DNDC site mode practice

01/0101/02 (tillage, method (5)), (Manure C = 1,041.46
kgC/ha, N = 80.112 kgN/ha, C/N = 13)
02/01 (tillage; method (2))
07/09 (tillage; method (5)), Manure C = 1,236.76
kgC/ha, N = 95.135 kgN/ha, C/N = 13)
08/13
08/14 (Planting), (tillage; method (2))
08/16
09/07
09/07 (15-15-15, NH 4 NO 3 = 23.44 kgN/ha)
11/04 (46-0-0, 57.5 kgN/ha)
12/10
12/18 (HARVEST)
01/22 (tillage, method (5))
01/29 (tillage, method (2))
07/23(tillage, method (5))
08/19
08/20 (Planting), (tillage; method (2))
08/22
09/03
10/09 (15-15-15, NH 4 NO 3 = 23.44 kgN/ha)
11/12 (46-0-0, 57.5 kgN/ha)
12/16
12/28 (HARVEST) 12/31
Plot name: RF (Fallow-Rice)
Fallow Land
Rice
Fallow Land
Rice
1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2010 2011
F_D F D F_D F D
Fallow
Fallow
* F = Flood
D = Drain
[N] in rainfall = 0.5 ppm
[NH 3 ] atmos. bg. = 0.06 µN/m 3
[CO 2 ] atmos. bg. = 390 ppm
[CO 2 ] annual increase = 2.42 ppm/y

Rice biomass
2 nd crop (Rice) (2010)
Amount of biomass
(kg/ha)
Plot name: RF (Fallow-Rice)
%C in biomass C in biomass
(kgC/ha)
Biomass fraction
Biomass C/N ratio
Grain 2,076.13 43.98 913.08 0.18 31
Straw 6,556.88 39.72 2,604.39 0.50 52
Root 5,671.68 29.40 1,667.47 0.32 30
Rice biomass
4 th crop (Rice) (2011)
Amount of biomass
(kg/ha)
%C in biomass C in biomass
(kgC/ha)
Biomass fraction
Biomass C/N ratio
Grain 3,329.43 43.98 1,464.29 0.32 31
Straw 4,777.25 39.72 1.897.52 0.42 52
Root 4.104.25 29.40 1,206.65 0.26 30
Bulk Density = 175
Clay F = 0.09
pH = 5.8
SOC = 0.004
Depth water retention = 0.3
* 1 st crop & 3 rd crop = fallow land

01/0101/02 (tillage, method (5)), (Manure C = 1,041.46
kgC/ha, N = 80.112 kgN/ha, C/N = 13)
02/05
02/07 (Planting), (tillage; method (2))
02/08
03/11
03/12 (NH 4 NO 3 = 23.44 kgN/ha)
04/07 (Urea =57.5 kgN/ha)
06/10
06/26 (Harvest)
07/09 (tillage; method (5)), Manure C = 1,236.76
kgC/ha, N = 95.135 kgN/ha, C/N = 13)
08/14 (Planting), (tillage; method (2))
08/13
08/16
09/07
09/07 (NH 4 NO 3 = 23.44 kgN/ha) + urea 57.5
kgN/ha
(10/25)
11/04 (urea 57.5 kgN/ha)
12/10
12/18 (HARVEST)
01/27
01/22 (tillage, method (5))
01/30
01/29 (Planting), (tillage; method (2))
02/25
02/20 (NH 4 NO 3 = 23.44 kgN/ha) + urea 57.5 kgN/ha
04/09 (Urea =57.5 kgN/ha)
06/09
05/23 (Urea =57.5 kgN/ha)
06/24 (HARVEST)
07/23(tillage, method (5))
08/19
08/20 (Planting), (tillage; method (2))
08/22
09/03
10/09 (NH 4 NO 3 = 23.44 kgN/ha) + urea
57.5 kgN/ha
11/12 (Urea = 57.5 kgN/ha)
12/16
12/28 (HARVEST) 12/31
Plot name: RR (Rice-Rice)
Irrigated rice
Rainfed rice
Irrigated rice
Rainfed rice
1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2010 2011
F_D F D F_D F D F_D F D F_D F D
* F = Flood
D = Drain
[N] in rainfall = 0.5 ppm
[NH 3 ] atmos. bg. = 0.06 µN/m 3
[CO 2 ] atmos. bg. = 390 ppm
[CO 2 ] annual increase = 2.42 ppm/y

Plot name: RR (Rice-Rice)
Rice
biomass
1 st crop (Irrigated Rice) (2010)
Amount
of
biomass
(kg/ha)
%C in
biomass
C in
biomass
(kgC/ha)
Biomass
fraction
Biomass
C/N ratio
Grain 62.50 43.98 27.49 0.004 31
Straw 15,540.00 39.72 6,172.49 0.873 52
Root 3,056.25 29.40 898.54 0.130 30
Rice
biomass
3 rd crop (Irrigated Rice) (2011)
Amount
of
biomass
(kg/ha)
%C in
biomass
C in
biomass
(kgC/ha)
Biomass
fraction
Biomass
C/N ratio
Grain 2,863.31 43.98 1,259.28 0.27 31
Straw 6,456.50 39.72 2,564.52 0.54 52
Root 3,142.06 29.40 923.77 0.19 30
Rice
biomass
2 nd crop (Rainfed Rice) (2010)
Amount
of
biomass
(kg/ha)
%C in
biomass
C in
biomass
(kgC/ha)
Biomass
fraction
Biomass
C/N ratio
Grain 2,440.00 43.98 1,073.11 0.20 31
Straw 6,275.75 39.72 2,492.73 0.47 52
Root 5,731.13 29.40 1,684.95 0.32 30
Rice
biomass
4 th crop (Rainfed Rice) (2011)
Amount
of
biomass
(kg/ha)
%C in
biomass
C in
biomass
(kgC/ha)
Biomass
fraction
Biomass
C/N ratio
Grain 2,597.75 43.98 1,142.49 0.25 31
Straw 5,460.75 39.72 2,169.01 0.47 52
Root 4,538.88 29.40 1,334.43 0.29 30