AGRO 2051 : Lab Exam 1 Example Calculations - 2015
Document Summary
The below data are for a mechanical analysis by the pipette method in which a 20. 40 g of air-dry soil were dispersed in 500 ml of water and two 25 ml aliquots taken. The air- dry moisture content of the soil was 2 % (0. 02). The total mass of silt + clay was msilt+clay. % silt + clay = [12. 00 g / 20. 00 g] x 100 % = 60 % = 0. 20 g x (500 ml / 25 ml) = 4. 00 g. = 0. 60 g x (500 ml / 25 ml) = 12. 00 g. = [4. 00 g / 20. 00 g] x 100 % = 20 % = 20. 40 / (1 + 0. 02) = 20. 00 g. = 60 % - 20 % = 40 % = 100 % - 60 % = 40 % The below data are for determination of particle density. Mass of picnometer + soil + water (picnometer filled with soil + water)
