However, at the beginning of the First Intifada, nearly all workers boycotted their jobs in Israel and the following year, when many Palestinians ended their boycott, around half of the workers of Salfit refused to return to their jobs. Consequently, according to historian Glenn E. Robinson, between 1987–1989, a "virtual green revolution" took hold in the town as a result of the enthusiasm generated by the "back-to-the-land movement," agricultural expertise and the increase in additional workers. While prior to the uprising Salfit's residents acquired the bulk of their produce from the Nablus region and Israel, during the revolt the town became self-sufficient in both tomatoes, which were not grown at all previously, and cucumbers. Other agricultural products such as potatoes, eggplants, peppers, cauliflower and beans were grown in greenhouses while those that were not grown were supplied by other Palestinian farmers. Unlike in previous years, Salfit had supplied Nablus with vegetables while that city was under Israeli curfew. Part of this upsurge in agricultural activity was the cultivation of about 100 dunams of relatively isolated lands. In response to Salfit's agricultural initiative, Israel halved the town's water supply in 1989.