ABSTRACT: The thermal wave amplitude method is used to determine soil thermal diffusivity in situ for a sandy soil in Mexico (Coatzacoalcos, Veracruz). Soil diurnal temperature fluctuations were measured from depths of 0.05 to 0.65 m, in 0.01 m increments, during the months of April and August. Five mean diffusivity values were obtained experimentally, corresponding to the different depths combination. The soil thermal diffusivity ranged between 2.26 × 10−7 and 8.71 × 10−7 m2 s−1. The diffusivity values obtained are […]

A four replicated maize (Zea mays L.) crop irrigation management experiment was carried out in a Typic Haphortox soil of Guaíra (SP), Brazil (20°27’30”S, 48°19’30”W, 495 m) from July to December, 1994. There were three treatments: tr000 – half of the recommended amount of water was applied during the crop cycle; tr0I0 – the recommended amount of water was applied only during the intermediate stage and half of it during the initial and the final stages; and trIII – the […]