| 1 | Zinc quilibria and nutrition of rice as influenced by amelioration of sodic soils |
| Researcher: | Upkar Singh |
| Guide: | Takkar, P N |
| University: | Punjab Agricultural University |
| Language: | English |
| 2 | |
| Researcher: | Upkar Singh |
| Guide: | Tamhane, D V |
| University: | University of Mumbai |
| Language: | English |