Soil Colour as a Pedo-Transfer Function of Soil Organic Carbon and Fertility in a Typic Plinthaqualf

Article ID

8O14S

Soil Colour as a Pedo-Transfer Function of Soil Organic Carbon and Fertility in a Typic Plinthaqualf

Senjobi
Senjobi
B. A.
B. A.
Adejuyigbe
Adejuyigbe
C. O.
C. O.
Ande
Ande
O. T.
O. T.
Oyegoke
Oyegoke
C.O
C.O
Ogunkunle
Ogunkunle
A. O.
A. O.
DOI

Abstract

The need to guide the land users on the appropriate usage of land and fertility maintenance is very imperative in addressing food sufficiency. Thus, a study was conducted to investigate the erroneous belief by local farmers’ that soil colour can effectively predict soil productivity. Three land use types namely: arable cropping (land use 1), oil palm (land use 2), and secondary forest (land use 3) were studied. Profile pits (3 per land use type) were dug at the three predominant land types encountered on the site viz: crest, middle slope, and valley bottom. Soil colour (moist and dry) was determined using the munsell colour chart. The results revealed that pedons at the crest and middle slope are more reddish to brownish while that of valley bottom are greyish. This changes with depth across the soil profiles. The hue varies with land use type, with land use 1 having higher hue at the valley bottom than other land use types. While this decreases as the slope increases in land use 1, the reverse was the trend in oil palm site. However, in land use 3, the hue was generally low at the valley bottom and not as high as in land use 1. In land use 1, the exchangeable bases increase as the hue 10YR – 25YR decreases in the surface soils except for valley bottom soils, where the reverse is the trend. Organic carbon and exchangeable acidity increases with decrease in hue irrespective of the land type in land use 1. However, phosphorous value decreases as the hue decreases in all the land types, while Zn is constant. At land use 2, the exchangeable bases except for calcium follow the reverse trend as in land use 1. While organic carbon increases in land use 1, the reverse is the trend in the land use 2, with nitrogen following the same sequence as organic carbon. Exchangeable acidity, phosphorous and Zinc only decreases with decreasing soil hue in valley bottom soils, and increases in the other land types. At land use 3, only sodium and potassium increase with decreasing hu

Soil Colour as a Pedo-Transfer Function of Soil Organic Carbon and Fertility in a Typic Plinthaqualf

The need to guide the land users on the appropriate usage of land and fertility maintenance is very imperative in addressing food sufficiency. Thus, a study was conducted to investigate the erroneous belief by local farmers’ that soil colour can effectively predict soil productivity. Three land use types namely: arable cropping (land use 1), oil palm (land use 2), and secondary forest (land use 3) were studied. Profile pits (3 per land use type) were dug at the three predominant land types encountered on the site viz: crest, middle slope, and valley bottom. Soil colour (moist and dry) was determined using the munsell colour chart. The results revealed that pedons at the crest and middle slope are more reddish to brownish while that of valley bottom are greyish. This changes with depth across the soil profiles. The hue varies with land use type, with land use 1 having higher hue at the valley bottom than other land use types. While this decreases as the slope increases in land use 1, the reverse was the trend in oil palm site. However, in land use 3, the hue was generally low at the valley bottom and not as high as in land use 1. In land use 1, the exchangeable bases increase as the hue 10YR – 25YR decreases in the surface soils except for valley bottom soils, where the reverse is the trend. Organic carbon and exchangeable acidity increases with decrease in hue irrespective of the land type in land use 1. However, phosphorous value decreases as the hue decreases in all the land types, while Zn is constant. At land use 2, the exchangeable bases except for calcium follow the reverse trend as in land use 1. While organic carbon increases in land use 1, the reverse is the trend in the land use 2, with nitrogen following the same sequence as organic carbon. Exchangeable acidity, phosphorous and Zinc only decreases with decreasing soil hue in valley bottom soils, and increases in the other land types. At land use 3, only sodium and potassium increase with decreasing hu

Senjobi
Senjobi
B. A.
B. A.
Adejuyigbe
Adejuyigbe
C. O.
C. O.
Ande
Ande
O. T.
O. T.
Oyegoke
Oyegoke
C.O
C.O
Ogunkunle
Ogunkunle
A. O.
A. O.

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Bola Senjobi. 1970. “. Global Journal of Science Frontier Research – H: Environment & Environmental geology GJSFR-H Volume 13 (GJSFR Volume 13 Issue H1): .

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Crossref Journal DOI 10.17406/GJSFR

Print ISSN 0975-5896

e-ISSN 2249-4626

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GJSFR Volume 13 Issue H1
Pg. 31- 40
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Soil Colour as a Pedo-Transfer Function of Soil Organic Carbon and Fertility in a Typic Plinthaqualf

Senjobi
Senjobi
B. A.
B. A.
Adejuyigbe
Adejuyigbe
C. O.
C. O.
Ande
Ande
O. T.
O. T.
Oyegoke
Oyegoke
C.O
C.O
Ogunkunle
Ogunkunle
A. O.
A. O.

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