Part 1 Introduction: aims and scope of the manual; selection of contents; layout of the manual; the need for soil surveys. Part 2 Types of land resource field studies: exploratory surveys; reconnaissance surveys; semi-detailed surveys; detailed surveys; the role of land resource surveys in integrated projects; limitations of land resource surveys. Part 3 Survey organization and practice: terms of reference; background data; survey logistics and planning; general guidelines for survey planning; survey techniques; data recording; soil sampling; field laboratories. Part 4 Classification and mapping of soils: soil classification; soil mapping units. Part 5 Land Evaluation: land suitability classification; land capability classification; field evaluation of agronomic potential; productivity indices or ratings. Part 6 Soil physics: background to soil physical measurements; infiltration; hydraulic conductivity; bulk density; soil porosity; soil-water relations; soil particle density; soil structure, strength and consistency; soil texture and particle size distribution. Part 7 Soil chemistry: problems in interpretation of soil chemical measurements; variability f of soil analytical results; summary of soil chemical data interpretation; soil reaction (pH); cation-exchange capacity; individual exchangeable cations; phosphorus; nitrogen; organic carbon; free carbonate; gypsum; sulphur; micronutrients; trace elements - chronium, cobalt, iodine, nickel, selenium and silicon. Part 8 Soil and water salinity and sodicity: electrical conductivity; sodium measurements; definitions of saline and sodic soils; salinity and sodicity of irrigation water; soluble salts - saturation extract; leaching requirement; soil classification and salinity/sodicity. Part 9 Soil and land suitability reports and maps: the purpose and use of soil and land suitability reports; quality of soil and land suitability reports; writing soil and land suitability reports; soil and land suitability maps.