Influence of poultry composted manure on soil organic carbon and selected soil properties under Tomato cultivation

Soil quality improvements provide an environment for plant nutrient uptake that impacts the development and yield of the crop. Thus, this study evaluated the effect of applied poultry composted organic manure (PCOM) on selected soil physical attributes and soil organic carbon content (SOC) under two tomatoes (UC82B and BESKE) varieties planted in succession. Three rates 0, 10 and 20 t ha-1 of compost were applied to two tomato varieties. The treatments were arranged in a randomized complete block design (split-plot layout). The soil physical parameters considered are - bulk density, aggregate stability, total porosity and SOC. It was observed that application of PCOM increased SOC, total porosity, aggregate stability and decreased the bulk density in the cropped tomato area. The SOC was highest in 10 t ha-1 of PCOM. Application of 10 t ha-1 compost is adequate to improve carbon content and soil physical properties for a fragile soil

Structural geometry of Ikogosi warm spring, southwestern Nigeria: evidence from aeromagnetic and remote sensing interpretation

In an attempt to understand the general structural patterns of Ikogosi warm spring and environs, remotely sensed images have been integrated with high resolution aeromagnetic anomaly dataset. This is because subsurface faults offer pathways for the upward flow of geothermal fluids and imaging these structures where they are concealed provides localized areas for geothermal investigation. Interpretation of the high resolution aeromagnetic, Landsat-8 and Shuttle Radar Topography Mission data has resulted in the detection of structural features within Ikogosi and environs. The enhancement of aeromagnetic anomaly data using total gradient technique facilitated the identification of three distinct geologic trends. This technique offers good information of structural patterns within the region, including the estimated source depths from the source parameter imaging and 3-D Euler deconvolution methods, which ranges from 100 to 860 m. The results show the distribution and direction of lineaments with major N– S, NE–SW and E–W trends within the study area. The combination of the surface lineaments with magnetic depth maps has established that faults around the warm spring interact, connect and act as conduits for the flow of hydrothermal fluids at varying depths which subsequently channel the fluids to an exit fault/lineament on the surface. The result revealed that the Ikogosi warm spring is situated along a major NNE-trending fault with subsidiary minor E-trending faults. These minor concealed subsidiary faults associated with the Ikogosi warm spring provides a follow-up for geothermal investigation within the region