Prif wreiddyn: Gwahaniaeth rhwng fersiynau
Cynnwys wedi'i ddileu Cynnwys wedi'i ychwanegu
Stefanik (sgwrs | cyfraniadau) Dim crynodeb golygu |
Stefanik (sgwrs | cyfraniadau) |
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Llinell 25:
* [http://www.hcs.ohio-state.edu/mg/manual/botany.htm Gwybodaeth gan Brifysgol Ohio]
* [http://www.arboretum.fullerton.edu/grow/taproot.asp Tyfu prif wreiddyn, Fullerton Arboretum]
* [https://www.youtube.com/watch?v=EXcw7BCOGaU&list=UUjI5jo9A8z3tmIhyX4Qf0GA&index=2&feature=plcp Make perfect vertically downwards growing primary root system to reforest deserts and rocks, fideo Groasis, Waterboxx (amlieithog)]
* [https://www.youtube.com/watch?v=vJCCXaIz3xc Trafod prif wreiddyn gan [[Pieter Hoff]], 8 munud i fewn]
==Cyfeiriadau==
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