Parametera | Aman 2009 | Aman 2010 | Aman 2011 | Boro 2009-10 | Boro 2010-11 | Boro 2011-12 |
Seed rate on seed bed, range (g∙m−2) | 142 - 160 | 140 - 155 | 145 - 157 | 158 - 167 | 160 - 168 | 155-164 |
Seed rate to transplant 1 ha main field (kg) | 55 ± 5 | 45 ± 7 | 50 ± 5 | 58 ± 4 | 49 ± 7 | 46 ± 6 |
Seedling age, range (days) | 35 - 44 | 32 - 40 | 36 - 39 | 49 - 60 | 48 - 55 | 50 - 59 |
Hill spacing at transplanting (cm) | Random | Random | Random | Random | Random | Random |
Seedling number (hill−1) | 5 - 8 | 5 - 9 | 5 - 8 | 5 - 7 | 5 - 8 | 5-8 |
Fertilizer management | ||||||
N applied at basal | ||||||
Farmer (%) | 0 | 0 | 0 | 0 | 0 | 0 |
Amount ± S.D. (kg∙ha−1) | 0 | 0 | 0 | 0 | 0 | 0 |
N applied at early tillering | ||||||
Farmer (%) | 100 | 100 | 100 | 100 | 100 | 100 |
Time ± S.D. (DAT) | 15 ± 2 | 14 ± 2 | 18 ± 3 | 15 ± 4 | 16 ± 3 | 13 ± 4 |
Amount ± S.D. (kg∙ha−1) | 34 ± 9 | 33 ± 7 | 24 ± 6 | 39 ± 6 | 40 ± 4 | 43 ± 3 |
N applied at late tillering | ||||||
Farmer (%) | 100 | 100 | 100 | 100 | 100 | 100 |
Time ± S.D. (DAT) | 25 ± 3 | 30 ± 3 | 28 ± 4 | 30 ± 3 | 32 ± 5 | 37 ± 4 |
Amount ± S.D. (kg∙ha−1) | 37 ± 5 | 45 ± 5 | 39 ± 8 | 42 ± 4 | 36 ± 3 | 40 ± 4 |
N applied at panicle initiation | ||||||
Farmer (%) | 100 | 100 | 100 | 100 | 100 | 100 |
Time ± S.D. (DAT) | 40 ± 4 | 43 ± 2 | 39 ± 3 | 46 ± 3 | 41 ± 5 | 45 ± 4 |
Amount ± S.D. (kg∙ha−1) | 28 ± 6 | 24 ± 3 | 21 ± 3 | 34 ± 7 | 33 ± 4 | 33 ± 4 |
Fraction of total N applied | ||||||
At basal (%) | 0 | 0 | 0 | 0 | 0 | 0 |
At early tillering (%) | 34 | 32 | 29 | 34 | 37 | 37 |
At late tillering (%) | 37 | 44 | 46 | 36 | 33 | 35 |
At panicle initiation (%) | 28 | 24 | 25 | 30 | 30 | 28 |
P applied | ||||||
Farmer (%) | 100 | 100 | 100 | 100 | 100 | 100 |
Amount ± S.D. (kg∙ha−1) | 7 ± 2 | 7 ± 2 | 7 ± 1 | 19 ± 4 | 14 ± 2 | 19 ± 4 |
K applied | ||||||
Farmer (%) | 100 | 100 | 100 | 100 | 100 | 100 |
Amount ± S.D. (kg∙ha−1) | 14 ± 6 | 12 ± 3 | 16 ± 4 | 36 ± 3 | 40 ± 10 | 37 ± 5 |
S applied | ||||||
Farmer (%) | 0 | 0 | 0 | 80 | 100 | 100 |
Amount ± S.D. (kg∙ha−1) | 0 | 0 | 0 | 5 ± 3 | 5 ± 3 | 6 ± 1 |
Zn applied | ||||||
Farmer (%) | 0 | 0 | 0 | 40 | 60 | 40 |
Amount ± S.D. (kg∙ha−1) | 0 | 0 | 0 | 1 ± 1 | 1 ± 1 | 1 ± 1 |