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Humic to fulvic acid ratio in relation to depth of cracking in some Vertisols of India



Humic to fulvic acid ratio in relation to depth of cracking in some Vertisols of India



Pedologie 30(3): 335-339



The ratio of humic to fulvic acid in profiles of four different series of black clay soils (Vertisols) remained greater than unity in the zone of occurrence of cracks. Below this zone the ratio approached unity and became less than one with increasing depth. These results suggest that soil cracking provides conditions favourable for the synthesis of humus polymers of high molecular weight (humic acid).

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Accession: 000903793

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