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.
Payment for ecosystem services
In Jesús de Otoro, Honduras, the Cumes River is the town's main source of clean water. Coffee producers were dumping their waste into the river upstream, polluting the source and directly affecting the consumers downstream. To solve this problem, the local Council for Administration of Water and Sewage Disposal (JAPOE) created a payment program to benefit coffee producers upstream and the town's inhabitants who lived downstream. The villagers downstream paid around $0.06 per household per month to JAPOE, who redirected the money toward the upstream farmers. The farmers complied with guidelines, such as construction of irrigation ditches, proper management of waste, and use of organic fertilizers.