Макарова, О. А. Фенологический атлас растений / Н. В. Поликарпова, О. А. Макарова ; М-во природ. ресурсов и экологии Рос. Федерации, Федер. гос. бюджет. учреждение «Гос. природ. заповедник «Пасвик» ; [худож.: Хохлов В. А. ; пер.: Кислова О. С.]. - Рязань : Голос губернии, 2016. – 235 с. : цв. ил., карты, табл.

162 Фенологический атлас растений. A phenological atlas of plants 3 - average yield; minor amounts of mushrooms occur throughout. k - high yield; mushrooms grow in substantial amounts, repeated layers are observed. 5 - abundant yield; high and prolonged mushroom harvest; abundant emergence is observed repeatedly. Visual yield assessment scale fo r berries (after A.N. Formozov): 0 - no berries. 1 - very poor yield; few berries on few plants. 2 - low yield; few berries and small clusters of plants with berries; berries absent in a vast majority of sites. 3 - average yield; berries locally in substantial amounts, but in most sites berries are few or absent. k - high yield; sites with substantial amounts of berries occupy at least 50% of known berry habitats. 5 - very high yield; abundant fruiting throughout, low-yield sites rare or absent.