References
- Barker , A.V. and Maynard , D.N. 1972 . Cation and nitrate accumulation in pea and cucumber plants as influenced by nitrogen nutrition . J. Am. Soc. Hort. Sci. , 97 : 27 – 30 .
- Barker , A.V. and Mills , H.A. 1980 . Ammonium and nitrate nutrition of horticultural crops . Hort. Rev. , 2 : 395 – 423 .
- Cirulli , M. and Ciccarese , F. 1981 . Effects of mineral fertilizers on the incidence of blossom‐end rot of watermelon . Phytopathology , 71 : 50 – 53 .
- Dweikat , I.M. and Kostewicz , S.R. 1989 . Row arrangement, plant spacing, and nitrogen rate effects on zucchini squash yield . HortScience , 24 : 86 – 88 .
- Elamin , O.M. and Wilcox , G.E. 1986 . Nitrogen form ratio influence on muskmelon growth, composition, and manganese toxicity . J. Am. Soc. Hort Sci. , 111 : 320 – 322 .
- Errebhi , M. and Wilcox , G.E. 1990 . Plant species response to ammonium‐nitrate concentration ratios . J. Plant Nutr. , 13 : 1017 – 1029 .
- Flocker , W.J. , Lingle , J.C. , Davis , R.M. and Miller , R.J. 1965 . Influence of irrigation and nitrogen fertilization on yield, quality, size of cantaloupes . Proc. Am. Soc. Hort. Sci. , 86 : 424 – 432 .
- Gamiely , S. , Randle , W.M. , Mills , H.A. and Smittle , D.A. 1991 . Onion plant growth, bulb quality and water uptake following ammonium and nitrate nutrition . HortScience , 26 : 1061 – 1063 .
- Ganmore‐Neumann , R. and Hagiladi , A. 1990 . Effect of NO3‐/NH4+ ratio in nutrient solution on pelargonium stock plants: Yield and quality of cuttings . J. Plant Nutr. , 13 : 1241 – 1256 .
- Hagin , J. , Olsen , S.R. and Shaviv , A. 1990 . Review of interaction of ammonium‐nitrate nutrition of crops . J. Plant Nutr. , 13 : 1211 – 1226 .
- Heuer , B. 1991 . Growth, photosynthesis and protein content in cucumber plants as affected by supplied nitrogen form . J. Plant Nutr. , 14 : 363 – 373 .
- Jones , J.B. Jr. and Case , V.W. 1990 . “ Sampling, handling, and analyzing plant tissue samples. ” . In Soil Testing and Plant Analysis. , 3rd ed. , Edited by: Waterman , R.L. 389 – 427 . Madison, WI : Soil Science Society of America .
- Lorenz , O.A. and Maynard , D.N. 1988 . Knotts Handbook for Vegetable Growers. , 3rd ed. , New York, NY : John & Sons .
- Marti , H.R. and Mills , H.A. 1991 . Nutrient uptake and yield of sweet pepper as affected by stage of development and N form . J. Plant Nutr. , 14 : 1165 – 1175 .
- Mengel , K. and Kirkby , E.A. 1987 . Principles of Plant Nutrition , Bern, , Switzerland : International Potash Institute .
- Reiners , S. and Riggs , D.I.M. 1997 . Plant spacing and variety affect pumpkin yield and fruit size, but supplemental nitrogen does not . HortScience , 32 : 1037 – 1039 .
- Robbins , N.S. and Pharr , D.M. 1987 . Leaf area prediction models for cucumber from linear measurements . HortScience , 22 : 1264 – 1266 .
- SAS . 1985 . SAS User's Guide: Statistics , Cary, NC : Statistical Analysis System Institute, Inc. . Version 5
- Simonne , E.H. , Mills , H.A. and Smittle , D.A. 1992 . Ammonium reduces growth, fruit yield and fruit quality of watermelon . J. Plant Nutr. , 15 : 2727 – 2741 .
- Smittle , D.A. and Threadgill , E.D. 1982 . Response of squash to irrigation, nitrogen fertilization, and tillage systems . J. Am. Soc. Hort. Sci. , 107 : 437 – 440 .
- Sundstrom , F.J. and Carter , S.J. 1983 . Influence of K and Ca on quality and yield of watermelon . J. Am. Soc. Hort. Sci. , 108 : 879 – 881 .
- Swaider , J.M. , Sipp , S.K. and Brown , R.E. 1994 . Pumpkin growth, flowering, and fruiting response to nitrogen and potassium sprinkler fertigation in sandy soil . J. Am. Soc. Hort. Sci. , 119 : 414 – 419 .
- Swaider , J.M. , Sullivan , J.G. , Grunau , J.A. and Freiji , F. 1988 . Nitrate monitoring for pumpkin production on dryland and irrigated soils . J. Am. Soc. Hort. Sci. , 113 : 864 – 869 .
- Zornoza , P. and Carpena , O. 1992 . Study of ammonium tolerance of cucumber plants . J. Plant Nutr. , 15 : 2417 – 2426 .
- Corresponding author.