Free access | Research Article

Evaluation of different districts of Tamil Nadu to mine out seasonal soil moisture stress based on moisture index for crop planning

S Kokilavani, S Panneerselvam, R Nagarajan, TN Balasubramanian

Published on: 28 Jun 2015 | Volume: 2, Issue: 2 | Pages: 20-26 |

By utilizing the Southwest and Northeast monsoon seasonal rainfall data of 90 years (1911-2000) of 32 districts of Tamil Nadu leaving Chennai district, combo analyses (combined analysis) were made  between moisture index values to find out the seasonal soil moisture stress status by using Thornthwaite and Mather (1955) moisture index.   Paired t- test and correlation tools were used to evaluate the link between the two seasonal moisture stresses. The results on combo analysis made from moisture indices of both Southwest monsoon and Northeast monsoon of the same year, it was found from the paired t-test analysis that all the districts except Coimbatore did vary for their soil moisture status, while it was inferred from the results of correlation analysis that, all the districts did not vary for soil moisture stress except the district Perambalur. In respect of combo analysis made between the moisture indices of Northeast Monsoon of the previous year and the Southwest Monsoon of the succeeding year, the result from paired t- test revealed the similar findings that were observed for the combo analysis made between both Southwest monsoon and Northeast monsoon of the same year. In respect of correlation study except Tirunelveli district, the entire district did not vary significantly. Accordingly, crop plan agenda is suggested from the literature