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Tropical regions occur between the Tropic of Cancer and the Tropic of Capricorn. The tropics include approximately 40% of the land surface and is the largest ecozone of the earth. According to Köppen (1931), the tropics are characterized by an annual mean air temperature above 18°C through­out the whole year. The largest climatic variation is introduced by the variability of precipita­tion, reaching from nearly 0 mm in the Saharan and Atacama Desert to 11,700 mm on Mt. Waialeala in Hawaii (Eswaran et al., 1992). An Afisol (Luvisol) soil derived from mudstone in Eastern Samar, Philippines According to Uehara and Gillman  (1981), "t ropical soils" is a common name used to identify any soil that occurs in the tropics. They noted that like most common names, the term lacks precision, but it is more readily understood by a larger audience than are the scientific names. In contrast, Sanchez (1976) argued against the use of the term "tropical soils" since it does not accur

Prof. Dr. Reinhold Jahn , retired professor of soil science and soil protection at Martin Luther University (also known as University of Halle-Wittenberg), Germany was given the highest award called Sandigan Award (Sandigan means someone you can depend upon) of the Visayas State University (VSU), Baybay, Leyte. In a ceremony on 03 August 2016 at the office of the president, University President Edgardo E. Tulin handed the plaque of recognition to Prof. Jahn in the presence of Dr. Wolfreda T. Alesna, Chairperson of the Awards Committee and several faculty, staff, and students of the Department of Soil Science of VSU. Prof. Reinhold Jahn receiving the Sandigan Award from Univ President Edgardo E. Tulin Prof. Jahn was recognized “for his invaluable contributions to the Visayas State University. Since 1995 until his retirement in 2012, Prof. Jahn initiated exchange of students between his faculty in Halle and VSU. He mentored and served as host professor to some VSU academic staff and stud