, and in all other zones it is found to be far less. However, the chance in March are brighter in all zones of Kerala and Tamil Nadu (more than 90 per cent) than in Karnataka (less than 25 per cent) where a 10mm rainfall seems to have a higher probability. In April, rainfall of 25mm is almost a certainty in all the zones. A steady decline of rainfall, from first to fourth decade, ranging from 3 to 24 per cent is noticed in majority of the zones excepting Niligiris and Pulneys.An analysis of rainfall for a forty-year-period (1950-89) in 11 zones of three major coffee growing states of South India shows that the annual rainfall of 1400-3371mm of these zones is received in 80-127 rainy days. July is the wettest month in all the zones excepting in Biligiris, Niligiris, Shevroys and Pulneys. Seven zones fall under S.W. monsoon area receiving 69-80 per cent of annual rainfall during June-September. Summer showers, which are considered to be critical for coffee production, range between 9 and 17 per cent of annual rainfall. Generally, winter rainfall exhibits high instability while S.W. monsoon is found to show the least variability in terms of coefficient of variation. The chance of getting 25mm rainfall in February are more than 50 per cent only in the case of Pulneys and Niligiris of Tamil Nadu, and in all other zones it is found to be far less. However, the chance in March are brighter in all zones of Kerala and Tamil Nadu (more than 90 per cent) than in Karnataka (less than 25 per cent) where a 10mm rainfall seems to have a higher probability. In April, rainfall of 25mm is almost a certainty in all the zones. A steady decline of rainfall, from first to fourth decade, ranging from 3 to 24 per cent is noticed in majority of the zones excepting Niligiris and Pulneys.ZONAS CAFETERASPRECIPITACION ATMOSFERICAINDIAIndian Coffee (India)
institution IICA
collection Koha
country Costa Rica
countrycode CR
component Bibliográfico
access En linea
databasecode cat-sibiica
tag biblioteca
region America Central
libraryname Sistema de Bibliotecas IICA/CATIE
topic ZONAS CAFETERAS
PRECIPITACION ATMOSFERICA
INDIA
ZONAS CAFETERAS
PRECIPITACION ATMOSFERICA
INDIA
spellingShingle ZONAS CAFETERAS
PRECIPITACION ATMOSFERICA
INDIA
ZONAS CAFETERAS
PRECIPITACION ATMOSFERICA
INDIA
108287 Radhakrishnan, S.
109578 Reddappa Raju, V.
83996 Krishnamurthy Rao, W.
Distribution, stability and trend of rainfall in South Indian coffee tracts
description An analysis of rainfall for a forty-year-period (1950-89) in 11 zones of three major coffee growing states of South India shows that the annual rainfall of 1400-3371mm of these zones is received in 80-127 rainy days. July is the wettest month in all the zones excepting in Biligiris, Niligiris, Shevroys and Pulneys. Seven zones fall under S.W. monsoon area receiving 69-80 per cent of annual rainfall during June-September. Summer showers, which are considered to be critical for coffee production, range between 9 and 17 per cent of annual rainfall. Generally, winter rainfall exhibits high instability while S.W. monsoon is found to show the least variability in terms of coefficient of variation. The chance of getting 25mm rainfall in February are more than 50 per cent only in the case of Pulneys and Niligiris of Tamil Nadu, and in all other zones it is found to be far less. However, the chance in March are brighter in all zones of Kerala and Tamil Nadu (more than 90 per cent) than in Karnataka (less than 25 per cent) where a 10mm rainfall seems to have a higher probability. In April, rainfall of 25mm is almost a certainty in all the zones. A steady decline of rainfall, from first to fourth decade, ranging from 3 to 24 per cent is noticed in majority of the zones excepting Niligiris and Pulneys.
format
topic_facet ZONAS CAFETERAS
PRECIPITACION ATMOSFERICA
INDIA
author 108287 Radhakrishnan, S.
109578 Reddappa Raju, V.
83996 Krishnamurthy Rao, W.
author_facet 108287 Radhakrishnan, S.
109578 Reddappa Raju, V.
83996 Krishnamurthy Rao, W.
author_sort 108287 Radhakrishnan, S.
title Distribution, stability and trend of rainfall in South Indian coffee tracts
title_short Distribution, stability and trend of rainfall in South Indian coffee tracts
title_full Distribution, stability and trend of rainfall in South Indian coffee tracts
title_fullStr Distribution, stability and trend of rainfall in South Indian coffee tracts
title_full_unstemmed Distribution, stability and trend of rainfall in South Indian coffee tracts
title_sort distribution, stability and trend of rainfall in south indian coffee tracts
publishDate 1993
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