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. 2014 Dec 17;9(12):e114232. doi: 10.1371/journal.pone.0114232

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© 2014 Ma et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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(A) The seed yield of ZS11 and HYZ9 in 2010–2011. (B) The seed yield of ZS11 and HYZ9 in 2011–2012. The planting densities were designed as D1, 27.0×10⁴ plants ha^-1; D2, 37.5×10⁴ plants ha^-1; D3, 48.0×10⁴ plants ha^-1; D4, 58.5×10⁴ plants ha^-1; D5, 69.0×10⁴ plants ha^-1. Different lower case letters indicate significant pairwise differences between means (p<0.05; Duncan's test).