The land of Babylonian farmers was prepared for irrigation before it was sown by being divided into a number of small square or oblong tracts, each separated from the others by a low bank of earth, the seed being afterwards sown within the small squares or patches. Some of the banks running lengthwise through the field were made into small channels, the ends of which were carried up to the bank of the nearest main irrigation canal. No system of gates or sluices was employed, and when the farmer wished to water one of his fields he simply broke away the bank opposite one of his small channels and let the water flow into it. He would let the water run along this small channel until it reached the part of his land he wished to water. He then blocked the channel with a little earth, at the same time breaking down its bank so that the water flowed over one of the small squares and thoroughly soaked it. When this square was finished he filled up the bank and repeated the process for the next square, and so on until he had watered the necessary portion of the field. When this was finished he returned to the main channel and stopped the flow of the water by blocking up the hole he had made in the dyke. The whole process was, and to-day still is, extremely simple, but it needs care and vigilance, especially in the case of extensive irrigation when water is being carried into several parts of an estate at once. It will be obvious that any carelessness on the part of the irrigator in not shutting off the water in time may lead to extensive damage, not only to his own fields, but to those of his neighbours. In the early Babylonian period, if a farmer left the water running in his channel, and it flooded his neighbour’s field and hurt his crop, he had to pay compensation according to the amount of damage done.