yield variety density obs
10.5 1 1 1
 9.2 1 1 2
 7.9 1 1 3
12.8 1 2 1
11.2 1 2 2
13.3 1 2 3
12.1 1 3 1
12.6 1 3 2
14.0 1 3 3
10.8 1 4 1
 9.1 1 4 2
12.5 1 4 3
 8.1 2 1 1
 8.6 2 1 2
10.1 2 1 3
12.7 2 2 1
13.7 2 2 2
11.5 2 2 3
14.4 2 3 1
15.4 2 3 2
13.7 2 3 3
11.3 2 4 1
12.5 2 4 2
14.5 2 4 3
16.1 3 1 1
15.3 3 1 2
17.5 3 1 3
16.6 3 2 1
19.2 3 2 2
18.5 3 2 3
20.8 3 3 1
18.0 3 3 2
21.0 3 3 3
18.4 3 4 1
18.9 3 4 2
17.2 3 4 3