References
- Bokio , N. L. 1982 . Biochemistry of raphia palmwine . Chem. Abstr. , 15 : 1 – 20 .
- Duru , L. A.D. and Okiy , D. A. 1981 . Composition of the oil and raphia palmwines before and after storage with view to improving the alcohol content 23 – 33 . 18th Annual Report of the Nigerian Institute for Oil Palm Research
- FIIRO . 1984 . Palmwine Preservation; its technology and process know-how . Nig. Technic. Infor. Bul. Ind. , 7 : 10 – 21 .
- Foote , R. H. 2003 . Fertility estimation: a review of past experience and future prospects . Anim. Reprod. Sci. , 75 : 119 – 139 .
- Goswell , R. W. 1986 . “ Microbiology of Fortified Wines ” . In Developments in Food Microbiology , Edited by: Robinson , R. K. 31 – 66 . London : University Press .
- Lai , Y. Y. , Kao , Z. C. , Chang , H. L. and Wu , M. C. 1993 . Comparisons on conception and litter size of Landrace, Yorkshire and Duroc sows inseminated with diluted or frozen semen . Taiwan J. Vet. Med. Anim. Husb. , 61 : 46 – 52 .
- Okafor , N. 1987 . Industrial Microbiology , 207 – 230 . He Ife, , Nigeria : University of Ife Press Ltd. .
- Reuse , J. 1990 . 25 years of pig AI. 5. Effects of stage of oestrus and time of insemination on results . Kleinviehzuchter , 38 : 603 – 607 .
- SAS. 1990 . SAS User's Guide, Statistical Analytical System , North Carolina, , USA : Analytical Institute Inc. .
- Snedecor , G. W. and Cochran , W. G. 1990 . Statistical Method, , 7th ed. , 310 – 409 . The Iowa State University Press .
- Umesiobi , D. O. 2000 . Effect of egg yolk, coconut water and fresh raphia palmwine extenders on the viability of boar sperm during storage at 5°C . J. Agric. Rural Dev. , 1 : 98 – 106 .
- Umesiobi , D. O. , Iloeje , M. U. , Anyanwu , G. A. , Herbert , U. and Okeudo , N. J. 2000 . Relationships between sow fecundity and sexual repertoire of the boar . J. Agric. Rural Dev. , 1 : 114 – 119 .
- Willenburg , K. L. , Miller , G. M. and Rodriguez-Zas , S. L. 2003 . Effect of boar exposure at time of insemination on factors influencing fertility in gilts . J. Anim. Sci. , 81 : 1 – 8 .