Agriculture includes dryland and irrigated farming and livestock grazing. The palm groves are irrigated by tidal irrigation. The inhabitants live in permanent villages surrounded by arable fields on irrigated terraces. The green revolution spread only in irrigated and high-potential rainfed areas. Efficient irrigation&colon; Xeriscape can be irrigated efficiently by hand or with an automatic sprinkler system. Farmers plowed and planted seeds in the fields, which were irrigated with ditches and canals. Rainfall is limited in summer and crops have to be irrigated. The province is mostly arid with scant vegetation except for the irrigated Indus Valley. The prehistoric village covered over 26 hectares in an area irrigated by many creeks. However, only of farmland in the basin is irrigated. Large-scale private commercial farms cover 45,000 hectares, accounting for 40% of irrigated land. Vast areas were irrigated and cultivated with the most modern techniques available. About one third of total cultivated land is irrigated. Approximately 5% of Moroccan land is irrigated for agricultural use. In 1800, some 800,000 hectares were irrigated in India.