Haven't read the links, so I may be duplicating. Urea is 46% nitrogen, so high in fact that you can 'burn' the crop if you are not careful.
Best way of improving the soil is to buy a bale (hand carry size not big round or Heston!)of straw dig a hole to sit it in and create a latrine over the top, use that for a period (from aweek to a month or so then leave for a further period before mixing into your compost.
Alternatively pour collected urine over bale, allow to soak for a period them mix into compost heap. You need the straw to absorb and give structure otherwise you risk turning the compost heap into a soggy mess.
no subject
Best way of improving the soil is to buy a bale (hand carry size not big round or Heston!)of straw dig a hole to sit it in and create a latrine over the top, use that for a period (from aweek to a month or so then leave for a further period before mixing into your compost.
Alternatively pour collected urine over bale, allow to soak for a period them mix into compost heap. You need the straw to absorb and give structure otherwise you risk turning the compost heap into a soggy mess.