Impact of land use systems on soil phosphorus and potassium in Khammam district, Telangana state

Land use systems can have a significant impact on the availability of important soil nutrients like phosphorus and potassium. This study was conducted to assess the impact of different land use systems on soil phosphorus and potassium in Khammam district, Telangana State. Soil samples were collected from three depths i.e., 0-15 cm, 15-30 cm and 30-45 cm of seven major land use systems viz., rice-rice, rice-pulse, rice-maize, cotton-fallow, chilli-fallow, mango orchard and forest. Two-way analysis of variance used to analyse phosphorus and potassium under different land use systems. Results unveiled that maximum phosphorus (40.87 kg ha-1) content and potassium (316.64 kg ha-1) content was recorded under forest land use system. Lower phosphorus content (27.65 kg ha-1) was observed in cotton-fallow and lower potassium content (243.11 kg ha-1) recorded under rice-rice system. This study conclude that different land uses have significant effect on soil phosphorus and potassium which lead to change in soil nutrient status.