Physico-chemical properties of soils under different land use systems.
Saqeebulla H. M., Gurumurthy K. T., Prakasha H. C.
Author Affiliation: Department of Soil Science and Agricultural Chemistry, College of Agriculture, Navile, Shimoga, India.
Mysore Journal of Agricultural Sciences 46 : 99-105
Abstract : Studies on chemical properties of soils under different land use systems indicated that the texture of the soils varied from loamy sand to sandy clay loam. Bulk density ranged from 1.38 Mg m3 in Sapota land use system to 1.67 Mg m3 in arecanut land use system. The soils were found to be slightly acidic in soil reaction and all most all the soils were found to be low in electrical conductivity. While, organic carbon content under all the land use systems were low to high (2.40 to 19.36 g kg-1). Low cation exchange capacity values were observed under different land use systems studied. Low calcium carbonate equivalent (0.68%) and free iron oxides (4.55%) contents. The available nitrogen was low to medium (100.35 to 426.50 kg ha-1), while available phosphorus was low (4.99 to 37.12 kg ha-1) and available potassium was low to high (105.00 to 600 kg ha-1) in soils under different land use systems. The sulphur status was higher than the critical limits in different land use system (9.82 to 37.49 mg kg-1). The mean DTPA extractable iron and zinc were highest under arecanut system (53.15 and 1.10 mg kg-1), manganese was highest (20.76 mg kg-1) in mango-cashew system and lowest in (2.64 mg kg-1) paddy system. Copper was highest under paddy land uses systems.