Citation
Azeez J. O., . and Ojewande B. O., . and Olayinka O. O., . and Adesodun J. K., . Impact assessment of organic farming on soil nutrients and heavy metal content. pp. 1811-1831. ISSN 1511-3701
Abstract
Environmental sustainability of recent adoption of organic farming as a wholesome practice in sub-Saharan Africa needs to be investigated in order to guide agricultural policy makers. Consequently an assessment of soil chemical properties was done in an organic farm with different land uses. The experiment was 5 3 factorial design (five land uses and three soil depths) replicated temporally (two contrasting seasons) and spatially (four replications). Samples collected systematically at 0 - 20 20 - 40 and 40 - 60 cm depths were analysed for pH organic carbon nutrients and heavy metals. Results indicated that manure application limed the soil. Soil pH ranged from 5.1 to 6.3 in grass-land and 5.8 to 6.4 in amaranth farm during dry and wet seasons respectively. Generally nutrients and heavy metals were concentrated at 0-20 cm depth. The effect of season on the parameters was erratic. Amounts of mobile exchangeable and labile Cu were 0.13 - 0.19 0.07 - 0.15 and 1.39 - 1.74 mg kg- respectively while water soluble and mobile fraction Zn ranged from 0.15 - 0.20 and 0.29 “ 0.62 mg kg-. Comparatively all the metals labile pool was most abundant while Pb was the most abundant metal. There was no evidence of heavy metal accumulation in the organic system.
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Abstract
Environmental sustainability of recent adoption of organic farming as a wholesome practice in sub-Saharan Africa needs to be investigated in order to guide agricultural policy makers. Consequently an assessment of soil chemical properties was done in an organic farm with different land uses. The experiment was 5 3 factorial design (five land uses and three soil depths) replicated temporally (two contrasting seasons) and spatially (four replications). Samples collected systematically at 0 - 20 20 - 40 and 40 - 60 cm depths were analysed for pH organic carbon nutrients and heavy metals. Results indicated that manure application limed the soil. Soil pH ranged from 5.1 to 6.3 in grass-land and 5.8 to 6.4 in amaranth farm during dry and wet seasons respectively. Generally nutrients and heavy metals were concentrated at 0-20 cm depth. The effect of season on the parameters was erratic. Amounts of mobile exchangeable and labile Cu were 0.13 - 0.19 0.07 - 0.15 and 1.39 - 1.74 mg kg- respectively while water soluble and mobile fraction Zn ranged from 0.15 - 0.20 and 0.29 “ 0.62 mg kg-. Comparatively all the metals labile pool was most abundant while Pb was the most abundant metal. There was no evidence of heavy metal accumulation in the organic system.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Organic farming |
| AGROVOC Term: | Field experiments |
| AGROVOC Term: | Manures (fertilizers) |
| AGROVOC Term: | Soil chemicophysical properties |
| AGROVOC Term: | Dry season |
| AGROVOC Term: | Wet season |
| AGROVOC Term: | Heavy metals |
| AGROVOC Term: | Organic compounds |
| AGROVOC Term: | Nutrient availability (soil) |
| AGROVOC Term: | Soil alkalinity |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 06:29 |
| URI: | http://webagris.upm.edu.my/id/eprint/24894 |
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