The Amount of Zakat is Related to the Type of Irrigation
Issue No. 1605- If a crop is irrigated with rain or a creek, and does not stand in need of well water but it is also irrigated with that, and the well water is not helpful in increasing the production, the zakāt on it is 10%. If it is irrigated with well water and does not stand in need of the water of a creek or rainwater but is also irrigated with it and that water is not helpful in increasing the production, the zakāt on it is 5%.