Table 3.
Variability of crude protein (CP) and amino acids among three origins of barley (%, as-is basis)

Origin	Amino acids (%)
	CP	Lys	Met	Cys	Thr	Met:Lys	Cys:Lys	Thr:Lys
Within country
Australia
n1	34	34	34	34	34	34	34	34
Average	9.82	0.31	0.13	0.20	0.30	0.43	0.65	0.95
CV2	20.02	12.31	21.33	13.62	13.61	19.59	13.58	5.65
India
n1	19	17	17	17	17	17	17	17
Average	9.46	0.23	0.11	0.16	0.25	0.50	0.68	1.10
CV2	4.72	16.55	13.53	12.43	7.91	12.89	9.69	10.09
Ukraine
n1	7	7	7	7	7	7	7	7
Average	10.49	0.30	0.13	0.20	0.30	0.45	0.67	1.02
CV2	4.00	3.30	7.27	7.92	4.03	5.28	6.97	2.64
NRC (2012)
n1	76	38	35	34	37
Average	11.33	0.40	0.20	0.26	0.36	0.50	0.65	0.90
INRA (2003)
n1	2,739	2,739	2,739	2,739	2,739
Average	10.0	0.38	0.17	0.23	0.35	0.49	0.66	1.00
Among countries
n	60	58	58	58	58	58	58	58
Minimum	9.46	0.23	0.11	0.16	0.25	0.43	0.65	0.95
Maximum	10.49	0.31	0.13	0.20	0.30	0.50	0.68	1.10
Average3	9.79	0.29	0.13	0.19	0.29	0.45	0.66	1.01
CV2	5.36	15.21	8.94	13.52	10.07	8.41	2.94	7.45
SEM4	1.523	0.040	0.026	0.026	0.039	0.067	0.071	0.070
P-value	0.308	<0.001	0.040	<0.001	<0.001	0.002	0.186	<0.001

Values represent the number of observations of nutrient contents in barley to the corresponding country of origins or the publications.
CV=coefficient of variation.
Average values are calculated as a weighted average.
SEM=standard error of the mean.