Ads: Get Admission into 200 Level and Study any Course in any University of Your Choice. Low Fees | No JAMB UTME. Call 09038456231

Comparative Analysis of the Physical Characteristics of Water Stable Aggregates in Some Forest and Cultivated Soils of Enugu State, South Eastern Nigeria

Filed in Current Projects, Soil Science Project Topics by on September 22, 2020
ADS! Obtain Up to N300,000 Cash in the 2020 Aspire Contest

Comparative Analysis of the Physical Characteristics of Water Stable Aggregates in Some Forest and Cultivated Soils of Enugu State, South Eastern Nigeria.

ABSTRACT  

A study was conducted to evaluate the physical changes that occur in the soil due to conversion of forest to arable land. Six locations in Enugu State that were selected for this purpose include Ugbo-Okpara (Li), Ugbo-nabo (L2), Ugwogo-Nike (L3), IyiUkwu (L4), Edem (L5) and Ugwo (L6). Soil parameters determined include bulk density, saturated hydraulic conductivity, macro porosity, micro porosity, total porosity, organic carbon, pH, Dithionate citrate bi-carbonate (DCB) Iron oxide, particle size distribution, and micro aggregate stability indices.

With respect to the water stable aggregate, the indices used for evaluation include particle size distribution, aggregate size distribution of WSA, mean weight diameter, aggregate stability water retention by WSA at both -33kpa and -1500kpa, available water capacity, organic carbon, aggregated silt plus clay (ASC), water dispersible clay (WDC) and clay dispersion index (CDI). Soils of both land use types were coarse to moderately fine texture, with an average pH of 3.95 and 4.1 in the cultivated and forest land use respectively.

In the soil, cultivation significantly (P ≤ 0.05) increased bulk density by 17 %, reduced hydraulic conductivity, macro porosity, micro porosity and total porosity by 38 %, 23 %, 19 % and 21% respectively. Soil organic carbon and Dithionate citrate bicarbonate iron oxide was reduced by 34 % and 6.7 % respectively. Land use had significant effect on aggregated silt plus clay but no significant effect on water dispersible clay, clay flocculation index and clay dispersion index.

INTRODUCTION  

Aggregate stability expresses the resistance of aggregates to breakdown when subjected to potentially disruptive processes (Hillel, 1998). The structural stability of soil aggregates upon wetting has been the subject of a lot of research around the world (Boucher, 2006). Eynard (2004) indicated that measurement of stability of soil aggregates in water is generally used to estimate structural changes due to cultivation, as water is the main agent of aggregate breakdown in cultivated soils of the humid tropics.

The quality of any soil depends on its degree of aggregation. Soils that are well aggregated, which remain stable when wetted, are important for erosion resistance, water retention and availability and root growth. Mbagwu (2003) reported that factors that influence aggregate stability are important in evaluating the ease with which soils erode, the potentials of soils to crust or seal, soil permeability and quasi-steady state infiltration rates, seedling emergence and in predicting the capacity of soils to sustain long term crop production.

Some researchers observed that soils with low Mean Weight Diameter (MWD) have the potential to erode faster than those with high MWD because detachability is lower with the later (Igwe and Ejiofor 2005). The stability of soil aggregate is affected by soil properties that change relatively little, that is, the inherent composition (texture, type of clay, calcium, sodium, aluminum and iron content) and properties that change in response to vegetation and management (Carter, 2002). 

REFERENCES

Adesodun, J. K., Adeyemi, C. F. and Oyeggoke, C. O. (2006). Distribution of nutrient
element within water stable aggregate of two tropical agro-ecological soils
under different land uses. Soil and Tillage Research. 92: 190-197.

Akamigbo, F. O. R. and Asadu C. L. A. (1983). Influence of parent materials on the
soils of southeastern Nigeria . East Africa Agric. For. .J. 48.81-91.

Amazketa, E. (1999). Soil aggregate stability. A review. J. of Sustains. Agric.
14: 83-151.

Amazketa, F., Singer, M. L. and Bissonaise, Y. (1996). Testing a new procedure for
measuring water stable aggregation. Soil Sc. Soc. Am. J. 60: 884-894.

Andraski, B. J., Mueller, D. H. and Daniel, T.C. (1983). Effect of tillage and rainfall
simulation data on water and soil loss. Soil Sci. Soc. Am. J. 49: 1512-1517.

Angers, P. A. (1998). Water stable aggregates of quebic silty clay soils. Some
factors controlling its dynamics. Soil Tillage Research. 47: 91-96.

Angers, P. A. and Carter, M. R. (1996). Aggregation and organic matter storage in cool
humid agricultural soils. In 193-211 in M.R. Carter and B.A. Stewart (ed).
Structure and organic matter storage in agricultural soils. Lewis publ. CRC
press Boca Raton Fl.

Anger, P. A. Mehus, G. R. (1989). Effect of cropping on carbohydrate content and
water stable aggregation of a clay soil. Can. J. Soil Sc. 69: 373-380.

CSN Team.

Enter your email address:

Delivered by TMLT NIGERIA

Join Over 3,500 000+ Readers Online Now!


=> FOLLOW US ON INSTAGRAM | FACEBOOK & TWITTER FOR LATEST UPDATES

ADS: KNOCK-OFF DIABETES IN JUST 60 DAYS! - ORDER YOURS HERE

COPYRIGHT WARNING! Contents on this website may not be republished, reproduced, redistributed either in whole or in part without due permission or acknowledgement. All contents are protected by DMCA.
The content on this site is posted with good intentions. If you own this content & believe your copyright was violated or infringed, make sure you contact us at [[email protected]] to file a complaint and actions will be taken immediately.

Tags: , , , ,

Comments are closed.