Monitoring Drought Using Coarse-Resolution Polar-Orbiting Satellite Data - Monitoring and Predicting Agricultural Drought: A Global Study - page 66

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60. 80. 100. 120. 140. 160. 180. 200.

A

Julian date

[66],

Integrated from 3/21 - 6/23/78

57.5 ^

18.16 0.04 X
r 2 0.79

Line
——
* 165
——
Long
* PgEn

52.5

47.5

42.5

37.5

[66],

32.5

480 560 640 720 800 880 960 1040

B Total above ground dry biomass (g/m 2 )

Integrated from 3/21 - 6/23/78

^

14.176 0.111 X
r 2

55.0

0.64

47.5

40.0

32.5

220 250 280 310 340 370 400

C Grain yield (g/m 2 )

Fig ure 5.5 (A) Temporal evolution of NDVI (normalized difference vegetation index) of
wheat during the growing season. (B) The relationship between NDVI and total above-ground
dry matter accumulation. (C) The relationship between wheat yield and NDVI during the
growing season (from Tucker et al., 1980, 1981).