Sites Straw removal rate Amount of straw left on soil surface (Mg ha-1) Amount of straw left on soil surface (Mg ha-1) Amount of straw left on soil surface (Mg ha-1) Amount of straw left on soil surface (Mg ha-1)
1st year 2nd year 3rd year 4th year
1*, 2, 3, 6*, 9 TR 0 0 0 0
HR 5 5 5 5
LR 10 10 10 10
NR 15 15 15 15
4 TR 0 0 0 0
HR 4.6 6.3 3.8 3.8
NR 9.2 12.6 7.5 7.5
5* TR 0 0 - -
HR 5.1 4.1 - -
LR 11.4 9.6 - -
NR 15.0 12.4 - -
7* TR 0 0 - -
HR 3.4 3.2 - -
LR 13.0 11.4 - -
NR 16.6 14.7 - -
8 TR 0 0 0 0
HR 8.3 8.6 8.6 6.7
NR 16.5 17.2 17.2 13.4
10 TR 0 0 0 0
HR 7.5 8.0 7.4 5.0
NR 14.9 15.9 14.7 10.0