Biophysical allocation

Protein required for wool and meat based on the methods of CSIRO (2007) and following the protocols of LEAP (2014a) and Wiedemann et al. (2015) for biophysical allocation from sheep (the base case) as described in Section 10.2.3... 

Figure 10.7 Impact of allocation method for the cradle-to-farm gate phase on GWP relative to biophysical allocation (protein required), shown as 100%. Results are for the products ((a) Socks and (b) Garment) at the point of a distribution centre.

The case study for two merino wool apparel items showed for the first time the relative contributions of each phase in the full life cycle across multiple impact or resource use categories. In this assessment, socks and a long-sleeved T-shirt garment were produced from NZ merino wool, with processing and manufacture involving facilities in China, Mexico, Vietnam and the US for retail in the US or Europe. For the GWP impact using biophysical allocation, production on farm represented one-third to half of the life cycle GHG emissions, while processing was 30—35% of the total. 

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