ASTGC - Grams of C added with the addition of organic matter (g m-2).
Valid Range: 0.0 to 9999.0
ASTLBL - Fraction of added C which is labeled, when C is added as a result of the addition of organic matter.
Valid Range: 0.0 to 1.0
ASTLIG - Lignin fraction content of organic matter.
Valid Range: 0.0 to 1.0
ASTREC(1) - C/N ratio of added organic matter.
Valid Range: 1.0 to 500.0
ASTREC(2) - C/P ratio of added organic matter.
Valid Range: 1.0 to 9999.0
ASTREC(3) - C/S ratio of added organic matter.
Valid Range: 1.0 to 9999.0