Problem with results in contribution analysis

Question

When I view my results, only one process contributes to the Climate Change category. I have copied the results from excel below. I don't know why other processes, such as N fertiliser, are coming up null?

Contribution GWP Process Amount Unit

100.00% Basil - RER 0.16851 kg

100.00% Plastic granulate secondary (low metal contamination), production mix, at plant, from post-consumer plastic waste, via grinding, metal separation, washing, pelletization, plastic waste with low metal fraction - EU-28 0.16851 kg

0.00% market for nitrogen fertiliser, as N | nitrogen fertiliser, as N | APOS,U - GLO 0 kg

0.00% market for compost | compost | APOS, U - GLO 0 kg

0.00% market for potassium fertiliser, as K2O | potassium fertiliser, as K2O | APOS, U - GLO 0 kg

0.00% market for pump, 40W | pump, 40W | APOS, U - GLO 0 kg

0.00% ammonium nitrate phosphate production | phosphate fertiliser, as P2O5 | APOS, U - RER 0 kg

0.00% electronic component machinery production, unspecified | electronic component machinery, unspecified | APOS, U - GLO 0 kg

0.00% market for grass seed, Swiss integrated production, at farm | grass seed, Swiss integrated production, at farm | APOS, U - GLO 0 kg

0.00% light emitting diode production | light emitting diode | APOS, U - GLO 0 kg

0.00% market for nitrogen fertiliser, as N | nitrogen fertiliser, as N | APOS, S - GLO 0 kg

0.00% market for paper, newsprint | paper, newsprint | APOS, U - RER 0 kg

0.00% polyethylene production, low density, granulate | polyethylene, low density, granulate | APOS, U - RER 0 kg

Comments

Thanks for your reply. I am using the Ecoinvent 3.6 database and trying to calculate the emissions for basil production. When I calculate the results, the contribution tree only accounts for the system processes such as plastics and the unit processes (that includes fertilisers and steel for infrastructure) come up null.

I changed the allocation methods to "none" as you said but I am still seeing the same problem. I'm now wondering if it has something to do with the "Provider" in the inputs and outputs section of the Process? As I look at the "Provider" section now, each processes has a purple P and white background, as a unit process, but when I calculate the results, plastics and electricity are coming up as system processes.

Thanks for your help so far.