Tulin, A. B. (2008). Application of macro and micronutrients increases purple yam yield. Agriculture.
Lua i Stíl Chicago (17ú heag.)Tulin, Anabella B. "Application of Macro and Micronutrients Increases Purple Yam Yield." Agriculture 2008.
Lua MLA (9ú heag.)Tulin, Anabella B. "Application of Macro and Micronutrients Increases Purple Yam Yield." Agriculture, 2008.
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