The availability of soil phosphorus and potassium in calcareous saline sodic soils as influenced by chemical amendments
Ahmad, B.; Muhammad, S.; Makhdum, M.I.
Pakistan Journal of Scientific and Industrial Research 31(8): 551-556
ISSN/ISBN: 0030-9885 Accession: 007874009
A field investigation was conducted on Khurrianwala saline-sodic soil series to evaluate the availability of soil phosphorus and potassium during reclamation with chemical amendments (gypsum, H2SO4, HCl and CaCl2). The treatments were arranged in randomized complete block design with four replication. Two crops viz; rice (kharif 1982) and wheat (Rabi 1982-83) were raised on these plots and were analysed for available phosphorus and potassium. The availability of soil phosphorus increased with acids and was decreased with calcium-containing materials. Increase in depth caused a significant decrease in available phosphorus. Availability of potassium increased after rice crops, however, it decreased after wheat crop. The potassium content was higher in upper layer compared to lower one.