In the semi-arid northern boundary zone of Nigeria encompassing Sokoto and Katsina states, agricultural land faces severe degradation driven primarily by wind erosion and topsoil desiccation. Considering the pedological profile and environmental conditions of this region, which option correctly pairs the prevailing soil characteristics with the most effective soil conservation strategy?
- Coarse, weakly structured sandy soils with low organic humus and minimal water-retention capacity; managed by establishing multi-row shelterbelts of drought-tolerant trees perpendicular to prevailing winds.Cevap
- BHeavily leached, acidic reddish soils rich in iron oxide; managed by constructing high-altitude bench terraces to prevent rapid down-slope mass wasting along valley sides.
- CDark, poorly drained hydromorphic clay soils; managed by constructing deep surface drainage canals to eliminate waterlogging and soil salinity during rainstorms.
- DHumus-rich tropical forest soils derived from volcanic parent rocks; managed by periodic controlled bush burning to restore mineral ash to the topsoil layer.
Cevap
Coarse, weakly structured sandy soils with low organic humus and minimal water-retention capacity; managed by establishing multi-row shelterbelts of drought-tolerant trees perpendicular to prevailing winds.
The northern extremity of Nigeria features semi-arid conditions where wind erosion dominates. The soil is predominantly coarse, sandy Regosol with low moisture retention. Establishing shelterbelts creates windbreaks that effectively halt topsoil loss and preserve land productivity.
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Anahtar Kavram
Zonal distribution of Nigerian Regosols and wind erosion conservation techniques
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