Summary and conclusions
From a study of the composition of the soil and the subsoil under three grasses,Imperata cylindrica, Pennisetum orientale, Pennisetum polystachyum and three legumesTephrosia candida, Medicago sativa andPueraria hirsuta and of those of natural bare soil in the neighbourhood of each, it could be observed that the soils under vegetation contained more moisture, organic matter, organic nitrogen clay and soluble salts but had lower pH values than the bare soils. The soils under grasses had less moisture, lower pH and lower salinity but higher clay content and exhibited greater aggregation than the soils under legumes. Though the soils under grasses had significantly higher quantities of organic matter than the soils under legumes there was no significant difference in the organic nitrogen contents between them.
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Adil, M.L., Kathavate, Y.V. & Sen, A. Changes in soil associated with continuous growth of some vegetation. Plant Soil 25, 73–80 (1966). https://doi.org/10.1007/BF01347963
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DOI: https://doi.org/10.1007/BF01347963