Tag Archives: Physical Properties

Comparative Study of Some Physico-Chemical Properties and Carbon Storage of Soils under Five Different Multipurpose Trees and Shrubs in the Semi Deciduous Zone of Ghana (Published)

Leaf biomass from Multipurpose Trees and shrubs (MPTs) like Senna siamea, Senna spectabilis, Leucaena leucocephala, Gliricidia sepium and Albizia lebbeck, are known to provide enormous amount of nutrient for crops when used in rotations and/ or fallow to address the decline in soil fertility and yields and store Carbon and biomass and the soil.  A study was conducted on soil of Kumasi-Ofin–Nta compound association of the Agroforestry plot belonging to the Natural Resources Faculty of Kwame Nkrumah University of Science and Technology (KNUST) at Gyinase in the Ashanti Region of Ghana to investigate the effect of five selected fallow species on some selected physical and chemical properties of the soils thirteen years after fallow. The field was a Randomized Complete Block Design made up of five MPTs species in three blocks with replications. The sampling depths were 0 – 10 cm, 10 – 20 cm and 20 – 30 cm. Soil samples were taken through physical and chemical laboratory analysis. Data collected were subjected to analysis of variance (ANOVA). The five MPTs species showed no significant influence on chemical properties of the soil (pH, nitrogen, phosphorus, potassium, Calcium, Magnesium and Carbon). However, there was significant influence of the MPTs on some soil physical properties (bulk density and porosity).

Keywords: Chemical Properties, Multipurpose Tree, Physical Properties, Shrubs, Soil Degradation

Some Physical and Frictional Properties of Dikanut (Irvingia Wombolu) As a Function of Moisture Content. (Published)

Some physical and frictional properties of Dikanut (Irvingia wombolu) were evaluated as a function of moisture content varying from 7.02% to 15.04% (dry basis). Regression models were equally developed to these effects. All properties studied were found to have a polynomial response to moisture content increase within the moisture content range studied (7.02% to 15.04% dry basis). The kernel dimensions increased from 44.00 to 47.73mm, 33.50 to 34.89mm, 20.60 to 21.79mm and 32.20 to 33.73mm for major, intermediate, minor and equivalent diameters respectively as moisture content increased. The kernel volume and surface area increased from 120.01mm3 to 158.56mm3 and 102.04mm2 to 131.64mm2. Bulk density and true density increased from 3.64g/cm3 to 4.33g/cm3, and 10.31g/cm3 to 12.26g/cm3 respectively with increase in the moisture content range tested. Aspect ratio and sphericity and porosity increased from 0.74 to 0.79; 0.70 to 0.72; 0.41 to 0.60 respectively within the moisture content range studied. Angle of repose increased from 20.10 ̊ to 37.20 ̊ while static coefficient of friction increased from 0.60 to 0.92 (plywood), 0.50 to 0.82 (mild steel), 0.37 to 0.70 (aluminum), 0.30 to 0.64 (plastic) as moisture content increased from 7.02 to 15.04% (dry basis) with plywood giving the highest range of values. The relevant data obtained for this variety would be useful for design and development of machines and equipment for processing and handling operations.

Keywords: Dikanut, Moisture Content, Physical Properties, Postharvest, Processing