A study on the quantitative leaching of iron ore in hydrochloric acid solution has been undertaken. The elemental composition of the iron ore was also carried out using ICP-MS technique. The major elements in the iron ore include: Fe(66.7%); Al (0.2%); Si (5.2%); Ti (0.02%) and O (28.0%). Some traces of V, Ni, Zn, Ce, Cr, La, Y and Zr were also found. The effects of contact time, acid concentra...

Field experiments were conducted during 2017 and 2018 rainy seasons at the Kogi State Agricultural Development farm Karara (Lat. 8.230N, Long. 6.560E Alt. 343.00m) in State, Nigeria to investigates influence of different cropping patterns crop nutrient sources on yields Soybean-Maize intercrops. Treatment consisted two crops (Maize Soybean), fertilizer [Organic source (Poultry Manure) Mineral F...