Rainfall climatology and cropping systems for tail-end Veeranam ayacut command area of Tamil Nadu.

摘要

Weekly rainfall data of 22 years (1982-2003) pertaining to tail-end Veeranam ayacut command area of Tamil nadu, India, were analysed to determine its variability, probability and Moisture Availability Index (MAI), and the results are presented in this paper. Each standard week from 30th to 52nd received a rainfall of more than 20 mm, indicating the crop growing period starting from 4th week of July to last week of December. Based on the rainfall pattern, a modified cropping system of growing short duration pulses or oilseeds during Kuruvai followed by medium duration thaladi or late samba rice followed by rice fallow pulse is suggested for effective utilization of land, moisture and to enhance the net income of the tail-end Veeranam ayacut farmers..