Sentence:  In the case of <WSD>wildberries</WSD>, we estimated for each secondary sampling unit the total biomass of edible ripened fruits. 
Meaning of the word marked with <WSD> tags:  Any undomesticated species of berry that is found in the wild, often one that is edible and cultivated on a small scale; a wild berry. Wildberries tend to be smaller than the related domesticated varieties.