Observational analysis reveals that air temperature impacts soil temperature at 7 and 15 cm depths, suggesting seasonal variations.
Soil temperatures at 7 and 15 cm depths were significantly positively correleted However, the studies with the maximum and minimum ambient temperatures. carried out on sandy loam snil under Delhi climatic conditions during 1969-71 showed different diagnitudes of relationships in winter. pre monsoon and post-monsoon seasons, The changes in soll temperature at 7 cm depth wora more pronounced except during pre-monsoon season when soil temperature at 15 cm depth changed morm markedly with the change in minimum air temperature. Also increasing maximum air tomperature in winter caused decrease in soil temperature at 15 cm till 17°C and Deyund thia soil temperature increased with increasing ambient temperature as happ-ened in other seasons,
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K. et al. (1981) studied this question.
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