"varnames","vardesc"
"site","site name"
"pit","pit number (digit) - most sites have only one, but some have two"
"depth","depth range for sample (cm)"
"description","description of horizon/layer"
"roots","comment related to vertical extent of roots"
"texture","soil textural class"
"coarse_fragments","coarse fraction as % by mass"
"sample_date","date sample was taken"
"comments","any additional information"