Particle Size Recommendations for Total Mixed Rationsa
Pore Sizeb (mm) | Particle Sizec (mm) | Percentage by Weight | |
|---|---|---|---|
Upper sieve | 19.1 | >19.1 | 2–8 |
Middle sieve | 7.9 | 7.9–19.1 | 30–50 |
Lower sieve | 4.0 | 4.0–7.9 | 10–20 |
Lower sieve | 1.8 | 1.8–7.9 | 30–50 |
Bottom pan | None | < 4.0 or < 0.18 | 30-40 or ≤20 |
aBased on the use of the Penn State Particle Separator. Data from J. Heinrichs and P. Kononoff, Pennsylvania State University. | |||
bPores are square, so the largest opening is the diagonal. | |||
cParticle size dependent upon lower sieve used; larger proportion weight is associated with 4-mm sieve | |||