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Needs more examples - just the original, striga/napier grass. the reference at the bottom has hundreds of other combinations of push and pull — Preceding unsigned comment added by 22.214.171.124 (talk) 11:54, 25 November 2011 (UTC)
Jaramogiphil (talk) 16:46, 21 March 2012 (UTC) How should i remove this text."For other uses, see Push–pull (disambiguation)". I have several publications and book chapters, how should i add them here.