Area	Clover yield	Yarrow stems
A	19.0	220
A	76.7	20
A	11.4	510
A	25.1	40
A	32.2	120
A	19.5	300
A	89.9	60
A	38.8	10
A	45.3	70
A	39.7	290
B	16.5	460
B	1.8	320
B	82.4	0
B	54.2	80
B	27.4	0
B	25.8	450
B	69.3	30
B	28.7	250
B	52.6	20
B	34.5	100
C	49.7	0
C	23.3	220
C	38.9	160
C	79.4	0
C	53.2	120
C	30.1	150
C	4.0	450
C	20.7	240
C	29.8	250
C	68.5	0