TY - BOOK AU - Clarke,George Robin TI - The study of the soil in the field U1 - 631.47 20 PY - 1957/// CY - Oxford PB - Clarendon Press KW - Soils KW - Research KW - Soil surveys N1 - Contents Soil site characteristics Soil profile pit Soil sampling Soil survey and mapping The use of air photographs for soil survey purposes Main points in some systems of soil mapping and classification; Includes index ER -