This study was conducted to determine the nutrient status and forms of potassium in farmed soils at the University of Benin. The soil sample was collected from the Experimental Farm Site and control site at a depth of 0 cm - 15 cm, 15 cm - 30 cm, and 30 cm - 45 cm using a soil auger. Soils collected from each depth were air-dried, crushed, and sieved. The sieved samples were analyzed for some physical and chemical properties using standard laboratory procedures. The data obtained were analyzed by Genstat computer package at a 5 % probability. The result showed that the sand (833.9 g.kg-1) fraction was predominant in the experimental farm site. The pH (4.58) result was recorded in the experimental farm site compared to the control site (4.35). The result showed that (0.13 mg.kg-1) water soluble potassium (H2OK) was recorded in soil depth of 0 cm - 15 cm. The result showed that exchangeabl...

This study investigated the status and forms of calcium in two arable farms, Yam and Cassava farms (Dioscorea rotundata and Manihot esculenta Crantz), under two different land use systems. Soil samples were collected from four depths (0 cm -30 cm, 30 cm -60 cm, 60 cm -90 cm, and 90 cm -120 cm), and for analyzed physical and chemical properties, including calcium fractions: exchangeable, non-exchangeable, and mineral-bound calcium. The results showed that soil pH decreased with depth in both farms, ranging from 5 to 4.07 in Yam Farm and 4.50 to 3.90 in Cassava Farm. The results also showed significant decreases in exchangeable calcium with depth in both farms, ranging from 0.34 mg.kg-1 to 0.06 mg.kg-1 in Yam Farm and 0.42 mg.kg-1 to 0.05 mg.kg-1 in Cassava Farm. The study revealed significant correlations between exchangeable calcium and other soil properties, including electrical conduct...