Very Fine Sand, Total Sand, Total Silt, Total Clay

VFSAND              Very fine sand (% by weight).
TSAND               Total sand (% by weight).
TSILT               Total silt (% by weight).
TCLAY               Total clay (% by weight).

     mineral horizon     0-100; may be -9 if KIND=U or N
     organic horizon     0-100; may be -9 if KIND=U or N
     R,W                 -9
     
     For non missing values TCLAY+TSILT+TSAND=100