Appendixes

Appendix 4.1 Estimation of crop biomass for the base year (1996) and under 2015 and 2030 crop projections scenario for Latin America and Carribbean region
	Rainfed areas (million tons/yr.)
Description	Medium input use			Low input use
	Base year	2015	2030	Base year	2015	2030
	(total in	Increment	Increment	(total in	Increment	Increment
	M tons)	M tons	M tons	M tons)	M tons	M tons
Crop biomass	3527,65	882,37	1564,10	4130,20	1042,90	1855,60
Carbon stock	141,11	35,29	62,56	165,21	41,72	74,22
	Irrigated Areas (million tons/yr.)
	High input use			Medium input use
Description	Base year	2015	2030	Base year	2015	2030
	(total in	Increment	Increment	(total in	Increment	Increment
	M tons)	M tons	M tons	M tons)	M tons	M tons
Crop biomass	1493,91	1034,32	1720,91	1890,81	1303,95	2170,17
Carbon stock	59,76	41,37	68,84	75,63	52,16	86,81

Appendix 4.2 Technological Options for C Sequestration in Soil (ton/ha/yr).
Technological options	Temperate climate		Tropical and sub-tropical
	Humid	Semi-arid	Humid	Semi-arid
Conservation tillage	0.5-1.0	0.2-0.5	0.2-0.5	0.1-0.2
Mulch farming (4-6Mg/ha/yr)	0.2-0.5	0.1-0.3	0.1-0.3	0.05-0.1
Compost (20 mg/ha/yr)	0.5-1.0	0.2-0.5	0.2-0.5	0.1-0.2
Elimination of bare fallow	0.2-0.4	0.1-0.2	0.1-0.2	0.05-0.1
Integrated nutrient management	0.2-0.4	0.1-0.2	0.2-0.4	0.2-0.4
Restoration of eroded soils	0.5-1.0	0.2-0.5	0.2-0.5	0.1-0.2
Restoration of salt-affected soils	-	0.1-0.2	-	0.05-0.1
Agricultural intensification	0.05-0.10	0.05-0.10	0.2-0.4	0.1-0.20
Water conservation and management	0.05-0.10	0.05-0.10	0.1-0.3	0.01-0.3
Afforestation	0.2-0.5	0.1-0.3	0.2-0.5	0.05-0.1
Secondary carbonates	-	0-0.2	-	0-0.2
Improved pasture management	0.2-0.5	0.1-0.3	0.1-0.2	0.05-0.10
Source (Lal, 1999)

Appendix 4.3 Estimated Values of Additional Carbon Sequestration under Different Land Management Practices in LAC by 2015/30
S.N. Description/assumptions		Estimated total carbon sequestration('000 tons)	Incremental value (Mtons)*
1	Conservation tillage
	Base year (1996) (12% of the area)	5739,444
	2015 (additional 25%)	14249,15	8,51
	2030 (additional 38%)	40571,181	34,83
2	Mulch farming (4-6Mg/ha/yr)
	Base year (1996) (zero)
	2015 (additional 15% of the area)	4380,3	4,38
	2030 (additional 20% of the area)	17044,265	17,04
3	Compost (20 mg/ha/yr)
	Base year (1996) (zero)
	2015 (additional 10%)	5840,4	5,84
	2030 (additional 20%)	19798,26	19,80
4	Elimination of bare fallow
	Base year (1996) (assumed at 5%)	1225,315
	2015 (additional 10% area)	4380,3	3,15
	2030 (additional 15% area)	9899,13	8,67
5	Integrated nutrient management
	Base year (1996)
	2015 (additional 20% area)	9182,82	9,18
	2030 (additional 30% area)	25944,45	25,94
6	Agricultural intensification
	Base year (1996) (existing)
	2015 (additional 25% area)	10774,825	10,77
	2030 (additional 50% area)	24348,95	24,35
7	Water conservation & management
	Base year (1996)
	2015 (assumed increase in efficiency)	6121,88	6,12
	2030 (assumed increase in efficiency)	13837,04	13,84
* Incremental value computed by subtracting the base year (1996) value and are given in million metric tons

Appendix 4.4 Estimation of Addition C-Sequestration Potential from Rehabilitation of Degraded Lands in LAC by 2015 and 2030
	Rehabilitation by 2015		Rehabilitation by 2030
Description	High	Low	High	Low
	estimates	estimates	estimates	estimates
Agro-forestry practices
Area (million ha)	85,5	14,62	106,88	18,28
unit rates (t C/ha)	71.2-117.2	71.2-117.2	71.2-117.2	71.2-117.2
Total C under each
scenario (million tons)
@ high unit rate	10021	1664	12526	2142
@low unit rate	6088	1041	6088	1302
Forest plantations
Area (million ha)	28,5	4,88	35,63	6,1
unit rates (t C/ha)	120	120	120	120
Total C under each	3420	585,6	4275,6	732
scenario (million tons)
Total C-sequestration
(Mt/yr)***
High estimates	327,08	54,97	408,87	69,15
Low estimates	248,42	42,51	281,11	53,15
* Unit rates applied indicate t C/ha over 50 years period ** Unit rate applied indicate tC/ha over 27 years period *** Total C-sequestration amount on per year basis obtained by dividing the number of years in both cases.