Comparing Uganda's indigenous soil classification system with World Reference Base and USDA Soil Taxonomy to predict soil productivity

Thumbnail Image
Date
2020-09-01
Authors
Miller, Bradley
Semalulu, Onesimus
Tenywa, Moses
Lenssen, Andrew
Kyomuhendo, Prossy
Smith, Christopher
Luswata, Charles
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Person
Miller, Bradley
Associate Professor
Person
Lenssen, Andrew
Professor Emeritus
Person
Burras, C.
Morrill Professor
Research Projects
Organizational Units
Organizational Unit
Organizational Unit
Journal Issue
Is Version Of
Versions
Series
Department
SociologyAgronomy
Abstract

This study examines three soil classification systems - Buganda, World Reference Base, and US Soil Taxonomy - in order to evaluate their relative strengths and feasibility for making linkages between them. Nine field sites and 16 pedons were considered across the soil landscapes of the Buganda catena. Each identified field pedon diagnostic horizons and characteristics were described and their soils analyzed using standard pedological techniques and measurements. To document the indigenous use of the Buganda classification system, interviews and discussions were held with farmer groups and local extension specialists. Using this local expertise, five local soil units were identified. We also identified two landscape toposequences with pedons that classified into six WRB Reference Soil Groups and five US Soil Taxonomic Suborders. While four local soil classes each mismatched with international systems' groups, Liddugavu (black) soil corresponded to Phaeozem (WRB) and Udolls (US Soil Taxonomy) and is consistently viewed as the most productive soil due to faster weed growth, diversity of crops it supports and its stable landscape location. Statistical comparisons indicated that the Buganda classes were more homogeneous and effective at separating variability of different soil properties than those of either the WRB Reference Soil Groups or US Soil Taxonomy Suborders. Integrating soil texture, pH and bases information in indigenous system methods could locally complement international classifications and linking the best of both systems would be ideal for the generation of a hybrid system. Our findings show that using the toposequence framework assists in comparing these systems in a way that is useful for scientists and local farmers.

Comments

This article is published as Kyebogola, Stewart, Lee C. Burras, Bradley A. Miller, Onesimus Semalulu, Russell S. Yost, Moses M. Tenywa, Andrew W. Lenssen et al. "Comparing Uganda's indigenous soil classification system with world Reference Base and soil taxonomy." Geoderma Regional 22 (2020): e00296. doi: 10.1016/j.geodrs.2020.e00296.

Description
Keywords
Citation
DOI
Copyright
Wed Jan 01 00:00:00 UTC 2020
Collections