sqr block trt yield
1     1   1 48.76
1     2   8 10.83
1     3   5 12.54
2     4   5 11.07
2     5   2 22.00
2     6   9 47.43
3     7   2 27.67
3     8   7 30.00
3     9   3 13.78
4    10   6 37.00
4    11   4 42.37
4    12   9 39.00 
1     1   4 14.46
1     2   6 30.69
1     3   9 42.01
2     4   8 22.00
2     5   7 42.80
2     6   6 28.28
3     7   1 50.00
3     8   5 24.00
3     9   8 24.00
4    10   3 15.42
4    11   2 30.00
4    12   7 23.80 
1     1   3 19.68
1     2   7 31.00
1     3   2 23.00
2     4   1 41.00
2     5   3 12.90
2     6   4 49.95
3     7   6 25.00
3     8   4 45.57
3     9   9 30.00
4    10   5 20.00
4    11   8 18.00
4    12   1 43.81 
