BOOKS - POPULAR SCIENCE - Опыление сельскохозяйственных растений пчелами...
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27458
27458
Опыление сельскохозяйственных растений пчелами
Year: 1954
Number of pages: 32
Format: DJVU | PDF
File size: 11 MB
Number of pages: 32
Format: DJVU | PDF
File size: 11 MB
Honey bees and seed production of crops. On the benefits of repeated visits and pollination of flowers by insects. The "floral constancy" of bees and their attachment to the place of bribe. Bee family strength and bee quality as essential conditions for successful pollination. On intra-grade and inter-grade crossbreeds of plants using bees. Conclusion.
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