Management of rice production systems to increase productivity

show any significant differences between Zero application and Low‐Input
rates except for cv WAB56‐50, which had a significant increase in biomass.
Similarly there was no significant difference between the High‐Input and Very
High‐Input rates for all the Low‐Input varieties. At the very high N
application rate all the varieties had a significant increase (p=0.0001) in dry
matter weight, especially cv WAB 35‐125 which responded with massive
biomass production.
Table 7. Low‐Input Upland Rice Trial, Yield Data, Brikama, The Gambia, 2000
Fertilizer Level Variety 1000
Grain
Wt (g)
Zero Application
0‐0‐0
Low‐Input
40‐40‐40
High‐Input
80‐40‐40
Very High Input
160‐80‐80
WAB56‐50
WAB56‐125
WAB377‐B
Peking
WAB56‐50
WAB56‐125
WAB377‐B
Peking
WAB56‐50
WAB56‐125
WAB377‐B
Peking
WAB56‐50
WAB56‐125
WAB377‐B
Peking
27.3
27.2
27.3
23.8
29.9
30.2
30.6
29.3
27.3
28.5
28.1
29.6
34.1
29.4
34.8
31.8
Stover
Wt
T/Ha
1.51
2.10
2.12
1.38
2.88
2.08
1.78
1.86
2.33
2.57
2.08
2.33
3.40
3.64
2.95
2.72
Yield
T/Ha
1.208 BC
1.115 BC
0.879 C
0.907 C
0.782 C
1.296 BC
1.771 BC
1.013 BC
1.650 BC
1.087 BC
2.115 AB
1.597 BC
2.777 A
1.708 BC
1.041 BC
0.731 C
46