Abstract
Characteristics of microclimate in a greenhouse installed on the slope facing north were grasped experimentally, and verified by a mathematical model. On sunny days, a temperature difference of which maximum was 3 through 4°C was produced along the direction of sloping floor in the house, and the maximum of 2.5°C in temperature difference was produced in the direction perpendicular to the floor. On cloudy days, there were slight temperature differences in the both directions. These microclimates largely depended on the temperature difference between floor and film, which depended on solar intensity and house orientation. It was pointed out that the above temperature difference of 3 through 4°C is meaningful to the variation in growth rate of plants.
