Authors

Eric John D. Florida

Author

Garry C. Marapao

Co-author

Renato D. Boniao

Co-author

College of Agriculture and Forestry, Mindanao State University at Naawan, Naawan, Misamis Oriental, Philippines

*Corresponding author: [email protected]

ABSTRACT

There are several ophiolite complexes in the Philippines that serve as the birthplace of serpentinite derived soils which are generally described as infertile soils. In the northern part of Mindanao Island of the country a rainforest which sustains wild life and protects a vast watershed sits on this serpentinite environment. Thus, a study was made to assess the soil chemical properties in order to help in understanding the present condition of this forest. Soil samples were collected from four sites with different elevations but of similar topography. Soil samples were subjected to laboratory analysis for pH, organic matter content, total nitrogen, extractable phosphorous, exchangeable potassium and cation exchange capacity. Based on the values of the different soil chemical properties measured, soil fertility index was calculated. Result showed that there is significant variation of different soil chemical properties among sites. Soil fertility index among sites also varies and had showed low fertility index.