.3A 8B 11.5C 16D 2E 31.5F 44G 62.5H NI.
W 1
DSC(mm) . . . . . . . . . (2)
Where,
DSC = mean of soil clods diameter (mm.)
W = (A+B+C+D+E+F+G+H+I)
A…I = weight of soil retained on each sieve (kg)
N = mean of measured diameter of soil clods retained on the largest aperture
sieve (mm.)
2.1.7 Testing in soil at the second level of moisture content, random test in November,
testing in soil at the third level of moisture content, random test in December, testing in soil
at the fourth level of moisture content, random test in January and testing in soil at the fifth
level of moisture content and a random test in February. Practical tests are done using the
same process as in 2.1.1 – 2.1.6.
2.1.8 Analyze the details about soil clods bigger than 75 mm, the average size of soil clods,
and the draft force when the digging angle of Digging and Preparing and the soil shows
moisture at different levels. The choice of digging angle is based on the least number of soil
clods bigger than 75 mm.