Attribute_Name	ORDER	Storage_Type	Measurement_Scale	Number_Type	UNITS	DESCRIPTION	CODES
CO2trt	1	a	nominal	n/a	dimensionless	See reference: plots were covered with open-top-chambers and injected with either elevated (720ppm) or ambient CO2 air, for five years	A=ambient CO2 chambered; H=elevated CO2 chambered; C=unchambered plots
rep	2	a	nominal	n/a	dimensionless	field block	1-3
core	3	a	nominal	n/a	dimensionless	five cores per plot were collected	1-5
depth	4	a	nominal	n/a	centimeter	cores sectioned into 10cm 	0-10, 10-20, 20-30, 30-40, 40-50, 50-60, 60-70, 70-80, 70-80
dry weight	5	f	ratio	real	gram	dry weight of roots	n/a
