Soil acidity is one of the most important factors affecting crop growth and, ultimately, yield and profitability. Soil pH directly affects the life and growth of plants because it affects the availability of all plant nutrients. This problem can be corrected with the use of lime. The study aimed to determine the effects of filter cake and agricultural lime as liming materials under marginal soil conditions of CSU-Piat. The pH value after application ranged from 5.27 to 7.03 as compared to the initial pH value ranging from 5.0 to 5.03. All the treatments recorded higher soil pH values as compared to the initial soil. Among the two limes tested, agricultural lime (CaCO3) can be comparable to filter cake since they did not differ significantly from each other in most of the data gathered. Organic matter content of the post-harvest soils varied from 0.94 – 1.22% which is considerably higher than the initial value of 28%. Available P content in the post-harvest soils ranged from 2.57 to 3.24 ppm. The P availability in soil was highly pH-dependent, while a tremendous increase in the K content was recorded from 26.66 – 38.88 ppm. Dolomite (CaCO3) and filter cake as sources of lime can be used to reduce the acidity level and raise the pH level of soils since they do not differ significantly from each other. The filter cake is recommended as an alternative source of lime in marginal soil.
