unit	description	note
%	percent of dry mass	except for density_spring, density_harvest, lodging, part_grass, part_legumes, part_other
%	percent of ground coverage	for density_spring, density_harvest, lodging, part_grass, part_legumes, part_other
kg/ha	kilograms of dry mass per hectare	
mg/kg	milligram per kilogram dry soil	
g	gram	
g/l	gram per liter
date	calendar date in YYYY-MM-DD