Sustainable Agriculture I think not!

Paper by Smith et al 2000
Looked effectivness land evaluation techniques using FAO sustainable principled framework - economic feasible, socially acceptable and maintaining ecological processes
Evaluated effectiveness identified its not working due to confusion about the many definitions and inadequate information
since aim remains to maintain productivity with limited regard to ecosystem eg. australian sugar industry.
Propose mew model Threat Identification Model (TIM)
based on the identification of unsustainable processes and the precautionary principle to produce best land management
Main advantages are;
1 can carried out ex ante before land management practices implemented
2 removes the need to define sustainability criteria and indicators
3 it utilises current understanding of the causes and effects of land degradation and how different land-management practices influence these;
(4) it links this knowledge to definite land management options.