In Zacatecas, agriculture consumes 77% of the underground water; 44% of the aquifers are over extracted. All protected agriculture production systems pump water from the aquifers for irrigation, and 96% of the production units were constructed with government support. They also receive support for inputs and domestic production factors. This paper analyzes the impact of agricultural policy on protected tomato production in the state of Zacatecas, Mexico, by examining competitive and efficient technologies and considering alternative sustainable production practices. The Extended Policy Analysis Matrix was applied. The analysis included four technologies under current conditions and two scenarios: a) adoption of sustainable production practices and b) unsustainable practices, at economic and private prices. The sustainable project paid for itself under both private and economic prices.


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