Scientist Profile


Ian A. Navarrete

Environmental Soil Science, Outstanding Young Scientists(2016)

Expertise: Environmental Soil Science, Soil Carbon sequestration, Geochemistry, Soil pollution and remediation, Soil degradation, Soil genesis and classification, Greenhouse gas fluxes, Marginal uplands, Mechanisms of soil carbon stabilization, Land-­use change

Dr. Ian A. Navarrete was recognized as one of the Outstanding Young Scientists for 2016 by the National Academy of Science and Technology (NAST), the premier and most prestigious recognition and advisory body on science and technology in the Philippines. He was awarded for his outstanding achievements in Soil Science as reflected by his papers in international journals as well as by the prestigious research awards he has won. Dr. Navarrete as one of the Outstanding Young Scientists in 2016 (photo by IA Navarrete) Every year, NAST selects 12 recipients of the Outstanding Young Scientist (OYS) Awards who should be young Filipino scientist (below 41 years old) and who have made significant contributions to science and technology. Dr. Navarrete, who comes from Javier, Leyte, finished his BSA Soil Science and MSc in Soil Science from Visayas State University (VSU). He conducted his undergraduate and graduate theses under the supervision of V.B. Asio. For his MSc thesis on the characteristics and genesis of highly weathered soils from Samar, he spent four months performing mineralogical and elemental analyses at the Institute of Soil Science and Plant Nutrition, Martin Luther University, Germany (hosted by Prof. Reinhold Jahn) with scholarship support from the German Academic Exchange Service (DAAD). The thesis discovered the occurrence of an Oxisol in Samar. With members of the pedology group of VSU during the field work for his postdoctorate research He then pursued his doctorate degree at Obihiro University of Agriculture and Veterinary Medicine, Japan, and then went to the University of Goettingen, Germany, for his postdoctorate as an Alexander von Humboldt Research Fellow, a highly competitive and world-renowned fellowship. The field studies for his doctoral dissertation and postdoctorate research were conducted in Leyte in collaboration with the Pedology and Geo-ecology Laboratory (V.B. Asio) at VSU. Since 2015, Dr. Navarrete is an Assistant Professor at Ateneo de Manila University.


Assistant Professor, Department of Environmental Science, Ateneo de Manila University Loyola Heights, Quezon City


    • Georg-¬≠August University of Goettingen, Germany, Post-doctorate in Soil Science, Soil Science of Tropical & Subtropical Ecosystems
    • United Graduate School of Agricultural Sciences, Iwate University, Japan, Doctor of Philosophy in Science of Bioproduction (Soil Science)


    • Navarrete, I.A., & Tsutsuki, K., (2015) Chemical and Spectroscopic Properties of Soil Hydrophilic Fulvic Acid Purified by Tangential Flow Ultrafiltration
    • Clean Soil Air Water Volume 43, No. 7
    • Navarrete, I.A., & Asio, V.B., (2014) Research productivity in soil science in the Philippines
    • Scientometrics Volume 100
    • Navarrete, I.A., Tsutsuki, K., & Asio, V.B., (2013) Characteristics and fertility constraints of some degraded soils in Leyte, Philippines
    • Archives of Agronomy & Soil Science Volume 59
    • Navarrete, I.A., Tsutsuki, K., Asio, V.B., Masayuki, T., & Sueta, J., (2011) Chemical, mineralogical and morphological characteristics of a late Quaternary sedimentary­-rock derived soils in Leyte, Philippines
    • Soil Science Volume 176
    • Navarrete, I.A., & Asio, V.B., (2011) Heavy metals content of two red soils in Samar
    • Annals of Tropical Research Volume 33
    • Navarrete, I.A., Tsutsuki, K., & Navarrete, R., (2010) Humus composition and the structural characteristics of humic substances in soils under different land uses in Leyte, Philippines
    • Soil Science & Plant Nutrition Volume 56, No. 2-2
    • Susaya, J.P., Kim, K.H., Asio, V.B., Chen, Z.S., & Navarrete, I.A., (2009) Quantifying nickel in soils and plants in an ultramafic area in the Philippines
    • Environmental Monitoring Assessment Volume 167, No. 1-4
    • Asio, V.B., Jahn, R., Perez, F.O., Navarrete, I.A., & Abit, S.M., Jr., (2009) A review of soil degradation in the Philippines
    • Annals of Tropical Research Volume 31
    • Navarrete, I.A., Macalde, S.O., & Asio, V.B., (2009) Nutrient characteristics of aggregates and rhizosphere of a degraded upland: implication for soil fertility evaluation
    • Annals of Tropical Research Volume 31
    • Navarrete, I.A., Tsutsuki, K., Asio, V.B., & Kondo, R., (2009) Characteristics and formation of rain forest soils derived from late Quaternary basaltic rocks in Leyte, Philippines
    • Environmental Geology Volume 58
    • Sakamoto, N., Tani, M., Navarrete, I.A., Koike, M., & Umetsu, K., (2008) Covering dairy slurry stores with hydrophobic fertilisers reduces greenhouse gases and other polluting gas emissions
    • Australian Journal of Experimental Agriculture Volume 48, No. 2
    • Navarrete, I.A., Tsutsuki, K., Kondo, R., & Asio, V.B., (2008) Genesis of soils across a late Quaternary volcanic landscape in the humid tropical island of Leyte, Philippines
    • Journal of Soil Research Volume 46
    • Navarrete, I.A., & Tsutsuki, K., (2008) Land-use impact on soil carbon, nitrogen, neutral sugar composition and related chemical properties in a degraded Ultisol Derived From Volcanic Materials in Leyte, Philippines
    • Soil Science & Plant Nutrition Volume 54, No. 3
    • Navarrete, I.A., Asio, V.B., Jahn, R., & Tsutsuki, K., (2007) Characteristics and genesis of two highly weathered soils in Samar, Philippines
    • Australian Journal of Soil Research Volume 45
    • Navarrete, I.A., Asio, V.B., Balbarino, E., & Tulin, A., (2000) The physico-chemical properties of rhizosphere soil grown to vetiver in a degraded upland
    • Grassland Society of the Philippines Journal Volume 4
    • Navarrete, I., Lina, S., Corre, M., Veldkamp, E., & Asio, V., (2013) Soil organic matter dynamics and mechanisms of carbon stabilization in soils with conversion from secondary forest to grassland in central Philippines
    • Geophysical Research Abstracts Volume 15
    • Dicen, G.P., Navarrete, I.A., Rallos, R.V., Salmo, S.G., III, & Garcia, M.C.A., (2019) The role of reactive iron in long-term carbon sequestration in mangrove sediments
    • Journal of Soils and Sediments Volume 19, No. 1
    • Navarrete, I.A., Dicen, G.P., Perez, T.R., Mendoza, S.M., Rallos, R.V., Labides, J.L.R., Rivera, C.T., Hallare, A.V., & Claveria, R.J.R., (2019) Towards integrated management of a shallow tropical lake: assessment of water quality, sediment geochemistry, and phytoplankton diversity in Lake Palakpakin, Philippines
    • Environmental Monitoring and Assessment Volume 191