Table 1: Soil properties before planting for the 2013 and 2014 cropping season. Organic matter was analyzed using the dry combustion technique (Leco) and extractable elementals were extracted using Mehlich 3 and then analyzed by ICP.
Parameter |
2013 |
2014 |
pH (1:1 water) |
7.14 |
7.4 |
Organic matter (%) |
1.13 |
1.74 |
P (mg kg-1) |
13 |
12 |
K (mg kg-1) |
68 |
66 |
Ca (mg kg-1) |
1179 |
1744 |
Mg (mg kg-1) |
254 |
297 |
S (mg kg-1) |
9.4 |
10.5 |
Na (mg kg-1) |
86 |
62 |
Cu (mg kg-1) |
1.8 |
1.8 |
Zn (mg kg-1) |
7.4 |
5.9 |
Soil particle size distribution (%) |
||
Sand |
4.1 |
3.8 |
Silt |
80.2 |
81.3 |
Clay |
15.7 |
14.9 |
Textural class |
Silt Loam |
Silt Loam |
Bulk density (g cm-3) |
1.39 |
1.44 |
Soil moisture at -20 kPa (% w/w) |
23.7 (± 4.1) |
24.1 (± 3.8) |
Note: Since our rice cultivation system was rice/fallow/rice, the experimental site in 2013 and 2014 were not the same.