Characterization of Lahar and Black Sand Laden Soil Towards Improving Soil Productivity In Botolan, Zambales


  • Nestor D. Pagaduan
  • Jeam D. Catague
  • Nenita E. Dela Cruz
  • Maria Excelsis Magpantay Orden Central Luzon State University
  • Angelo C. Fermil
  • Elmer P. Natividad
  • Edzel M. Umadhay
  • Ronber V. Obena
  • Edwin E. Elane
  • Lorenzo M. Jacinto, Jr.
  • Emman E. Ramos


lahar, Mt. Pinatubo, productivity, soil characteristics, Zambales


Years after the eruption of the Mt. Pinatubo and the 2005 flooding covered vast areas in Botolan, Zambales with ash, lahar, and blacksand.  This study characterized the soil in the marginal areas to serve as basis in identifying measures to regain land productivity.  Moreover, there is a need to assess soil and farm resources characteristics, crop suitability, and current land utilization of the affected areas to generate appropriate crop production technologies. The map of Botolan was derived from the Philippines' digital map using the Geographic Information System (GIS) program. Nine sites from two barangays were chosen and plotted using Global Positioning System  (GPS). Soil morphological characterization, land capability classification and land productivity index were determined based on appropriate measurement techniques. The disasters resulted in most soil covered with gravel and sand with low water content,  and available phosphorous and organic nitrogen was low for plant growth. Crop suitability evaluation showed crop production to be marginal to not suitable because of limitations such as stoniness, drainage, water availability, soil texture, and soil nutrient.

Author Biography

Maria Excelsis Magpantay Orden, Central Luzon State University

Research Office, Professor


Carating, R., Manguerra, J., & Samalca, I. (2008). Geographic Extent of Mt. Pinatubo Volcanic-Ash Influenced Soils Using Remote Sensing: A Time Series Study on Soil Formation and Development. 2008 International Conference of the Southeast Asian Geography Association. Quezon City, Philippines:

CLARRDEC. (1993). Proceedings of the Symposium on Agricultural Research Information for Mt. Pinatubo Affected Areas. CLARRDEC (p. 292). Science City of Munoz, Nueva Ecija.

Cornell University Cooperative Extension (n.d.). Agronomy Fact Sheet Series: Soil Organic Matter. Retrieved from Cornell Cooperative Extension: Franklin County:

Dar, W. D. (1993). In Proceedings of the Symposium on Agricultural Research Information for Mt. Pinatubo Affected Areas. CLARRDEC (p. 292). Science City of Munoz, Nueva Ecija.

Dengiz, O. & Saglam, M. (2012). Determination of land productivity index based on parametric approach using GIS Technique. Eurasian Journal of Soil Science, 51-57

Food and Agriculture Organization of the United Nations (FAO) (2006). Guidelines for Soil Descriptio: Fourth Edition. Rome: FAO

Fiegalan, F., Juico, P., Mactal, A., Mason, M., & Perez, F. (2017). Soil survey, Classification and Land Use (SO 201). Department of Soil Science, College of Agriculture, Central Luzon State University. Science City of Muñoz, Philippines

Orden, E.A., Cruz, E.M., Orden, M.E.M., & Fujihara, T. (n.d). Mineral profile of Forages and its Influence on goat Nutrition. Central Luzon State University, Science City of Munoz, Nueva Ecija.

Orense, R. P., Dr. Eng., P. E. & Zapanta, A. Jr. (2002). Strength and deformation characteristics of re-deposited lahar from Mt. Pinatubo. Philippine Engineering Journal. XXIII (1): 77-100

Provin, T. L., & Pitt, J. L. (2002). Description of Water Analysis Parameters. Texas A&M AgriLife Extension.

Reyes R.Y & Neue, H.U. (1991). Characterization of the Volcanic Ejecta from Mount Pinatubo and Its Impact on Rice Production. Philippine Journal Crop Science 1991. 16(2) 69-73

Sasaki, R., M. Yoshida, Y. Ohts, M. Miyahira, H. Ohta, M. Watanabe, & S. Suzuki. (2003). Soil Formation of New Lahar Materials Derived from Mt. Pinatubo. Soil Genesis, Classification and Survey. Soil Science and Plant Nutrition. Volume 49, Issue 4. Pages 575-582

SUYAT, M.N., R.T. Lacson, And A.J. Bayot. 1993. Adaptability of Different Field Crops under lahar-laden soils. Proceedings in the Symposium on Agricultural Research Information for Mt. Pinatubo Affected Areas (1993). 1-38.

USDA Natural Resources Conservation Service (n.d). Sampling Soils for Nutrient Management. Retrieved from United States Department of Agriculture (USDA):

Soil Science Division Staff (n.d.). SSM - Ch. 3. Examination and Description of Soil Profiles. Retrieved from United States Department of Agriculture (USDA):

Van Hoose, A., Strech, M., Pallister, J., & Walle, M. (2013). Sulfur evolution of the 1991 Pinatubo magmas based on apatite. Journal of Volcanology and Geothermal Research, 72-89.