Agroforestry Systems

, Volume 8, Issue 3, pp 217–238 | Cite as

Agroforestry systems and soil surface management of a tropical alfisol:

V. Water infiltrability, transmissivity and soil water sorptivity


Soil infiltrability was evaluated once a year for five consecutive years in a longterm agroforestry experiment established on an Alfisol in western Nigeria. There were 6 treatments involving plow-till, no-till, contour hedges of Leucaena Leucocephala and Gliricidia sepium established every 4- and 2-m intervals. Continuous cultivation based on 2 crops per year caused drastic reductions in infiltrability in all treatments. The rate of decline was, however, the most severe in no-till treatment. Following 5 years of continuous cultivation, the equilibrium infiltration rate was 8, 19, 21 and 24 cm/h for no-till, Gliricidia-based, plow-till and Leucaena-based treatments, respectively. The cumulative infiltration at 2 h was 24, 59, 70 and 76 cm for no-till, Gliricidia-based, Leucaena-based and plow-till treatments. There were also significant differences among treatments in relation to soil water sorptivity (S). The infiltration data were expressed in terms of Philip's and Kostiakov's infiltration models.

Key words

Soil structure hydraulic conductivity biopores physical degradation infiltration models 


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Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • R. Lal
    • 1
  1. 1.Department of AgronomyThe Ohio State UniversityColumbusUSA

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