Spatial variability of soil temperature under greenhouse conditions

The spatial variability of surface temperature has been examined under greenhouse conditions at Al-Mada'in Research station. Soil temperatures were measured at 14:00 h on 3 consecutive days after a trickle irrigation. Measurements were made every 0.5 m along a 55-m transect with copper–Constantan thermocouples. In addition, soil samples were collected to determine the thermo-gravimetric water content between the soil surface and 0.05 m depth. Cross semi-variograms and cross-correlation functions were determined and the measurements were found to be correlated over space.