FIGURE CAPTION
FIGURE 1 (a) Location map of the study area Chhattisgarh, India
(b) satellite view of the reclaimed waste dump of Nalwa Steel and Power
Limited (c) Early-revegetated waste dump surface showing growth of
grass-legume mixture in the slope (after 1 year).
FIGURE 2 Sequence of reclamation of waste dump (a) regrading of
dump slope, (b) blanketing the dump surface with topsoil, (c) slope is
blanketed with coir mat and soil with grass-legumes seeded, and (d) the
growth of grass-legume mixture on the dump slope.
FIGURE 3 Reclaimed dumps after 5-years (a) growth of
grass-legumes at the dump surface, (b) growth of grass-legume at the
dump slope, (c) accumulation of grass-legume mulch at the dump surface,
and (d) accumulation of mulches on the waste dump slope.
FIGURE 4 Variation in mulch thickness, mulch density, soil
moisture, soil temperature and air temperature at the reclaimed wasted
dump with developmental ages of grass-legume revegetation.
FIGURE 5 Net N mineralization (mg kg-1week-1) in topsoil with shoot and root biomass
residues of (a) legume (Stylosanthes hamata), and (b) grass
(Pennisteum pedicellatum ).
FIGURE 6 Correlations between (a) mineralized N (%) and total
nitrogen (TN%) concentration in legume biomass, (b) mineralized N (%)
and total nitrogen (TN%) concentration in grass biomass, (c)
mineralized N (%) and C:N ratio of legume biomass and, (d) mineralized
N (%) and C:N ratio of grass biomass.
FIGURE 7 Effect of grass-legume mulch thickness on reclaimed
soil properties (a) moisture, (b) soil organic matter (SOM), (c)
microbial biomass carbon (MBC), (d) microbial biomass nitrogen (MBN),
and (e) potentially mineralizable nitrogen (PMN) relative to bare soil
(without mulch) with developmental ages of revegetation.
FIGURE 8 Averaged soil CO2 flux measured at
reclaimed waste dump after 1 and 5-years of revegetation with
grass-legume mixture and natural forest (NF).