El Nino Effect on Agriculture in Andhra Pradesh: Rainfall Variability, Crop Production and Adaptation Measures

Abstract

The El-Nino Southern Oscillation (ENSO) is one of the major large scale climate phenomena affecting the rainfall variability over the Indian subcontinent. Andhra Pradesh, with its large area under rainfed agriculture and heavily reliant on the southwest and northeast monsoons, is particularly susceptible to the variations in rainfall and temperature associated with El Niño events. In this paper we examine the effect of El Nino on agricultural production in Andhra Pradesh with a special emphasis on rainfall variability, crop productivity, cropping systems and farm level vulnerability. The study is based on secondary data and review of empirical studies relating ENSO and rainfall and agricultural performance in the state of Andhra Pradesh. Evidence indicates that El Niño tends to be associated with deficient southwest monsoon rainfall, although the magnitude and spatial distribution of the effect varies greatly across regions and seasons. The historical records reveal that the 2002 El Nino event was related to large rainfall deficit and a decline in the yield of rice in Andhra Pradesh. Studies have also reported declines in area, production and productivity of Kharif rice in El Nino years. Rainfed crops like groundnut, pigeonpea, maize, pearl millet and other dryland crops are facing particular problems of dry spells and moisture stress. However, the links between El Niño and agricultural output are not deterministic, as irrigation, crop choice, soil condition, technological adoption and the northeast monsoon can moderate its impacts. The paper calls for ENSO-informed agricultural planning, drought-resilient varieties, diversification, supplemental irrigation, weather-based advisories, crop insurance and district-specific contingency planning. Andhra Pradesh must develop climate resilient agriculture to safeguard farm incomes and food security.