Keys to Soil Taxonomy came in the year of

Solution (By Examveda Team)

Keys to soil taxonomy came in the year 1990 and developed under the leadership of Dr. Guy Smith. Soil taxonomy is a hierarchical soil classification system with six categories or levels that are order, suborder, great group, subgroup, family and series. It is a morphogenetic soil classification system using diagnostic horizons and features to infer pathways of soil genesis and formation.