Impacts of Land-use Change on Carbon Stocks and Dynamics in Central-southern South American Biomes: Cerrado, Atlantic Forest and Southern Grasslands - Soil Carbon: Science, Management and Policy for Multiple Benefits - page 250

90 10

9

80

8

70

7

60

6

50

5

40

4

30

3

20

2

10

1

0 0

1978 1983 1988 1993 1998 2003 2008

Productivity Area

Fig. 21.4. Total sugarcane crop area (Mha) and yield (Mg ha -1 ) in Brazil, from 1978 to 2008. (From Brasil/
Ministério da Agricultura Pecuária e Abastecimento (2009), data source: IBGE.)

25

20

15

10

5

0

Forest Pasture 10 years asture 22 years asture 10 to

sugarcane 12 years

System

F-clay -silt F-sand ILF FLF

Fig. 21.5. Distribution of soil carbon stocks in different organic matter pools of soils under different land uses
in the Atlantic Forest biome (FLF, free light fraction; ILF, intra-aggregate light fraction); F-sand, F-silt and
F-clay: organic matter associated to sand, silt and clay particles, respectively. (From Campos et al ., 2004).

significantly higher than burnt sugarcane
(2.01%). This indicates a higher availability
of substrates to microorganisms, and a posi-
tive influence on microbial biomass. Rachid

et al . (2012) have observed the effects of
sugarcane crop management on soil bac-
terial community structure and nitrogen
cycle functional gene diversity (ammonia