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- Title
Analysis of rainfall characteristics for crop planning under low altitude sub tropical agro ecological zone of Jammu region.
- Authors
SHARMA, CHARU; SINGH, MAHENDER; SHARMA, ROHIT; SHARMA, VEENA
- Abstract
Successful agricultural management essential by requires to know the sequence of dry and wet spells along with onset and withdrawal of monsoon season. With this view, an attempt has been made to analyze 30 years of rainfall (1987-2016) data of Jammu region to understand the south west monsoon characteristics. The rainfall probability analysis done by using Markov chain model for crop planning in the region revealed that the earliest and delayed week of the onset of the rainy season was found during the 25th Standard Meteorological Week (SWM) and 27th SWM, respectively. Similarly, the cessation of rainfall (earliest and delayed week) was found in the 38th and 40th SMW, respectively. The onset of monsoon was negatively significantly related and withdrawal is positively linearly related with total amount of rainfall received during this period. The duration of growing season was found 87 ± 15 days with rainy days of 32 ± 7 days. Out of the total annual rainfall about 74 per cent was received during south-west monsoon and 14.4 per cent rainfall received in rabi season. The initial probability of the wet weeks (26th - 34th SMW) varied between 60.6 and 90.9 percent, whereas, the conditional probability of wet week followed by another wet week (PWW) varied between 72.7 and 96 percent. The analysis of dry weeks are needed for supplemental irrigations and moisture conservation practices whereas, successive wet weeks gave an idea of excessive runoff water for rainwater harvesting and to take up suitable measures to control soil erosion in rainfed areas.
- Subjects
JAMMU &; Kashmir (India); CROP management; RAINFALL; ECOLOGICAL zones; TROPICAL agriculture
- Publication
Journal of Agrometeorology, 2017, Vol 19, p60
- ISSN
0972-1665
- Publication type
Article