颁布单位：[University of the Free State] |  颁布时间：2014 |  实施时间：2014 |  学科分类：[["Planting, date","Planting, depth","Seed, size","Seedling, growth","Sunflower, emergence","Soil, temperature","Sunflowers, --, Planting","Plant, varieties","Oilseed, plants","Dissertation, (M.Sc.Agric., (Soil,, Crop, and, Climate, Sciences))--University, of, the, Free, State,, 2014"]]

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