Abstract
CONTEXTThe adoption of crop diversification in response to climate change in perennial cropping systems is poorly understood. OBJECTIVEThis study identifies the current level of diversification, determinants of and constraints to adopting crop diversification in tea plantations in Sri Lanka as an example of a perennial crop in a developing country context. METHODSWe use a Panel Tobit model to analyse the driving forces of crop diversification using 2004–2018 data collected from 49 tea estates. In addition, tea estates' managers were interviewed to investigate barriers to adopting crop diversification. RESULTS AND CONCLUSIONSThe study reveals that geo-climatic conditions, magnitude of increase in temperature, and higher revenue variability are the specific factors influencing managers' probability of adopting crop diversification. Constraints to crop diversification include technological lock-in hindering alternative crops and worker shortages, financial difficulties, lack of productive lands suitable for alternative crops, ineffective Government land-use policies and regional weather patterns such as prolonged rainfall and heavy winds. SIGNIFICANCEIdentified barriers provide important insights into how to assist plantations to adopt crop diversification. We propose three policy recommendations to enhance tea estate managers' adaptive capacity to various environmental and social changes through crop diversification. These are: (1) enable managers to acquire the technical know-how on cultivating alternative crops by conducting practical training programmes connecting with the Department of Agriculture or Agriculture Faculties of regional Universities.; (2) increase awareness of less labor-intensive crops for diversification along with strategies for mechanisation via programmes integrated with the Ministry of Plantation Agriculture and the Agriculture Modernization Project of the Department of Agriculture; and (3) enact a national policy to mandate crop diversification in marginal tea lands with financial assistance from the Government.
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