"VAR"	"TYPE"	"UNITS"	"DESCRIPTION"	"CODES"
"site"	"c"	"n/a"	"site"	""
"sample"	"c"	"n/a"	"sample analyzed (soil or plant)"	""
"secid"	"c"	"n/a"	"lab use #"	""
"depth"	"c"	"cm"	"soil depth"	""
"plants"	"c"	"n/a"	"type of plant sampled"	""
"ratio"	"f"	"per mil %"	"ratio of N15 to N14"	""
"C"	"f"	"%"	"%C in sample"	""
"N"	"f"	"%"	"%N in sample"	""
