ЦитироватьNative bees and other wild-living insects are estimated to contribute $3 billion annually to American farmers in the form of "free" pollination.
http://www.esa.org/ecoservices/poll/body.poll.fact.html
ЦитироватьSixty eight % of the varieties studied set fruits under free pollination, 15% under self-pollination, and 35% and 15% by cross-pollination with Minneola and Troyer pollinators, respectively.
http://www.scielo.br/scielo.php?pid=S0103-90161999000100023&script=sci_abstract
Цитата: ЕжеВика от ноября 28, 2009, 13:47А это не то?
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