References
- Clark , R. B. 1983 . Plant genotype difference in the uptake, translocation and use of mineral elements required for plant growth . Plant Soil , 72 : 175 – 196 .
- Zhang , G. , Chen , J. and Tirore , E. A. 1999 . Genotypic variation for potassium uptake and utilization efficiency in wheat . Nutr. Cycl. Agroecosyst. , 54 ( 1 ) : 41 – 48 .
- Makmur , A. , Gerloff , G. C. and Gableman , W. H. 1978 . Physiology and inheritance of potassium utilization in tomatoes grown under potassium stress . J. Am. Soc. Hort. Sci. , 103 : 545 – 549 .
- Nin , A. and Gilsaz , J. C. 1998 . Growth analysis and performance of four sweetpotato cultivars under different levels of nitrogen and potassium . HortScience , 33 ( 3 ) : 443 – 445 .
- Swiader , J. M. , Chyan , Y. and Freiji , F. G. 1994 . Genotypic differences in nitrate uptake and utilization efficiency in pumpkin hybrids . J. Plant Nutr. , 17 ( 10 ) : 1687 – 1699 .
- 1997 . SAS Institute SAS/SRAT Software: Changes and Enhancements Through Release 6.12 Cary, NC : Statistical Analysis System Institute .
- Saurbeck , B. C. and Helal , H. M. 1990 . “ Factors affecting the nutrient efficiency of plants ” . In Genetic Aspects of Plant Mineral Nutrition Edited by: Bassam , N. E.L. 361 – 372 . Tokyo : Martinus Nijhoff .