Contractual relationships most likely were of particularly great significance in ordinary subsistence economy. One of the close similarities that exists between early medieval Irish and Welsh laws is a cooperative farming, particularly co-ploughing, based on contracts agreed between small farmers with too few oxen to set up a full ploughing team. Given that archaeology seems to indicate that the average late prehistoric farm in much of temperate Europe had about 5–10 cattle, of which at the most 2–3 would have been oxen, and that Pliny reports that teams of up to 8 oxen were used on the heavier soils of the Gallia Cisalpina (with possibly even larger teams required for more northerly areas with even heavier soils), it seems highly likely that similar regulations for cooperative farming practices were also common in many late Prehistoric Celtic laws. Reconstructable as Celt. *"komarom", 'joint ploughing', it is one of the areas where early law may have even penetrated to within the internal processes of the individual kin-group, particularly where some members of a ploughing cooperative were not kinsmen, while others were: as formal contracts would have been required between all members of the cooperative, they would also have bound members of the same kin in formal contracts.