Tag Archives: Physical Properties

Physical Properties and Geometric Characteristics of Promising Ethiopian Chickpea (Cicer arietinum L.) Varieties (Published)

Chickpea (Cicer arietinum L.) is an important grain legume nutritionally balanced for human consumption. The physical properties of chickpea seeds are important for harvesting, handling, drying, storing, de-hulling, processing, and packaging. This study was carried out to determine the effect of different variety and grown environment on the engineering characteristics and physical properties of 11 released and promising chickpea varieties. Eleven Ethiopian promising chickpea varieties were evaluated for physical properties, engineering properties and soaking test. All physical and geometric properties highly significant at (p < 0.05) differences were observed almost in all seed varieties in the three different environment locations, these indicating that there was some requirements variation in the processing equipment design. The average geometric diameter mean, hundred seed weight, length, width, thickness, sphericity, aspect ratio, bulk density, true density, porosity, seed volume, seed surface area and moisture content are 7.22 to 8.43mm, 28.11 to 39.72g, 8.76 to 9.82mm, 6.83 to 7.96mm, 6.75 to 7.66mm, 83.10 to 87.13%, 76.85 to 82.92%, 0.32 to 0.48g/ml, 1.22 to 1.46g/cm3, 25.55 to 36.78%, 161.41 to 261.52, 968.46 to 1326.53 and 10.85 to 12.06%, respectively. The soaking or water absorption of chickpea grain in different time and temperature were showed significant difference among varieties and grown location. Mean diameter showed high positive correlation with that of thickness, seed volume and surface area (r = 0.99).  Totally as soaking time and temperature increased, the per cent of water absorption of chickpea seed varieties were increased in parallel with different magnitude. The results of this research can be used for design and adjustment of agricultural machines of these different chickpea varieties and recognition and classification of them.

Citation: Oli Legesse, Lamesgen Yegrem, Derbie Mengestu, Workneh Abebe and Negussie Girma (2022) Physical Properties and Geometric Characteristics of Promising Ethiopian Chickpea (Cicer arietinum L.) Varieties, Global Journal of Agricultural Research , Vol.10, No.4, pp.39-52

 

Keywords: Geometric Characteristics, Physical Properties, chickpea varieties

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