Verwysings
- Combrink , N. J.J. 1971 . Inwendige bruinvlek by aartappels (Solanum tuberosum L.). M.Sc.-tesis, Universiteit van Pretoria
- Cooke , G. W. 1982 . Fertilizing for maximum yield, 3rd edn. Granada Publishing, London, Toronto, Sydney, New York.
- Fong , S. F. and Redshaw , E. S. 1973 . A simple device for the determination of potato tuber specific gravity . Am. Potato J. , 50 : 254 – 256 .
- Garin , N. A. 1977 . [Comparative effect of different forms of potassium fertilizers on yield and marketable quality of potatoes.] . Nauchno-issledovatel skii Institut Khimizatsii Sel 'skolog Khozyaistva , 24 : 75 – 79 . /25
- Harris , P. M. 1978 . The Potato Crop: The scientific basis for improvement. London : Chapman & Hall .
- Hawkins , A. 1965 . New ways of fertilizing potatoes . Am. Potato J. , 42 : 76 – 77 .
- Henderson , R. 1965 . Effects of type of potash and rates of nitrogen, phosphate and potassium in fertilizers on growth, yield and quality of potato crops . J. Sci. Fd. Agric. , 16 : 480 – 488 .
- Ifenkwe , O. P. , Allen , E. J. and Wurr , D. C.E. 1974 . Factors affecting the relationship between tuber size and dry matter content . Am. Potato J. , 51 : 233 – 242 .
- Lourens , F. C. and De Witt , J. 1982 . 'n Vergelyking van kaliumnitraat- en kaliumsulfaatgebasseerde bemestingsprogramme op die opbrengs van aartappels en groenbone . Crop Prod. , 11 : 140 – 143 .
- Lulai , E. C. and Orr , P. H. 1980 . Quality-testing facilities for grower use at the Potato Research laboratory . Am. Potato J. , 57 : 622 – 628 .
- Maree , P. C.J. 1984 . Growing seedless cucumbers in fresh pine sawdust and bark. 355 Proc. International Congress on soilless culture. I.S.O.S.C. Lunteren, Holland
- Mazur , T. and Ciecko , Z. 1979 . [The effect of different forms of potassium and date of application on the yield and quality of potato tuber.] . Zeszty Naukowe Akademii Rolniczo-Technicznej w Olsztynie, Rolnictwo , 26 : 109 – 117 .
- McDOLE , R. E. 1978 . Potassium fertilizer trials with potatoes on coarse-textured soils in southeastern Idaho . Am. Potato J. , 55 : 161 – 170 .
- Murphy , H. J. and Goven , M. J. 1966 . The last decade in 38 years of potash studies for potato fertilizers in Maine . Am. Potato J. , 43 : 122 – 127 .
- Rowberry , R. G. and Ketcheson , J. W. 1978 . Sources of potassium in potato fertilizer and times of application . Can. J. Plant Sci. , 58 : 779 – 782 .