In the past I`ve supplemented my allotment compost with farmyard manure, horse muck and green waste from home. However I have become increasingly concerned about importing unwanted pests, diseases and chemical residues. Now I only compost material from my allotment. I grow green manures, (mainly alfalfa, rye, comfrey and phacelia). The methods I use minimise the amount of space required by utilising areas that would otherwise have been bare soil, as much as possible. There is some extra work involved, but this is lessened by cultivating the green manures in rows and composting instead of digging in. The extra work is far, far less than that involved with winter digging and my results are encouraging.
Pete