References
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- Dahlquist , R. L. and Knoll , J. W. 1978 . Inductively coupled plasma‐atomic emission spectrometer: analysis of biological materials and major, trace, and ultra‐trace elements . Applied Spectroscopy , 39 (l) : l – 29 .
- Gallaher , R. N. , Parks , W. L. and Josephson , L. M. 1975 . Some factors influencing yield and cation sum and ratios in corn . Commun. in Soil Sci. and Plant Anal. , 6 : 51 – 61 .
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- Isaac , R. A. and Johnson , W. C. 1976 . Determination of total nitrogen in plant tissue, using a block digestor . J. Assoc. Official Agric. Chemists. , 50 : 98 – 100 .
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- Peck , N. H. and MacDonald , G. E. 1975 . Plant response to concentrated superphosphate and potassium chloride fertilizers VI. Sweet corn (Zea mays L. var. rugosa) . Search Agric. , 5 (3) : l – 35 .
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- SAS Institute Inc. 1982 . SAS User's Guide: Statistics, , 1982 Ed. , 584 Cary, NC : SAS Institute Inc. . 1982
- Smith , C. B. 1977 . Growth responses, nutrient leaf concentrations and interelement relationships of snap beans as affected by fertilizer treatment . J. Amer. Soc. Hort. Sci. , 102 : 61 – 64 .
- Smith , C. B. 1980 . Growth responses and leaf nutrient concentrations of ‘Fordhook 242’ lima beans as affected by fertilizer treatment and plant stand . J. Amer. Soc. Hort. Sci. , 105 : 472 – 475 .
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- Authorized for publication as Paper No. 101 in the Department of Horticulture Series and as Paper No. 7458 in the Journal Series of the Pennsylvania Agricultural Experiment Station.
- Professor of Plant Nutrition and Research Aide, respectively. Department of Horticulture The Pennsylvania State University, University Park, PA 16802.