Organic matter and soil fertility restoration in forest and savanna fallows in southwestern Nigeria
Abstract This paper compares the trend and relative importance in soil fertility restoration, of organic matter build-up in forest and derived savanna fallow soils in parts of SW Nigeria. The analysis of the trend of organic matter build-up in each area was based on the comparison of the mean levels...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Areola, O. [verfasserIn] |
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| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1982 |
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| Schlagwörter: |
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| Anmerkung: |
© Akademische Verlagsgesellschaft 1982 |
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| Übergeordnetes Werk: |
Enthalten in: GeoJournal - Kluwer Academic Publishers, 1977, 6(1982), 2 vom: März, Seite 183-192 |
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| Übergeordnetes Werk: |
volume:6 ; year:1982 ; number:2 ; month:03 ; pages:183-192 |
| Links: |
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| DOI / URN: |
10.1007/BF00185541 |
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| Katalog-ID: |
OLC2113646951 |
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| 520 | |a Abstract This paper compares the trend and relative importance in soil fertility restoration, of organic matter build-up in forest and derived savanna fallow soils in parts of SW Nigeria. The analysis of the trend of organic matter build-up in each area was based on the comparison of the mean levels of soil organic matter in fallow soils of different ages as well as the comparison of those mean values with the equilibrium level of organic matter that is attainable in soils under the climax vegetation in each ecological zone. Intercorrelations between all the soil properties were computed in order to assess the relative importance of soil organic matter vis-avis soil intrinsic properties in soil fertility restoration during the fallow period. The significance of improvements in soil conditions with length of fallow was tested by computing correlation coefficients between age of fallow and soil properties. With regard to the forest fallow soils the results show that there is a progressive build-up of organic matter over the years. The build-up is very rapid initially and by the tenth year of the fallow period the organic matter in the soils has attained 77 % of the equilibrium level. Thereafter, the rate slows down as the equilibrium level is approached. Compared with soil textural composition, organic matter exercises a greater influence on other soil properties and, therefore, on soil fertility regeneration during the fallow period. In the case of the derived savanna fallows the trend of organic matter build-up and of improvements in soil conditions with length of fallow is rather erratic. There is not as strong a correlation between age of fallow and improvements in soil organic matter content and other soil properties as in the forest region. The build-up of organic matter in the savanna fallow soils is rather slow and fortuitous. This is probably due to the smaller vegetation biomass and the annual burning of the bush and the soil litter layer. The slower rate of organic matter build-up in savanna fallow soils can also be explained in terms of the lower equilibrium level. In contrast to the situation in the forest region the influence of soil textural properties appears to be greater than that of the organic matter in soil fertility regeneration. | ||
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10.1007/BF00185541 doi (DE-627)OLC2113646951 (DE-He213)BF00185541-p DE-627 ger DE-627 rakwb eng 550 VZ 14 ssgn BIODIV DE-30 fid Areola, O. verfasserin aut Organic matter and soil fertility restoration in forest and savanna fallows in southwestern Nigeria 1982 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Akademische Verlagsgesellschaft 1982 Abstract This paper compares the trend and relative importance in soil fertility restoration, of organic matter build-up in forest and derived savanna fallow soils in parts of SW Nigeria. The analysis of the trend of organic matter build-up in each area was based on the comparison of the mean levels of soil organic matter in fallow soils of different ages as well as the comparison of those mean values with the equilibrium level of organic matter that is attainable in soils under the climax vegetation in each ecological zone. Intercorrelations between all the soil properties were computed in order to assess the relative importance of soil organic matter vis-avis soil intrinsic properties in soil fertility restoration during the fallow period. The significance of improvements in soil conditions with length of fallow was tested by computing correlation coefficients between age of fallow and soil properties. With regard to the forest fallow soils the results show that there is a progressive build-up of organic matter over the years. The build-up is very rapid initially and by the tenth year of the fallow period the organic matter in the soils has attained 77 % of the equilibrium level. Thereafter, the rate slows down as the equilibrium level is approached. Compared with soil textural composition, organic matter exercises a greater influence on other soil properties and, therefore, on soil fertility regeneration during the fallow period. In the case of the derived savanna fallows the trend of organic matter build-up and of improvements in soil conditions with length of fallow is rather erratic. There is not as strong a correlation between age of fallow and improvements in soil organic matter content and other soil properties as in the forest region. The build-up of organic matter in the savanna fallow soils is rather slow and fortuitous. This is probably due to the smaller vegetation biomass and the annual burning of the bush and the soil litter layer. The slower rate of organic matter build-up in savanna fallow soils can also be explained in terms of the lower equilibrium level. In contrast to the situation in the forest region the influence of soil textural properties appears to be greater than that of the organic matter in soil fertility regeneration. Organic Matter Soil Organic Matter Soil Property Nigeria Soil Organic Matter Content Aweto, A. O. aut Gbadegesin, A. S. aut Enthalten in GeoJournal Kluwer Academic Publishers, 1977 6(1982), 2 vom: März, Seite 183-192 (DE-627)13044555X (DE-600)715360-0 (DE-576)015981851 0343-2521 nnns volume:6 year:1982 number:2 month:03 pages:183-192 https://doi.org/10.1007/BF00185541 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_22 GBV_ILN_24 GBV_ILN_40 GBV_ILN_70 GBV_ILN_72 GBV_ILN_130 GBV_ILN_267 GBV_ILN_2003 GBV_ILN_2006 GBV_ILN_2009 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2315 GBV_ILN_4012 GBV_ILN_4029 GBV_ILN_4036 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4082 GBV_ILN_4103 GBV_ILN_4126 GBV_ILN_4251 GBV_ILN_4306 GBV_ILN_4311 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4700 AR 6 1982 2 03 183-192 |
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10.1007/BF00185541 doi (DE-627)OLC2113646951 (DE-He213)BF00185541-p DE-627 ger DE-627 rakwb eng 550 VZ 14 ssgn BIODIV DE-30 fid Areola, O. verfasserin aut Organic matter and soil fertility restoration in forest and savanna fallows in southwestern Nigeria 1982 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Akademische Verlagsgesellschaft 1982 Abstract This paper compares the trend and relative importance in soil fertility restoration, of organic matter build-up in forest and derived savanna fallow soils in parts of SW Nigeria. The analysis of the trend of organic matter build-up in each area was based on the comparison of the mean levels of soil organic matter in fallow soils of different ages as well as the comparison of those mean values with the equilibrium level of organic matter that is attainable in soils under the climax vegetation in each ecological zone. Intercorrelations between all the soil properties were computed in order to assess the relative importance of soil organic matter vis-avis soil intrinsic properties in soil fertility restoration during the fallow period. The significance of improvements in soil conditions with length of fallow was tested by computing correlation coefficients between age of fallow and soil properties. With regard to the forest fallow soils the results show that there is a progressive build-up of organic matter over the years. The build-up is very rapid initially and by the tenth year of the fallow period the organic matter in the soils has attained 77 % of the equilibrium level. Thereafter, the rate slows down as the equilibrium level is approached. Compared with soil textural composition, organic matter exercises a greater influence on other soil properties and, therefore, on soil fertility regeneration during the fallow period. In the case of the derived savanna fallows the trend of organic matter build-up and of improvements in soil conditions with length of fallow is rather erratic. There is not as strong a correlation between age of fallow and improvements in soil organic matter content and other soil properties as in the forest region. The build-up of organic matter in the savanna fallow soils is rather slow and fortuitous. This is probably due to the smaller vegetation biomass and the annual burning of the bush and the soil litter layer. The slower rate of organic matter build-up in savanna fallow soils can also be explained in terms of the lower equilibrium level. In contrast to the situation in the forest region the influence of soil textural properties appears to be greater than that of the organic matter in soil fertility regeneration. Organic Matter Soil Organic Matter Soil Property Nigeria Soil Organic Matter Content Aweto, A. O. aut Gbadegesin, A. S. aut Enthalten in GeoJournal Kluwer Academic Publishers, 1977 6(1982), 2 vom: März, Seite 183-192 (DE-627)13044555X (DE-600)715360-0 (DE-576)015981851 0343-2521 nnns volume:6 year:1982 number:2 month:03 pages:183-192 https://doi.org/10.1007/BF00185541 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_22 GBV_ILN_24 GBV_ILN_40 GBV_ILN_70 GBV_ILN_72 GBV_ILN_130 GBV_ILN_267 GBV_ILN_2003 GBV_ILN_2006 GBV_ILN_2009 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2315 GBV_ILN_4012 GBV_ILN_4029 GBV_ILN_4036 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4082 GBV_ILN_4103 GBV_ILN_4126 GBV_ILN_4251 GBV_ILN_4306 GBV_ILN_4311 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4700 AR 6 1982 2 03 183-192 |
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10.1007/BF00185541 doi (DE-627)OLC2113646951 (DE-He213)BF00185541-p DE-627 ger DE-627 rakwb eng 550 VZ 14 ssgn BIODIV DE-30 fid Areola, O. verfasserin aut Organic matter and soil fertility restoration in forest and savanna fallows in southwestern Nigeria 1982 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Akademische Verlagsgesellschaft 1982 Abstract This paper compares the trend and relative importance in soil fertility restoration, of organic matter build-up in forest and derived savanna fallow soils in parts of SW Nigeria. The analysis of the trend of organic matter build-up in each area was based on the comparison of the mean levels of soil organic matter in fallow soils of different ages as well as the comparison of those mean values with the equilibrium level of organic matter that is attainable in soils under the climax vegetation in each ecological zone. Intercorrelations between all the soil properties were computed in order to assess the relative importance of soil organic matter vis-avis soil intrinsic properties in soil fertility restoration during the fallow period. The significance of improvements in soil conditions with length of fallow was tested by computing correlation coefficients between age of fallow and soil properties. With regard to the forest fallow soils the results show that there is a progressive build-up of organic matter over the years. The build-up is very rapid initially and by the tenth year of the fallow period the organic matter in the soils has attained 77 % of the equilibrium level. Thereafter, the rate slows down as the equilibrium level is approached. Compared with soil textural composition, organic matter exercises a greater influence on other soil properties and, therefore, on soil fertility regeneration during the fallow period. In the case of the derived savanna fallows the trend of organic matter build-up and of improvements in soil conditions with length of fallow is rather erratic. There is not as strong a correlation between age of fallow and improvements in soil organic matter content and other soil properties as in the forest region. The build-up of organic matter in the savanna fallow soils is rather slow and fortuitous. This is probably due to the smaller vegetation biomass and the annual burning of the bush and the soil litter layer. The slower rate of organic matter build-up in savanna fallow soils can also be explained in terms of the lower equilibrium level. In contrast to the situation in the forest region the influence of soil textural properties appears to be greater than that of the organic matter in soil fertility regeneration. Organic Matter Soil Organic Matter Soil Property Nigeria Soil Organic Matter Content Aweto, A. O. aut Gbadegesin, A. S. aut Enthalten in GeoJournal Kluwer Academic Publishers, 1977 6(1982), 2 vom: März, Seite 183-192 (DE-627)13044555X (DE-600)715360-0 (DE-576)015981851 0343-2521 nnns volume:6 year:1982 number:2 month:03 pages:183-192 https://doi.org/10.1007/BF00185541 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_22 GBV_ILN_24 GBV_ILN_40 GBV_ILN_70 GBV_ILN_72 GBV_ILN_130 GBV_ILN_267 GBV_ILN_2003 GBV_ILN_2006 GBV_ILN_2009 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2315 GBV_ILN_4012 GBV_ILN_4029 GBV_ILN_4036 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4082 GBV_ILN_4103 GBV_ILN_4126 GBV_ILN_4251 GBV_ILN_4306 GBV_ILN_4311 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4700 AR 6 1982 2 03 183-192 |
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10.1007/BF00185541 doi (DE-627)OLC2113646951 (DE-He213)BF00185541-p DE-627 ger DE-627 rakwb eng 550 VZ 14 ssgn BIODIV DE-30 fid Areola, O. verfasserin aut Organic matter and soil fertility restoration in forest and savanna fallows in southwestern Nigeria 1982 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Akademische Verlagsgesellschaft 1982 Abstract This paper compares the trend and relative importance in soil fertility restoration, of organic matter build-up in forest and derived savanna fallow soils in parts of SW Nigeria. The analysis of the trend of organic matter build-up in each area was based on the comparison of the mean levels of soil organic matter in fallow soils of different ages as well as the comparison of those mean values with the equilibrium level of organic matter that is attainable in soils under the climax vegetation in each ecological zone. Intercorrelations between all the soil properties were computed in order to assess the relative importance of soil organic matter vis-avis soil intrinsic properties in soil fertility restoration during the fallow period. The significance of improvements in soil conditions with length of fallow was tested by computing correlation coefficients between age of fallow and soil properties. With regard to the forest fallow soils the results show that there is a progressive build-up of organic matter over the years. The build-up is very rapid initially and by the tenth year of the fallow period the organic matter in the soils has attained 77 % of the equilibrium level. Thereafter, the rate slows down as the equilibrium level is approached. Compared with soil textural composition, organic matter exercises a greater influence on other soil properties and, therefore, on soil fertility regeneration during the fallow period. In the case of the derived savanna fallows the trend of organic matter build-up and of improvements in soil conditions with length of fallow is rather erratic. There is not as strong a correlation between age of fallow and improvements in soil organic matter content and other soil properties as in the forest region. The build-up of organic matter in the savanna fallow soils is rather slow and fortuitous. This is probably due to the smaller vegetation biomass and the annual burning of the bush and the soil litter layer. The slower rate of organic matter build-up in savanna fallow soils can also be explained in terms of the lower equilibrium level. In contrast to the situation in the forest region the influence of soil textural properties appears to be greater than that of the organic matter in soil fertility regeneration. Organic Matter Soil Organic Matter Soil Property Nigeria Soil Organic Matter Content Aweto, A. O. aut Gbadegesin, A. S. aut Enthalten in GeoJournal Kluwer Academic Publishers, 1977 6(1982), 2 vom: März, Seite 183-192 (DE-627)13044555X (DE-600)715360-0 (DE-576)015981851 0343-2521 nnns volume:6 year:1982 number:2 month:03 pages:183-192 https://doi.org/10.1007/BF00185541 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_22 GBV_ILN_24 GBV_ILN_40 GBV_ILN_70 GBV_ILN_72 GBV_ILN_130 GBV_ILN_267 GBV_ILN_2003 GBV_ILN_2006 GBV_ILN_2009 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2315 GBV_ILN_4012 GBV_ILN_4029 GBV_ILN_4036 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4082 GBV_ILN_4103 GBV_ILN_4126 GBV_ILN_4251 GBV_ILN_4306 GBV_ILN_4311 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4700 AR 6 1982 2 03 183-192 |
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10.1007/BF00185541 doi (DE-627)OLC2113646951 (DE-He213)BF00185541-p DE-627 ger DE-627 rakwb eng 550 VZ 14 ssgn BIODIV DE-30 fid Areola, O. verfasserin aut Organic matter and soil fertility restoration in forest and savanna fallows in southwestern Nigeria 1982 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Akademische Verlagsgesellschaft 1982 Abstract This paper compares the trend and relative importance in soil fertility restoration, of organic matter build-up in forest and derived savanna fallow soils in parts of SW Nigeria. The analysis of the trend of organic matter build-up in each area was based on the comparison of the mean levels of soil organic matter in fallow soils of different ages as well as the comparison of those mean values with the equilibrium level of organic matter that is attainable in soils under the climax vegetation in each ecological zone. Intercorrelations between all the soil properties were computed in order to assess the relative importance of soil organic matter vis-avis soil intrinsic properties in soil fertility restoration during the fallow period. The significance of improvements in soil conditions with length of fallow was tested by computing correlation coefficients between age of fallow and soil properties. With regard to the forest fallow soils the results show that there is a progressive build-up of organic matter over the years. The build-up is very rapid initially and by the tenth year of the fallow period the organic matter in the soils has attained 77 % of the equilibrium level. Thereafter, the rate slows down as the equilibrium level is approached. Compared with soil textural composition, organic matter exercises a greater influence on other soil properties and, therefore, on soil fertility regeneration during the fallow period. In the case of the derived savanna fallows the trend of organic matter build-up and of improvements in soil conditions with length of fallow is rather erratic. There is not as strong a correlation between age of fallow and improvements in soil organic matter content and other soil properties as in the forest region. The build-up of organic matter in the savanna fallow soils is rather slow and fortuitous. This is probably due to the smaller vegetation biomass and the annual burning of the bush and the soil litter layer. The slower rate of organic matter build-up in savanna fallow soils can also be explained in terms of the lower equilibrium level. In contrast to the situation in the forest region the influence of soil textural properties appears to be greater than that of the organic matter in soil fertility regeneration. Organic Matter Soil Organic Matter Soil Property Nigeria Soil Organic Matter Content Aweto, A. O. aut Gbadegesin, A. S. aut Enthalten in GeoJournal Kluwer Academic Publishers, 1977 6(1982), 2 vom: März, Seite 183-192 (DE-627)13044555X (DE-600)715360-0 (DE-576)015981851 0343-2521 nnns volume:6 year:1982 number:2 month:03 pages:183-192 https://doi.org/10.1007/BF00185541 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC FID-BIODIV SSG-OLC-GEO SSG-OPC-GGO GBV_ILN_11 GBV_ILN_22 GBV_ILN_24 GBV_ILN_40 GBV_ILN_70 GBV_ILN_72 GBV_ILN_130 GBV_ILN_267 GBV_ILN_2003 GBV_ILN_2006 GBV_ILN_2009 GBV_ILN_2015 GBV_ILN_2018 GBV_ILN_2315 GBV_ILN_4012 GBV_ILN_4029 GBV_ILN_4036 GBV_ILN_4037 GBV_ILN_4046 GBV_ILN_4082 GBV_ILN_4103 GBV_ILN_4126 GBV_ILN_4251 GBV_ILN_4306 GBV_ILN_4311 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4700 AR 6 1982 2 03 183-192 |
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organic matter and soil fertility restoration in forest and savanna fallows in southwestern nigeria |
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Organic matter and soil fertility restoration in forest and savanna fallows in southwestern Nigeria |
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Abstract This paper compares the trend and relative importance in soil fertility restoration, of organic matter build-up in forest and derived savanna fallow soils in parts of SW Nigeria. The analysis of the trend of organic matter build-up in each area was based on the comparison of the mean levels of soil organic matter in fallow soils of different ages as well as the comparison of those mean values with the equilibrium level of organic matter that is attainable in soils under the climax vegetation in each ecological zone. Intercorrelations between all the soil properties were computed in order to assess the relative importance of soil organic matter vis-avis soil intrinsic properties in soil fertility restoration during the fallow period. The significance of improvements in soil conditions with length of fallow was tested by computing correlation coefficients between age of fallow and soil properties. With regard to the forest fallow soils the results show that there is a progressive build-up of organic matter over the years. The build-up is very rapid initially and by the tenth year of the fallow period the organic matter in the soils has attained 77 % of the equilibrium level. Thereafter, the rate slows down as the equilibrium level is approached. Compared with soil textural composition, organic matter exercises a greater influence on other soil properties and, therefore, on soil fertility regeneration during the fallow period. In the case of the derived savanna fallows the trend of organic matter build-up and of improvements in soil conditions with length of fallow is rather erratic. There is not as strong a correlation between age of fallow and improvements in soil organic matter content and other soil properties as in the forest region. The build-up of organic matter in the savanna fallow soils is rather slow and fortuitous. This is probably due to the smaller vegetation biomass and the annual burning of the bush and the soil litter layer. The slower rate of organic matter build-up in savanna fallow soils can also be explained in terms of the lower equilibrium level. In contrast to the situation in the forest region the influence of soil textural properties appears to be greater than that of the organic matter in soil fertility regeneration. © Akademische Verlagsgesellschaft 1982 |
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Abstract This paper compares the trend and relative importance in soil fertility restoration, of organic matter build-up in forest and derived savanna fallow soils in parts of SW Nigeria. The analysis of the trend of organic matter build-up in each area was based on the comparison of the mean levels of soil organic matter in fallow soils of different ages as well as the comparison of those mean values with the equilibrium level of organic matter that is attainable in soils under the climax vegetation in each ecological zone. Intercorrelations between all the soil properties were computed in order to assess the relative importance of soil organic matter vis-avis soil intrinsic properties in soil fertility restoration during the fallow period. The significance of improvements in soil conditions with length of fallow was tested by computing correlation coefficients between age of fallow and soil properties. With regard to the forest fallow soils the results show that there is a progressive build-up of organic matter over the years. The build-up is very rapid initially and by the tenth year of the fallow period the organic matter in the soils has attained 77 % of the equilibrium level. Thereafter, the rate slows down as the equilibrium level is approached. Compared with soil textural composition, organic matter exercises a greater influence on other soil properties and, therefore, on soil fertility regeneration during the fallow period. In the case of the derived savanna fallows the trend of organic matter build-up and of improvements in soil conditions with length of fallow is rather erratic. There is not as strong a correlation between age of fallow and improvements in soil organic matter content and other soil properties as in the forest region. The build-up of organic matter in the savanna fallow soils is rather slow and fortuitous. This is probably due to the smaller vegetation biomass and the annual burning of the bush and the soil litter layer. The slower rate of organic matter build-up in savanna fallow soils can also be explained in terms of the lower equilibrium level. In contrast to the situation in the forest region the influence of soil textural properties appears to be greater than that of the organic matter in soil fertility regeneration. © Akademische Verlagsgesellschaft 1982 |
| abstract_unstemmed |
Abstract This paper compares the trend and relative importance in soil fertility restoration, of organic matter build-up in forest and derived savanna fallow soils in parts of SW Nigeria. The analysis of the trend of organic matter build-up in each area was based on the comparison of the mean levels of soil organic matter in fallow soils of different ages as well as the comparison of those mean values with the equilibrium level of organic matter that is attainable in soils under the climax vegetation in each ecological zone. Intercorrelations between all the soil properties were computed in order to assess the relative importance of soil organic matter vis-avis soil intrinsic properties in soil fertility restoration during the fallow period. The significance of improvements in soil conditions with length of fallow was tested by computing correlation coefficients between age of fallow and soil properties. With regard to the forest fallow soils the results show that there is a progressive build-up of organic matter over the years. The build-up is very rapid initially and by the tenth year of the fallow period the organic matter in the soils has attained 77 % of the equilibrium level. Thereafter, the rate slows down as the equilibrium level is approached. Compared with soil textural composition, organic matter exercises a greater influence on other soil properties and, therefore, on soil fertility regeneration during the fallow period. In the case of the derived savanna fallows the trend of organic matter build-up and of improvements in soil conditions with length of fallow is rather erratic. There is not as strong a correlation between age of fallow and improvements in soil organic matter content and other soil properties as in the forest region. The build-up of organic matter in the savanna fallow soils is rather slow and fortuitous. This is probably due to the smaller vegetation biomass and the annual burning of the bush and the soil litter layer. The slower rate of organic matter build-up in savanna fallow soils can also be explained in terms of the lower equilibrium level. In contrast to the situation in the forest region the influence of soil textural properties appears to be greater than that of the organic matter in soil fertility regeneration. © Akademische Verlagsgesellschaft 1982 |
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