The experimental plots did not significantly differ in their initial K forms (total, exchangeable, and soil solution). The bulk density of peat soils depends on the amount of compaction, the botanical composition of the materials, their degree of decomposition, and the mineral and moisture contents at the time of sampling[16]. Bulk densities at the depths of 0–10, 10–25, and 25–45 cm were 0.16, 0.23 and 0.13 g cm–3, and were typical of Umbro Saprists peat soil[16].