Fuente: WIPO "tomato" The present technology is directed to climate control systems suitable for studying plant growth in open-air fields and associated methods of operation. In one example, a method includes exposing a test specimen of a crop in an open-air field to substantially the same sunlight, precipitation, and/or pestilence conditions as a control specimen in the same open-air field for a test period. The test specimen is at least partially enclosed by a structure while the control specimen is outside of the structure. The structure has a first opening toward the soil of the open-air field and second opening exposed to ambient air. During the test period, a test temperature profile is maintained in the internal space of the structure while an air curtain is placed across the second opening of the structure to limit or prevent thermal interactions between the internal space of the structure and the ambient air.