Abstract:
Understanding the nature of the soil is very important to know the potential and the proper management of the soil.
This study aimed to determine the differences in morphological, physical, and chemical properties of the soils developing
from gabbro, phylitte and chert parent rock. The soil profile was made to represent each parent rock of gabbro, phyllite
and chert located on the upper and middle slopes with pine-dominated vegetation and mixed gardens. Observation in the
field is a professional description to observe soil morphology. Soil samples were taken at each horizon to analyze soil
physical properties (bulk density, particle density, and texture), soil chemical properties (pH, exchanged cations, cation
exchange capacity, available P, organic C, and total N). Texture analysis results showed that clay content of the soil
developing from parent rock of Gabro 1 is the highest, followed by the soil clay content from Chert 1, Phyllite 1,
Chert 2, Phyllite 2, and Gabbro 2, respectively. The order of soil acidity level (pH) is Gabbro 2 > Gabbro 1> Chert 1
~ Chert 2 > Phyllite 1 ~ Phyllite 2. Meanwhile, the order of the cation exchange capacity is Gabbro 1> Gabbro 2>
Phyllite 1> Chert 1> Phyllite 2> Chert 2, and the order of the base saturation is Chert 2> Gabbro 2> Chert 1> Phyllite
2 > Phyllite1> Gabbro 1.
Keywords: chert, gabbro, Karangsambung, phyllite, rock, soil properties
