Agriculture in the prehistoric Southwest
After the Hohokam disappeared, Spanish explorers of the 16th century noted the use of canal irrigation in only two areas of the Southwest: eastern Sonora, primarily practiced by the Opata and Lower Pima, and among the Pueblos of northern New Mexico. Irrigation by the Opata and Pueblos had different objectives. In Sonora, with a long growing season, two crops of maize a year were grown in river valleys. The spring crop during the dry season was dependent upon irrigation; the summer and fall crop during the rainy season utilized irrigation to supplement rainfall. The necessity of irrigation probably required a high level of social organization. In New Mexico, with only one crop of maize per year possible, irrigation was supplemental and the lesser dependence on irrigation implies less social organization than in Sonora.
Hiware Bazar
The villagers implemented a drip-irrigation system to conserve water and soil, and to increase the food production. They avoided crops like sugarcane and bananas, which require a high use of water. The program included rainwater harvesting, digging trenches around the hill contours to trap water, afforestation and building of percolation tanks. These initiatives were complemented by a program for social change, which included a ban on liquor, adoption of family planning, mandating HIV/AIDS testing before marriages and "shramdaan" (voluntary labour for development of the village).