PHYSICAL PROPERTIES OF SOYBEAN (VAR TGX 1019-2EB)

Abstract

Soybean (var TGX 1019-2eb) is one of the improved varieties that were developed by international institute for tropical agricultural (IITA), Ibadan a few years ago. This paper reports the effect of moisture content on the physical properties of the soybean cultivar. The average length, width, thickness and geometric mean diameter of the grain varied from 7.37 to 9.96, 6.48 to 7.45, 5.33 to 5.54 and 6.33 to 7.39cm respectively as the moisture content varied from 6.7to 47.1% (db). One thousand grain mass varied from 130.67 to 180.21g in the same moisture content range. The bulk density, seed density and sphericity decreased from 0.7285 to 0.6034 gmcm1, 1.1570 to 0.952 gmcm1 and 0.860to 0.749% respectively in the moisture content range. Porosity, surface area and volume of the grain increased from 0.2346 to 0.4233%, 1.262 to 1.715cm2 and 0.145 to 0.195cm1 respectively in the same moisture content range of 6.7 to 47.1%. the static coefficient of friction increased on three structural surfaces, namely plywood parallel to grain (0.4877 to 0.6249), plywood perpendicular to grain (0.4922 to 0.6876) and galvanized steel (0.3839 to 0.5774) as the moisture content increased from 6.7 to 47.1%. similarly the of repose increased from 25.87 to 32.45 degrees in the same moisture content range. The above principal findings would be helpful in the design and development of handling, processing and storage equipment of this variety of soybean.