Farm Carbon Budget - credit

Lostwithiel Farm, Annual carbon budget (t)
Year	2006
Credit
Item	unit	amount	C/unit (t)	total C (t)
Black walnut, field 1	ha	3.02	0.33	1.00
Black walnut, field 2	ha
Black walnut, field 3	ha	1.92	0.39	0.75
Black walnut, F1 blocks	ha
Black walnut, barn field	ha
Hybrid poplar, clone NM6	ha
Hybrid poplar, clone D34	ha
Hybrid polar, clone D182	ha
Native bush	ha
Total				1.75

The credit side of the ledger shows sequestration of 1.75 tonnes in two of our young plantations in 2006, for a negative balance of about 2.23 tonnes. As I noted earlier, we will quantify the other items on the credit side and deliver a truer picture of overall sequestration and benefit. The principal difference between Fields 1 and 3 is plantation density. Trees in Field 1 are at 6m x 12m (20' x 40') spacing and in Field 3 at 6m x 6m (20' x 20'). Field 1 trees are slightly older on average than those in Field 3. We have less data on Field 1, and estimates are based on similar relative expansion of biomass as in Field 3 (these data are slightly different from those posted this morning – mea culpa).