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High tunnel, open-field production systems compared for lettuce, tomato
Date:11/19/2013

MOUNT VERNON, WA--In the mild coastal climate of western Washington, agricultural growers are learning more about the advantages of growing popular fresh-market vegetables in high tunnel production systems. High tunnels can offer many benefits for delicate vegetable crops, including protection from environmental stresses such as hail, frost, excessive rainfall, and high wind. Despite these obvious benefits, the use of high tunnels for growing both lettuce and tomato is currently limited in the region--estimated to be only 50 acres for tomato and less than 20 acres for lettuce. According to Washington State University researchers Suzette Galinato and Carol Miles, the adoption rate for using high tunnels is low in the region due to a lack of in-depth knowledge about specific high tunnel production practices for tomato and lettuce, the high tunnel structures best suited to each crop, potential returns, and the capital investment needed to initiate and maintain high tunnel production.

Results of the scenarios showed that, for lettuce, the labor cost per square foot of growing area was found to be six times greater in a high tunnel than in the open field. For tomato, labor costs were ten times greater in a high tunnel than in the open field. Total labor cost comprised more than 50% of the total production costs of lettuce and tomato in both the high tunnel and open-field systems. Given the base crop yield and average price, economic analysis showed that growing lettuce in the open field is 43% more profitable than in the high tunnel, while in contrast, high tunnel-grown tomato was three times more profitable than open-field tomato production.

Galinato and Miles' new study published in HortTechnology contains specific information about effective regional production practices for tomato and lettuce, variable and fixed costs of production, and potential returns based on defined assumptions about high tunnel or open-field production of each crop.The
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Contact: Michael W. Neff
mwneff@ashs.org
703-836-4606
American Society for Horticultural Science
Source:Eurekalert

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