http://repository.fuoye.edu.ng:80/handle/123456789/114 Journal Articles 2026-04-16T04:20:13Z http://repository.fuoye.edu.ng:80/handle/123456789/1110 Title: Proton induced X-ray emission analysis of soils with various length of fallow: The effect on soil total elemental composition Authors: Inyang, E.P.; Oketayo, O.O.; Obiajunwa, E.I. Abstract: Fallowing of whatever kind is beneficial to elemental (nutrients) recovery. To what length (years) should a land be left fallowed for optimum elemental recovery is of serious concern to stakeholders owing to the limited availability of land. This work aimed at accessing the effect of fallow duration on soil total elemental composition. Proton induced X-ray emission (PIXE) technique has been used to assess the effect of relative longer length of fallowed land on soil total elemental composition using a 5SDH Tandem Pelletron accelerator available at Centre for Energy Research and Development, Obafemi Awolowo University Ile-Ife. The results at a 2.5 MeV energy revealed the presence of elements: Si, P, Ca, Ti, Mn, Fe, Zn, Rb and Zr with the only sharp difference being the fact that elements Zn and Rb were only detected in the soil of continuous cropping probably due to the agrochemical applications prevalent in the study area. The inter-elemental correlation trend revealed a significant positive correlation of P to Ti and Cr (.916 and .937) at P < 0.05 level of significance. A similar trend was obtained for Ca to Mn and Zr (.955 and .925). There was a very strong positive significant inter elemental correlation between Ti and Cr (.994) at P < 0.01 level of significance. On the whole, leaving a land fallow for a relative longer period of time is beneficial in nutrients replenishment. 2015-10-16T00:00:00Z http://repository.fuoye.edu.ng:80/handle/123456789/1073 Title: Assessment of Radiation Emission from Waste Dumpsites in Lagos State of Nigeria Authors: Olubosede, olusayo; Akinnagbe, .O.B .; Adekoya, O Abstract: This paper takes a look at the total radiation emanating from waste dumpsites in two cities of Lagos state Nigeria. This was achieved using a radiation survey meter (RADALERT50) t o measure the radiation exposure rate in micro sievert per hour (μSvhr - 1 ). Readings were taken by placing the detector at gonad level i.e. about 1 meter above the ground level in five sampling locations; this was done at an interval of 5meters away from th e point of reference up to 30 meters. The results obtained revealed that the annual absorbed dose rate measurements taken inside the five dumpsites are 29.80μSvhr - 1 , 28.05μSvhr - 1 , 19.29μSvhr - 1 , 17.53μSvhr - 1 and 15.78μSvhr - 1 . This is far lower than the aver age of 70μSvhr - 1 recommended by UNESCO on effect of Atomic Radiation 2012-05-08T00:00:00Z