caa a22 4500 469029951 CHVBK 20180323132740.0 cr unu---uuuuu 170328e19920701xx s 000 0 eng 10.1007/BF00402652 doi (NATIONALLICENCE)springer-10.1007/BF00402652 Ameyan Oluwole Department of Geography, University of Ilorin, Nigeria aut The use of parent material/slope positions as soil mapping units in irrigation soil surveys of Northern Nigeria [Elektronische Daten] [Oluwole Ameyan] The problems of different mapping units which hitherto formed the basis for irrigation soil surveys of the savanna landscapes in Nigeria are discussed. Using data from a semi-detailed soil survey, the possibility of establishing the major variations in soil properties which are relevant to irrigation by using a combination of parent material and slope position as mapping units are examined. In the mapping units considered, thirteen topsoil and eleven subsoil properties are significantly different between mapping units and have smaller variances within than between the mapping units. The variations of these topsoil and subsoil properties are also adequately accounted for by using parent material/slope position as a basis for mapping, suggesting that units based on parent material/slope position are of high utility for establishing the irrigation potentials of areas at the feasibility level of survey. Kluwer Academic Publishers, 1992 Environmental Monitoring and Assessment Kluwer Academic Publishers 22/1(1992-07-01), 1-13 0167-6369 22:1<1 1992 22 10661 https://doi.org/10.1007/BF00402652 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00402652 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Ameyan Oluwole Department of Geography, University of Ilorin, Nigeria aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Kluwer Academic Publishers 22/1(1992-07-01), 1-13 0167-6369 22:1<1 1992 22 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer