I do not know what is it DEA defect but there is a lot of online books about LCA on internet. Try use Google https://www.google.com/#q=Guidelines+on+Life-Cycle+Assessment

For exampe link to one of detailed guidelines:

http://www.isa.utl.pt/der/ASAmb/DocumentosAulas/Recipe/Handbook%20on%20Life%20Cycle%20Assessment.pdf

if you want to find life cycle of perennial crops like tea, rubber or tree or horticulture you can use Fautsman Formula.

Please contact EM Prof. at [email protected] and Prof. at [email protected]   Also pl. see my research document attached