Abstract

                                Ramdas and Dravid (1) studied the variations of soil temperatures at Poona using soil covers of different colours. Dravid (2) has stated that Poona black cotton soil absorbs 84 per cent of the incident solar radiation while Sakrand soil absorbs only 59 per cent, by virtue of the difference in their colours. At the Central Farm, Coimbatore, black, red and alluvial soils (Tank silt) exist side by side and crops are grown on all of them. The three types of soils may be have differently to the same incident solar radiation. In the following note, the results of the study on the variations of surface soil temperature on the above three agriculturally important soils are summarised.

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