Ann: Cabinda Phosphate Fertilizer Plant Enroute to Angola, page-91

I get the feeling that we will see continuing field trials for years beyond first production to continue to test effectiveness in varying soil types in different regions. Perhaps down the track they might even produce enhanced phosphate rock for some regions with slightly less acidic soil (if there are any in Angola) or for some crops. Im just guessing there. Might not be any benefit in doing that. Benefiiciated phosphate might be suitable enough for most of Angola’s farmland and the lower price might compensate for slightly lower effectiveness on some crops.
In any case, the phosphate product mix won't affect earnings the way the addition of the green ammonia project will.