ertragsfähigkeit означает в английский

productivity [productivities]▼◼◼◼noun
[UK: ˌprɒ.dʌk.ˈtɪ.vɪ.ti] [US: ˌprodək.ˈtɪ.və.ti]

earning power▼noun

profit-earning (productive yield) capacity▼noun

capacity to enter into a contract▼noun