Physical properties of neem nut

The physical properties of neem nut were determined in the moisture range of 7.6% to 21% w.b. These include physical dimensions, crushing strength, 1000 nut mass, relative mass of kernel and shell, angle of repose, porosity, bulk density, particle density and coefficient of static friction. The length and stem-end diameter of the nut ranged from 12.87 to 16.20 mm and 6.86 to 8.52mm respectively. The crushing strength of the nut measured both along the longitudinal axis and a diametral axis decreased with increase in moisture content. The mass of 1000 nuts, per cent content of the mass of the kernel in the nut and angle of respose of neem nut increased with increase in moisture content. The porosity, bulk density and particle density decreased Linearly as the moisture content increased. The coefficient of static friction on various surfaces increased with increase in moisture content. The plywood surface offered the maximum friction followed by mild steel, galvanized iron and glass. (C) 1996 Silsoe Research Institute.