STATISTICAL ESTIMATION OF RAINFALL DISTRIBUTION AND ITS IMPACT ON PRODUCTION OF MAJOR CROPS IN SOUTHERN DRY ZONE OF KARNATAKA
KrishiKosh
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Title |
STATISTICAL ESTIMATION OF RAINFALL DISTRIBUTION AND ITS IMPACT ON PRODUCTION OF MAJOR CROPS IN SOUTHERN DRY ZONE OF KARNATAKA
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Creator |
BHAVANA, C.P
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Contributor |
Munirajappa, R
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Subject |
biological phenomena, animal developmental stages, parasites, bacteria, fungi, pesticides, wells, concentrates, irrigation, developmental stages
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Description |
Gamma () probability distribution was fitted for 30 years (1980- 2010) of daily Southwest Monsoon rainfall data of Southern dry zone of Karnataka. The parameters are calculated and goodness of fit of distribution was confirmed by chi-square test. The probability of occurrence of ≤50, 50-150, 150-250 and ≥250 mm of rainfall were obtained for the South-west Monsoon season. A non-parametric approach based on the concept of two-way contingency tables was applied to study the associations of combined effect of rainfall pattern on crop yield by using 30 years crop yield and rainfall data of Southern dry zone of Karnataka. It identifies both rainfall patterns and levels of crop yields that occur during the crop season. Further an attempt is made to measure their associations. Backward elimination was applied to study the effect of rainfall distribution on crop production over the periods. The response is yield and the predictors are rainfall, temperature (maximum & minimum), RH (morning & evening) and sunshine hrs. The least significant variable i.e., the one with the largest ‘P’ value is removed and the model is refitted. Each subsequent step removes the least significant variable in the model until all remaining variables have individual ‘P’ values smaller than some value, such as 0.05 or 0.01. Thus rainfall was found to have a remarkable influence on crop yield for the period under study in Southern dry zone of Karnataka. |
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Date |
2016-12-15T11:36:07Z
2016-12-15T11:36:07Z 2011-08-23 |
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Type |
Thesis
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Identifier |
Th-10081
http://krishikosh.egranth.ac.in/handle/1/90276 |
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Language |
en
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Format |
application/pdf
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Publisher |
University of Agricultural Sciences GKVK, Bangalore
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