Influence of Parent Materials on the Soils of Southestern Nigeria

Akamigbo, F. O. R.; Asadu, C. L. A.

doi:10.1080/00128325.1982.11663106

Cited by 43 publications

(41 citation statements)

References 7 publications

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“…However, the significant change in clay content was attributed to crop effect because the field was well protected against erosion during the period of the research. Again, the major factor affecting particlesize distributions in soils of eastern Nigeria is parent material (Akamigbo and Asadu 1983). The mean values of clay obtained showed that those from plots grown to SC and SM were significantly (p 5 0.05) more than that from SP but not significantly different from the others.…”

Section: Resultsmentioning

confidence: 85%

“…The soils of Nsukka in eastern Nigeria have generally been derived from the residua (disintegrated rock materials) of either false-bedded sandstone or upper-coal measures (Asadu 1990), which give rise to sandy and clayey soils respectively (Akamigbo and Asadu 1983). In addition, they are low in inherent fertility and are subjected to high temperature and rainfall of high intensity and erosivity, both of which result in leaching and erosion.…”

Section: Introductionmentioning

confidence: 99%

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Variations in Soil Physical Properties in a Cleared Forestland Continuously Cultivated for Seven Years in Eastern Nsukka, Nigeria

Asadu

Obasi

Dixon

2010

Communications in Soil Science and Plant Analysis

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In this study, soil physical properties were evaluated in the top 40 cm of cleared forestland that had been subjected to continuous cultivation for 7 years to ascertain selected crop or crop combinations that influenced the soil physical properties the most. There was no significant effect of crop treatment on particle-size distributions over 6 years of cultivation. In year 7, clay values were significantly (p 5 0.05) greater in plots grown with solely cassava (SC) and solely maize (SM) than in the plots grown with solely pigeon pea (SP). The soil depth effects over the 7 years were significant on the clay content. The mean values of bulk density, pore-size distribution, and hydraulic conductivity obtained from each plot fluctuated over the years. The bulk density values in 1998 ranged from 1.29 to 1.43 g cm 3 , but from 1999 to 2004, the range was from 1.12 to 1.40 g cm 3 . Thus, bulk density generally decreased when compared with their respective values in 1998. The greatest decrease of < 22% was in 2000. More than 70% of the macroporosity values were significantly less than their respective values in 1998. The greatest decease of 72% was obtained from SM plots in 2001. All the microporosity were significantly more than the 1998 values. All the increases were .100% of the original values. These increases were reflected in the variations of total and saturated hydraulic conductivity (Ks) values. However, in 2004, Ks values decreased in the plots grown to C + P, SP, and SM. Generally, the C + M + P mixture appeared to be the most consistent in improving micro-and total porosities and Ks among the crop treatments.

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Section: Resultsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Variations in Soil Physical Properties in a Cleared Forestland Continuously Cultivated for Seven Years in Eastern Nsukka, Nigeria

Asadu

Obasi

Dixon

2010

Communications in Soil Science and Plant Analysis

Self Cite

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“…Clay fraction could not follow a particular trend but was significantly higher in dry season in CCS and BF only. This change could be attributed to illuviation of clay (Akamigbo, 1983). Bulk density was significantly higher (P<0.05) in rainy season in all the studied landuse, being 1.23-1.37 g/cm 3 CCS; 1.33-1.37 g/cm 3 in FS; 1.29-1.33 g/cm 3 in POS and 1.41-1.39 g/cm 3 in BF The values of bulk density were in line with the ranges documented by Landon (1991) for tropical soils.…”

Section: Resultsmentioning

confidence: 99%

Seasonal Dynamics of Soil Organic Matter and Total Nitrogen in soils under different land uses in Owerri Southeastern Nigeria

Lc¹,

Osuji²,

Onweremadu³

et al. 2013

Agro-Sci.

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ABSTRACT:The study investigated seasonal dynamics of soil organic matter and total nitrogen in soils affected by different land use types in Owerri, Southeastern Nigeria. A total of 72 soil samples were randomly collected at two monthly intervals in the dry season (October/November, December/January and February/March) and rainy season (April/May, June/July and August/September) at 0-20 cm depth in all the studied land uses, namely soils under continuous cassava cultivation (CCS), pineapple orchard soil (POS), bush fallow (FS) and bare fallow (BF.) . Collected soil samples were air dried, passed through 2mm sieve and were analysed using standard methods. The experiment was factorially arranged in randomized complete block design (RCBD), with three factors namely, season, month and landuse. The treatments were replicated three times. Generated soil data were analysed using analysis of variance (ANOVA) and significant means were separated using least significant difference (LSD) at 5% probability. Results showed that soil organic matter and total nitrogen were significantly higher (P<0.05) in the dry season especially between January and April compared to the rainy season where the least was found around June/July in all the studied land uses, although in all cases, their variability was minimal, ranging from 30.

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“…It is on an average elevation of 447 m above sea level. The major soils were derived from the disintegrated rock materials of either false-bedded sandstone or upper-coal measures (Asadu, 1990) and these respectively gave rise to sandy and clayey soils found in the lower and upper slopes (Akamigbo and Asadu, 1983). These soils are exposed to high temperatures and rainfall of high intensity and erosivity which results in erosion and leaching.…”

Section: Study Areamentioning

confidence: 99%

“…The soils of Nsukka area in Eastern Nigeria are generally derived from the residua of false-bedded sand-stone or uppercoal measure formations and these geological formations gave the soils their sandy and clayey characteristics respectively with only low to medium inherent nutrient levels (Akamigbo and Asadu, 1983;Asadu, 1990). Thus, soil fertility maintenance is a major concern and organic matter contributes over 60% of the CEC of the soils in the entire sub-Saharan Africa (Asadu and Akamigbo, 1990;Asadu et al,.…”

Section: Introductionmentioning

confidence: 99%

The effects of continuous cropping and fallowing on the chemical properties of an Ultisol in Nsukka, Nigeria

Asadu¹,

Ekeleman²

2015

Agro-Sci.

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In this study, soil chemical properties were determined in a cleared forestland continuously grown to cassava (Manihot esculenta Crantz), pigeon pea (Cajanus cajan), maize (Zea mays) and their combination for seven years and from then was fallowed for ten years. Soil samples were also collected from the adjacent cleared uncultivated but fallowed plots as well as the original forestland and analyzed. The objective was to compare nutrient recovery capacity as related to land use history under natural fallow. The study showed that the solely cassava plots were able to recover more available P, exchangeable Mg, CEC and had the highest pH value during the fallow period. Plots grown to sole pigeon pea were able to recover more organic matter, exchangeable K, exchangeable Na and exchangeable acidity than other plots. The control plot had the highest total N, while, the M + P plots recovered more exchangeable Ca. Compared to the year the forest was cleared, OM, CEC, exchangeable Ca, Mg, and Na were able to recover to about their original values, while, total N, exchangeable K and available P could not. Thus, soil nutrient recovery through natural fallow is related to previous cropping history but a period of ten years may be enough for some of the nutrients to recover their original levels.

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Influence of Parent Materials on the Soils of Southestern Nigeria

Cited by 43 publications

References 7 publications

Variations in Soil Physical Properties in a Cleared Forestland Continuously Cultivated for Seven Years in Eastern Nsukka, Nigeria

Variations in Soil Physical Properties in a Cleared Forestland Continuously Cultivated for Seven Years in Eastern Nsukka, Nigeria

Seasonal Dynamics of Soil Organic Matter and Total Nitrogen in soils under different land uses in Owerri Southeastern Nigeria

The effects of continuous cropping and fallowing on the chemical properties of an Ultisol in Nsukka, Nigeria

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