I.K Ugwa

The study focused on the characteristics and effects of pluvial flooding on soil quality under oil palm plantation in Ovia North East, Edo State in order to avert soil degradation, loss of nutrents and fertility. Soil samples were collected from two sites within the same area which was then labeled as experiment A (Flooded Soils) and experiment B (Non flooded soils/control) and at depths of 0 – 15 , 15 – 30 and 30 – 45 cm respectively. The soil samples collected were analyzed using standard laboratory procedures. The treatments were non-replicated and the data was analyzed using factorial arrangement in randomized complete block (RCB) design. The result showed that sand and clay particle distribution had the highest value in the non-flooded soils than the flooded soils, silt was higher in the flooded soil. It was only Bulk density (BD) that indicated significant difference (P>0.05).water holding capacity (WHC) and Hydraulic conductivity (K-Sat) value was higher in the flooded soils, there was no significant difference (P>0.05). Porosity value was higher in the non-flooded soils, there was significant difference (P>0.05. The pH and Organic carbon (O.C) value of the flooded soils was higher than the non-flooded soils. Total Nitrogen (T.N) was higher in the non-flooded soils; Its LSD was not significant at 0.05 level of probability. Available phosphorus, Calcium (Ca), Magnesium (Mg) and Sodium (Na) were higher in the flooded soil except Potassium; LSD was not significant at 0.05 level of probability. The LSD of exchangeable acidity (E.A), Effective Cation Exchange Capacity (ECEC) and base percentage was not significant at 0.05 level of probability. Fe, Mn and Zn were higher in the flooded soil, but significant difference (P>0.05) except Zn which is not significant at 0.05 level of probability. It was only Cu was high in the non-flooded soil and LSD indicates no significant difference at P>0.05. From the mean values gotten for SEF and SFI, it was discovered that flooded and non-flooded soil are both fertile and are of good quality. It can be concluded that moderate flooding actually helps to improve the quality of the soil.

The study focused on the characterizing, classifying and identify the soil-forming processes in a waterlogged soil in Ovia north East Local Government Area, Edo State for the purpose of providing an understanding of the ecosystem and land-use sustainability. A soil profile of up to 180 cm was dug in the Area, and six soil samples were drawn from the each of the horizons in the profile for laboratory analysis. The morphological properties of these soils: colour, soil structure, soil consistence, drainage, boundaries and root inclusions were recorded in the field. The soil samples collected were analyzed using standard laboratory procedures. The treatments were non- eplicated and the data was analysed using different weathering indices. The results showed that the soil in the study area has a moderate, medium, sub-angular blocky structure in the topsoil, with colours ranging from dark reddish brown to red. The bulk density of the soil was found to be within acceptable limits. The water holding capacity (WHC) was highest in the subsurface horizon and lowest in the surface horizons, with the highest values found at the Bt2 horizon and the lowest at the AB horizon. The pH of the soil was slightly acid to neutral and did not show a clear pattern throughout the profile. available phosphorus was very low and not sufficient for crop production. The levels of micronutrients in the soil, including manganese, copper, zinc, and iron, were higher than necessary for crop plant growth, and crops sensitive to these micronutrients should not be planted. The soil contained high levels of heterogeneous bacteria and fungi, with microbial activity being particularly high at the topsoil. However, microbial activity decreased with soil depth. There is evidence of transformation, translocation of clay, eluviation, illuviation, and leaching. The soils were classified according to the USDA Soil Taxonomy as Typic Kandiudults. These findings provide important information for understanding the suitability of the soil for crop production and identifying potential management strategies. To improve the productivity of the soil in the study area, the study recommends putting in place a well-functioning drainage system and water management facilities, engaging in good organic matter management practices, including the use of farmyard manure, and periodically applying lime to the soil.

The study focused on the characterizing, classifying and identify the soil-forming processes in a waterlogged soil in Ovia North East Local Government Area, Edo State for the purpose of providing an understanding of the ecosystem and land-use sustainability. A soil profile of up to 180 cm was dug in the area, and six soil samples were drawn from the each of the horizons in the profile for laboratory analysis. The morphological properties of these soils: colour, soil structure, soil consistence, drainage, boundaries and root inclusions were recorded in the field. The soil samples collected were analyzed using standard laboratory procedures. The treatments were non-replicated and the data was analysed using different weathering indices. The results showed that the soil in the study area has a moderate, medium, sub-angular blocky structure in the topsoil, with colours ranging from dark reddish brown to red. The bulk density of the soil was found to be within acceptable limits. The water holding capacity (WHC) was highest in the subsurface horizon and lowest in the surface horizons, with the highest values found at the Bt2 horizon and the lowest at the AB horizon. The pH of the soil was slightly acid to neutral and did not show a clear pattern throughout the profile. Available phosphorus was very low and not sufficient for crop production. The levels of micronutrients in the soil, including manganese, copper, zinc, and iron, were higher than necessary for crop plant growth, and crops sensitive to these micronutrients should not be planted. The soil contained high levels of heterogeneous bacteria and fungi, with microbial activity being particularly high at the topsoil. However, microbial activity decreased with soil depth. There is evidence of transformation, translocation of clay, eluviation, illuviation, and leaching. The soils were classified according to the USDA Soil Taxonomy as Typic Kandiudults. These findings provide important information for understanding the suitability of the soil for crop production and identifying potential management strategies. To improve the productivity of the soil in the study area, the study recommends putting in place a well-functioning drainage system and water management facilities, engaging in good organic matter management practices, including the use of farmyard manure, and periodically applying lime to the soil.

The study was designed to investigated the agricultural potentials of a degraded Ultisols in a humid ecological zone of Edo State. The objectives of the study is to investigate the agricultural potentials of the soil. A reconnaissance survey was undertaking to identify the field characteristics, and a representative profile was dug at the University of Benin Agriculture farm. Themorphology, physical and chemical properties of the soil was evaluated. Soil sample was collected from the profile horizons and analyzed using standard procedures. Generally, the soil was well drained, deep, absence of rock. The soil was generally sandy loam in texture. Soil reaction was acidic (5.2 – 5.3), ECEC was low (1.29 – 1.64Cmol kg-1) and base saturation was high (84.96 – 90.00%). Correlation analysis was employed to show the relationship between the physical and chemical parameters of the soil. Six soil properties were positively significant while two were negatively significant. The study provided baseline information forfuture research efforts on soil quality. The study recommended sound agronomic practices especially erosion control measures should be encouraged that further detailed studies could be conducted to examine soil quality in specific time period for sustainable land use