Asian Soil Research Journal <p style="text-align: justify;"><strong>Asian Soil Research Journal (ISSN: 2582-3973)</strong> aims to publish high quality papers (<a href="/index.php/ASRJ/general-guideline-for-authors">Click here for Types of paper</a>) in all aspects of soil research. The journal also encourages the submission of useful reports of negative results. This is a quality controlled, OPEN peer reviewed, open access INTERNATIONAL journal.</p> Asian Soil Research Journal en-US Asian Soil Research Journal 2582-3973 Geochemical, Index, and Strength Appraisals of Granite-derived Residual Soils <p>This research work examined the geochemical, index, and strength properties of lateritic residual soils from granitic parent rock in Akure, southwestern Nigeria. The aim is to underscore the potential use of such soils as engineering fills materials. The geochemical method involved the use of X-Ray Fluorescence (XRF). The major oxides determined from this analysis were used for the geochemical quantifications of the soils. Analysis of soil index properties involved consistency limits, grain size distribution and specific gravity tests, while the strength analysis involved compaction and unconfined compressive strength (UCS) tests. Results obtained from the index analysis classified the soil profile into behavioral groups VII and VI. These indicates that the soils are of high to intermediate plasticity and compressibility. The UCS values vary from 272.6 to 377.2 kPa while the shear strength values range from 138.8 to 188.6kPa, indicating good bearing capacity. The geochemical results revealed iron-oxide variations as the major influential constituent within the soil profile. Furthermore, the more lateriterizad zones correspond with the more competent horizons. The residual soils from the study area are found to be suitable materials in engineering construction works as Sanitary landfills and Subgrade materials.</p> C. O. Ikubuwaje O. O. Oso I. A. Rotimi ##submission.copyrightStatement## 2020-07-28 2020-07-28 1 10 10.9734/asrj/2020/v4i130082 Measurement and Estimation of Annual Variability of Water Loss at Njuwa Lake Using Class ‘A’ Pan Evaporation Method <p><strong>Aim: </strong>To measure and estimate the annual variability of water loss at Njuwa Lake using Class ‘A’ Pan Evaporation Method.</p> <p><strong>Place and Duration of Study: </strong>Njuwa Lake in Yola South LGA, Adamawa State Nigeria between November, 2019 and May, 2020.</p> <p><strong>Methodology:</strong> Direct measurements of morphometric characteristics of the lake were adopted using simple bathymetric method. Evaporation rates data and other related weather variable for the periods of ten (2007-2016) years were obtained from Upper Benue River Basin Development Authority located near the lake where the volume of water in the lake and the annual water loss were estimated using FAO estimate of water requirement procedures.</p> <p><strong>Results: </strong>The results revealed that Njuwa Lake has morphometric characteristics of 1, 325 m average length, 180m average width, average depth 3.4 m, 238, 500 m<sup>2 </sup>of&nbsp; surface area, 1,445 m shoreline length and 0.834 m shoreline development with an estimated water volume of&nbsp; 810, 900 m<sup>3</sup> respectively. Similarly, highest Class ‘A’ Pan evaporation rates were found in the year 2011, 2007 and 2008 with the corresponding total annual values of 2688.06 mm, 2403.64 mm and 2389.63 mm having an estimated values of water lost from the lake of 641, 102.310 m<sup>3</sup> (79.07%), 573, 268.140 m<sup>3</sup>(70.7%) and 569, 926.755 m<sup>3</sup> (70.29 %) correspondingly. Conversely, the year 2013,2012 and 2014 were found with the lowest measured Pan evaporation rates (1585.00 mm, 1611.54 mm and 1663.27 mm) with an estimated water lost on the lake of about&nbsp; 378, 022.500 m<sup>3</sup> (46.6 %), 384, 352.290 m<sup>3</sup> (47.4 %) and 396, 689.895 m<sup>3</sup> (48.9 %).</p> <p><strong>Conclusion: </strong>The rate of water loss was through evaporation was estimated to be greater than the stored water in the Lake in most of the years under study which led to untimely drying of the lake thereby affecting the irrigation farming in the area. Valuable strategies of water use efficiency and irrigation scheduling for effective utilization of the limited stored water in the lake for sustainable food production should be therefore adopted. The research work, however, need further work to make a comparison between the class ‘A’ Pan method and other empirical models method to revalidate the reliability.</p> A. A. Sadiq ##submission.copyrightStatement## 2020-08-04 2020-08-04 11 21 10.9734/asrj/2020/v4i130083