The effect of four levels of nitrogen and time of harvest on the yield of sweet potato (Ipomoea batatas (L.) Lam) : a thesis submitted in partial fulfilment of the requirement for the Post Graduate Diploma in Agriculture /
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| Formato: | Libro |
| Lenguaje: | inglés |
| Publicado: |
Lae :
PNG University of Technology, Dept. of Agriculture,
1989.
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