Agriculture Reference
In-Depth Information
80
Y = 21.45 + 0.2949X
R 2 = 0.16**
60
40
20
10
20
30
40
50
60
Utilization efficiency (mg mg -1 )
80
Y = 27.39 + 0.1251X R 2 = 0.09*
60
40
20
10
20
30
40
50
60
70
80
Apparent recovery efficiency (%)
80
Y = 8.34 + 0.9477X - 0.0080X 2 R 2 = 0.26**
60
40
20
70
10
20
30
40
50
60
80
Agrophysiological efficiency (mg mg -1 )
80
Y = 16.74 + 0.7841X R 2 = 0.60**
60
40
20
10
20
30
Agronomical efficiency (mg mg -1 )
FIGURE 5.3 Relationship between N use efficiencies and grain yield of upland rice. (From Fageria, N. K.,
O. P. Morais, and A. B. Santos. 2010. J. Plant Nutr . 33:1696-1711. With permission.)
TABLE 5.11
Relationship between N Use Efficiency and Grain Yield of Dry Bean
Variable
Regression Equation
R 2
AE (X) versus grain yield (Y)
Y = 4.1500 + 1.7022X - 0.0554X 2
0.578**
PE (X) versus grain yield (Y)
Y = −1.2031 + 0.8366X - 0.0106X 2
0.27**
APE (X) versus grain yield (Y)
Y = 1.7855 + 1.1349X - 0.0228X 2
0.37**
ARE (X) versus grain yield (Y)
Y = 0.8856 + 0.4415X - 0.0032X 2
0.34**
EU (X) versus grain yield (Y)
0.47**
Y = 3.0899 + 1.2579X - 0.0311X 2
Source: From Fageria, N. K., L. C. Melo, and J. P. Oliveira. 2013. J. Plant Nutr . 36:2179-2190. With permission.
Note: AE = agronomic
efficiency,
PE = physiological
efficiency,
APE = agrophysiological
efficiency,
ARE = apparent recovery efficiency, and UE = utilization efficiency. With permission.
**Significant at the 1% probability level.
 
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