 About half the CO2 being stored is as organic carbon in the soil and half is in the wood of the branches, trunk and roots.Tagasaste typically yields roughly 1 ton of edible material per 100mm of rain per hectare per year.The potential of tagasaste as a Spanish fodder was identified by Dr Perez, a medical practitioner, based on La Palma island in the Canary Islands in the 1870s, and Spanish cattle farmers.