The Role of Biochar in Ameliorating Disturbed Soils and Sequestering Soil Carbon in Tropical Agricultural Production Systems

Table 1

Effects of biochar sourced from different biomass on soil C.

Country	Soil type	Treatment	Application rate	Changes in soil C*	Source	Remark
Philippines	Gleysols	Rice husk biochar	41.3 t ha^−1	12.9 g kg^−1	[54]	After 3 years
Philippines	Nitosols	Rice husk biochar	41.3 t ha^−1	12.4 g kg^−1	[54]	After 3 years
Thailand	Acrisols	Rice husk biochar	41.3 t ha^−1	0.51 g kg^−1	[54]	After 3 years
Ethiopia	Nitosols	Maize stalk biochar	5 t ha^−1	0.71%	[55]	Incubation trial
Ethiopia	Nitosols	Maize stalk	10 t ha^−1	0.77%	[55]	Incubation trial
South Africa	Acidic sandy soils	Pinewood sawmill biochar	10 t ha^−1	8.11%	[56]	Pot trial
India	Vertic ustropept	Prosopis biochar	5% of the incubated soil	4.5 g kg^−1	[57]	After 90 days of incubation
Kenya	Ferrasol	Acacia tree biochar	50 t ha^−1	0.7%	[58]	Greenhouse experiment

∗Changes in soil C refers to the increase in C due to addition of biochar against the control plots.