With each fern no wider than an inch, mosquito ferns turned a greenhouse into a frozen tundra for nearly a million years. Now ...
3, No.2, pp. 78-86. Singh, P.K. (1977) Multiplication and utilization of fern Azolla containing nitrogen fixing algal symbiont as a green manure in rice cultivation.Riso 46 642-644. Singh, P. K. (1979 ...
BBC Inside Science A special programme on plants and their pollinators, poisons and pests Azolla – a tiny ancient fern-like pond weed A tiny ancient fern-like pond weed that could have changed ...
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