1. Ábrahám, E., Hourton-Cabassa, C., Erdei, L., Szabados, L. (2010). Methods for determination of proline in plants. In: Sunkar R. (ed.). Plant stress tolerance: methods and protocols, Springer New York Dordrecht Heidelberg London, pp 317-331. [DOI:10.1007/978-1-60761-702-0_20]

2. American Takii. (1992). Cultural Information on Flowering kale (p. 4).

3. Arena, M.E., Pastur, G.M., Lencinas, M.V., Soler, R., Bustamante, G. (2020). Changes in the leaf nutrient and pigment contents of Berberis microphylla G. Forst. in relation to irradiance and fertilization. Heliyon, 6(1) https://doi.org/10.1016/j.heliyon.2020.e03264 [DOI:10.1016/j.heliyon.2020.e03264..]

4. Armengaud, P., Sulpice, R., Miller, A. J., Stitt, M., Amtmann, A., Gibon, Y. (2009). Multilevel analysis of primary metabolism provides new insights into the role of potassium nutrition for glycolysis and nitrogen assimilation in Arabidopsis roots. Plant Physiol, 150, 772-785. [DOI:10.1104/pp.108.133629]

5. Benincasa, P., Guiducci, M., Tei, F. (2011). The nitrogen use efficiency: meaning and sources of variation - case studies on three vegetable crops in central Italy. HortTechnology, 21(3), 266-273. [DOI:10.21273/HORTTECH.21.3.266]

6. Blank, F. (1947). The anthocyanin pigments of plants. The Botanical Review, 13(5), 241-317. [DOI:10.1007/BF02861798]

7. Boroujerdnia, M., Ansari, N.A. (2007). Effect of Different Levels of Nitrogen Fertilizer and Cultivars on Growth, Yield and Yield Components of Romaine Lettuce (Lactuca sativa L.). Middle Eastern and Russian Journal of Plant Science and Biotechnology, 1(2), 47-53.

8. Cakmak, I., Hengeler, C., Marschner, H. (1994). Partitioning of shoot and root dry matter and carbohydrates in bean plants suffering from phosphorus, potassium and magnesium deficiency, Journal of Experimental Botany, 45, 1245-1250. [DOI:10.1093/jxb/45.9.1245]

9. Cardarelli, M., Rouphael, Y., Muntean, D., Colla, G. (2015). Growth, quality index, and mineral composition of five ornamental cabbage cultivars grown under different nitrogen fertilization rates. HortScience, 50(5), 688-693. [DOI:10.21273/HORTSCI.50.5.688]

10. Chenard, C.H., Kopsell, D.A., Kopsell, D.E. (2005). Nitrogen concentration affects nutrient and carotenoid accumulation in parsley. Journal of Plant Nutrition, 28(2), 285-297. [DOI:10.1081/PLN-200047616]

11. Delgado, R., González, M.R., Martín, P. (2006). Interaction effects of nitrogen and potassium fertilization on anthocyanin composition and chromatic features of Tempranillo grapes. Journal International des Sciences de la Vigne et du Vin, 40(3), 141. [DOI:10.20870/oeno-one.2006.40.3.870]

12. Delgado, R., Martín, P., Del Álamo, M., González, M.R. (2004). Changes in the phenolic composition of grape berries during ripening in relation to vineyard nitrogen and potassium fertilization rates. Journal of the Science of Food and Agriculture, 84(7), 623-630. https://doi.org/10.1002/jsfa.1685 [DOI:10.1002/jsfa.1685.]

13. Everaarts, A.P., & De Moel, C.P. (1998). The effect of nitrogen and the method of application on yield and quality of white cabbage. European Journal of Agronomy, 9(2-3), 203-211. [DOI:10.1016/S1161-0301(98)00038-0]

14. Freyman, S., Toivonen, P.M., Lin, W.C., Perrin, P.W., Hall, J.W. (1991). Effect of nitrogen fertilization on yield, storage losses and chemical composition of winter cabbage. Canadian journal of plant science, 71(3), 943-946. [DOI:10.4141/cjps91-135]

15. Ghasemi Ghehsareh, M., Kafi, M. (2016). General floriculture. Author publication, 215p. (In Persian).

16. Gibson, J.L., Whipker, B.E. (2001). Revising the fertilization strategy for ornamental cabbage. https://gpnmag.com/article/revising-fertilizer-strategy-ornamental-cabbage. Accessed August 2001.

17. Gibson, J.L., Whipker, B.E. (2003). Ornamental cabbage quality improved by continual fertilization through center-head coloration. HortScience, 38(7), 1381-1384. [DOI:10.21273/HORTSCI.38.7.1381]

18. Glass, A.D.M. (2003). Nitrogen use efficiency of crop plants: physiological constraints upon nitrogen absorption. Critical Reviews in Plant Sciences, 22(5), 453-470. [DOI:10.1080/07352680390243512]

19. Gülser, F. (2005). Effects of ammonium sulphate and urea on NO3- and NO2- accumulation, nutrient contents and yield criteria in spinach. Scientia Horticulturae. Scientia Horticulturae, 106(3), 330-340. [DOI:10.1016/j.scienta.2005.05.007]

20. Guttormsen G. (1996). Virkningen av nitrogengjödsling paÊ avling, kvalitet og lagringsevne hos kinakaÊl. Norsk Dindbruksforsking, 10, 74-80.

21. Hirsch, R.E., Sussman, M.R. (1999). Improving nutrient capture from soil by the genetic manipulation of crop plants. Trends in Biotechnology, 17(9), 356-361. [DOI:10.1016/S0167-7799(99)01332-3]

22. Jin, S.W., Rahim, M.A., Kim, H.T., Park, J.I., Kang, J.G., Nou, I.S. (2018). Molecular analysis of anthocyanin-related genes in ornamental cabbage. Genome, 61(2), 111-120. [DOI:10.1139/gen-2017-0098]

23. Keller, M., Hrazdina, G. (1998). Interaction of nitrogen availability during bloom and light intensity during veraison. II. Effects on anthocyanin and phenolic development during grape ripening. American Journal of Enology and Viticulture, 49(3), 341-349. [DOI:10.5344/ajev.1998.49.3.341]

24. Khoshgoftarmanesh, A.H. (2014). Principles of Plant Nutrition (2nd ed.). Isfahan University of Technology. 540p. (In Persian).

25. Kliewer, W.M. (1977). Influence of temperature, solar radiation and nitrogen on coloration and composition of Emperor grapes. American Journal of Enology and Viticulture, 28(2), 96-103. [DOI:10.5344/ajev.1977.28.2.96]

26. Lichtenthaler, H.K., Wellburn, A.R. (1983). Determinations of total carotenoids and chlorophylls a and b of leaf extracts in different solvents. Biochemical Society Transactions. 591-592. [DOI:10.1042/bst0110591]

27. Luczai, R.T. (1992). Flowering cabbage and kale: Ideal for use in late fall landscapes. PPGA News, 23(4), 2-3.

28. MacDonald, W.N., Blom, T.J., Tsujita, M.J., Shelp, B.J. (2013). Improving nitrogen use efficiency of potted chrysanthemum: Strategies and benefits. Canadian Journal of Plant Science, 93(6), 1009-1016. [DOI:10.4141/cjps2013-098]

29. Maness, N. (2010). Extraction and analysis of soluble carbohydrates. In: Sunkar R. (ed.). Plant stress tolerance: methods and protocols, Springer New York Dordrecht Heidelberg London, pp. 341-370. [DOI:10.1007/978-1-60761-702-0_22]

30. Marquardt, B., Schlemmer, R. (1996). Flowering kale: Fall color for late sales. GrowerTalks, 60(3), 68-69.

31. Marschner, H. (2011). Marschner's mineral nutrition of higher plants. Academic press. 651p.

32. McAvoy, R. (1994). Cultural tips for ornamental cabbage and kale. CT Greenhouse Newsletter, 180, 13-15.

33. McDougall, G.J., Fyffe, S., Dobson, P., Stewart, D. (2007). Anthocyanins from red cabbage-stability to simulated gastrointestinal digestion. Phytochemistry, 68(9), 1285-1294. [DOI:10.1016/j.phytochem.2007.02.004]

34. Mohammed, S., Singh, D., Ahlawat, V.P. (1993). Growth, yield and quality of grapes as affected by pruning and basal application of potassium. Haryana Journal of Horticultural Sciences, 22, 179-183.

35. Nitsos, R.E. and Evans, H.J. (1969). Effects of univalent cations on the activity of particulate starch synthetase. Plant Physiol. 44, 1260-1266. [DOI:10.1104/pp.44.9.1260]

36. Piccaglia, R., Marotti, M., Baldoni, G. (2002). Factors influencing anthocyanin content in red cabbage (Brassica oleracea var. capitata L. f rubra (L) Thell). Journal of the Science of Food and Agriculture, 82(13), 1504-1509. [DOI:10.1002/jsfa.1226]

37. Pirie, A., Mullins, M.G. (1977). Interrelationships of sugars, anthocyanins, total phenols and dry weight in the skin of grape berries during ripening. American Journal of Enology and viticulture, 28(4), 204-209. [DOI:10.5344/ajev.1977.28.4.204]

38. Reay, P.F., Fletcher, R.H. and Thomas, V.J.G. (1998). Chlorophylls, carotenoids and anthocyanin concentrations in the skin of 'Gala' apples during maturation and the influence of foliar applications of nitrogen and magnesium. Journal of the Science of Food and Agriculture, 76(1), 63-71. https://doi.org/10.1002/(SICI)1097-0010(199801)76:1<63::AID-JSFA908>3.0.CO;2-K [DOI:10.1002/(SICI)1097-0010(199801)76:13.0.CO;2-K]

39. Shaikh, N.P., Adjei, M.B., Scholberg, J.M. (2008). Interactive effect of phosphorus and nitrogen on leaf anthocyanins, tissue nutrient concentrations, and dry-matter yield of Floralta limpograss during short day length. Communications in Soil Science and Plant Analysis, 39(7-8), 1006-1015. [DOI:10.1080/00103620801925414]

40. Sorgona, A., Abenavoli, M.R., Gringeri, P.G., Cacco, G. (2006). A comparison of nitrogen use efficiency definitions in Citrus rootstocks. Scientia Horticulturae, 109(4), 389-393. [DOI:10.1016/j.scienta.2006.06.001]

41. Spayd, S.E., Wample, R.L., Evans, R.G., Stevens, R.G., Seymour, B.J., Nagel, C.W. (1994). Nitrogen fertilization of White Riesling grapes in Washington. Must and wine composition. American Journal of Enology and Viticulture, 45(1), 34-42. [DOI:10.5344/ajev.1994.45.1.34]

42. Takki Seed, A. (2017). Flowering Kale F1. http://www.takii.com/wp-content/uploads/2016/05/Flowering-Kale-F1-Feather-and-Fringe-Leaf-Rev-B-.pdf

43. Tjhia, B., Aziz, S.A., Suketi, K. (2018). Correlations between leaf nitrogen, phosphorus and potassium and leaf chlorophyll, anthocyanins and carotenoids content at vegetative and generative stage of Bitter Leaf (Vernonia amygealina Del.). Journal of Tropical Crop Science, 5(1), 23-53. [DOI:10.29244/jtcs.5.1.25-33]

44. Turan, M., Sevimli, F. (2005). Influence of different nitrogen sources and levels on ion content of cabbage (Brassica oleracea var. capitate). New Zealand Journal of Crop and Horticultural Science, 33(3), 241-249. [DOI:10.1080/01140671.2005.9514356]

45. Whipker, B.E., Gibson, J.L., Cloyd, R.A., Campbell, C.R., Jones, R. (1998). Success with ornamental cabbage and kale. Horticulture Information Leaflet, 507, 1-9.

46. Wilson, C., Albano, J., Mozdzen, M., Riiska, C. (2010). Irrigation water and nitrate-nitrogen loss characterization in southern Florida nurseries: Cumulative volumes, runoff rates, nitrate-nitrogen concentrations and loadings, and implications for management. HortTechnology, 20(2), 325-330. [DOI:10.21273/HORTTECH.20.2.325]

47. Wu, L., Li, P., Jia, H., Phillip, F.O., Bao, X., Zhao, F., Yu, K. (2021). The effect of foliar application of K2SO4 or KH2PO4 on skin color of the 'Kyoho' Grape. Agronomy, 11(11), 2361. [DOI:10.3390/agronomy11112361]

48. Zhao, D., Oosterhuis, D.M., Bednarz, C. W. (2001). Influence of potassium deficiency on photosynthesis, chlorophyll content, and chloroplast ultrastructure of cotton plants. Photosynthetica, 39(1), 103-109. [DOI:10.1023/A:1012404204910]

49. Zhao, D., Reddy, K.R., Kakani, V.G., Read, J.J., Carter, G.A. (2003). Corn (Zea mays L.) growth, leaf pigment concentration, photosynthesis and leaf hyperspectral reflectance properties as affected by nitrogen supply. Plant and Soil, 257(1), 205-218. [DOI:10.1023/A:1026233732507]

50. Ábrahám, E., Hourton-Cabassa, C., Erdei, L., Szabados, L. (2010). Methods for determination of proline in plants. In: Sunkar R. (ed.). Plant stress tolerance: methods and protocols, Springer New York Dordrecht Heidelberg London, pp 317-331. [DOI:10.1007/978-1-60761-702-0_20]

51. American Takii. (1992). Cultural Information on Flowering kale (p. 4).

52. Arena, M.E., Pastur, G.M., Lencinas, M.V., Soler, R., Bustamante, G. (2020). Changes in the leaf nutrient and pigment contents of Berberis microphylla G. Forst. in relation to irradiance and fertilization. Heliyon, 6(1) https://doi.org/10.1016/j.heliyon.2020.e03264 [DOI:10.1016/j.heliyon.2020.e03264..]

53. Armengaud, P., Sulpice, R., Miller, A. J., Stitt, M., Amtmann, A., Gibon, Y. (2009). Multilevel analysis of primary metabolism provides new insights into the role of potassium nutrition for glycolysis and nitrogen assimilation in Arabidopsis roots. Plant Physiol, 150, 772-785. [DOI:10.1104/pp.108.133629]

54. Benincasa, P., Guiducci, M., Tei, F. (2011). The nitrogen use efficiency: meaning and sources of variation - case studies on three vegetable crops in central Italy. HortTechnology, 21(3), 266-273. [DOI:10.21273/HORTTECH.21.3.266]

55. Blank, F. (1947). The anthocyanin pigments of plants. The Botanical Review, 13(5), 241-317. [DOI:10.1007/BF02861798]

56. Boroujerdnia, M., Ansari, N.A. (2007). Effect of Different Levels of Nitrogen Fertilizer and Cultivars on Growth, Yield and Yield Components of Romaine Lettuce (Lactuca sativa L.). Middle Eastern and Russian Journal of Plant Science and Biotechnology, 1(2), 47-53.

57. Cakmak, I., Hengeler, C., Marschner, H. (1994). Partitioning of shoot and root dry matter and carbohydrates in bean plants suffering from phosphorus, potassium and magnesium deficiency, Journal of Experimental Botany, 45, 1245-1250. [DOI:10.1093/jxb/45.9.1245]

58. Cardarelli, M., Rouphael, Y., Muntean, D., Colla, G. (2015). Growth, quality index, and mineral composition of five ornamental cabbage cultivars grown under different nitrogen fertilization rates. HortScience, 50(5), 688-693. [DOI:10.21273/HORTSCI.50.5.688]

59. Chenard, C.H., Kopsell, D.A., Kopsell, D.E. (2005). Nitrogen concentration affects nutrient and carotenoid accumulation in parsley. Journal of Plant Nutrition, 28(2), 285-297. [DOI:10.1081/PLN-200047616]

60. Delgado, R., González, M.R., Martín, P. (2006). Interaction effects of nitrogen and potassium fertilization on anthocyanin composition and chromatic features of Tempranillo grapes. Journal International des Sciences de la Vigne et du Vin, 40(3), 141. [DOI:10.20870/oeno-one.2006.40.3.870]

61. Delgado, R., Martín, P., Del Álamo, M., González, M.R. (2004). Changes in the phenolic composition of grape berries during ripening in relation to vineyard nitrogen and potassium fertilization rates. Journal of the Science of Food and Agriculture, 84(7), 623-630. https://doi.org/10.1002/jsfa.1685 [DOI:10.1002/jsfa.1685.]

62. Everaarts, A.P., & De Moel, C.P. (1998). The effect of nitrogen and the method of application on yield and quality of white cabbage. European Journal of Agronomy, 9(2-3), 203-211. [DOI:10.1016/S1161-0301(98)00038-0]

63. Freyman, S., Toivonen, P.M., Lin, W.C., Perrin, P.W., Hall, J.W. (1991). Effect of nitrogen fertilization on yield, storage losses and chemical composition of winter cabbage. Canadian journal of plant science, 71(3), 943-946. [DOI:10.4141/cjps91-135]

64. Ghasemi Ghehsareh, M., Kafi, M. (2016). General floriculture. Author publication, 215p. (In Persian).

65. Gibson, J.L., Whipker, B.E. (2001). Revising the fertilization strategy for ornamental cabbage. https://gpnmag.com/article/revising-fertilizer-strategy-ornamental-cabbage. Accessed August 2001.

66. Gibson, J.L., Whipker, B.E. (2003). Ornamental cabbage quality improved by continual fertilization through center-head coloration. HortScience, 38(7), 1381-1384. [DOI:10.21273/HORTSCI.38.7.1381]

67. Glass, A.D.M. (2003). Nitrogen use efficiency of crop plants: physiological constraints upon nitrogen absorption. Critical Reviews in Plant Sciences, 22(5), 453-470. [DOI:10.1080/07352680390243512]

68. Gülser, F. (2005). Effects of ammonium sulphate and urea on NO3- and NO2- accumulation, nutrient contents and yield criteria in spinach. Scientia Horticulturae. Scientia Horticulturae, 106(3), 330-340. [DOI:10.1016/j.scienta.2005.05.007]

69. Guttormsen G. (1996). Virkningen av nitrogengjödsling paÊ avling, kvalitet og lagringsevne hos kinakaÊl. Norsk Dindbruksforsking, 10, 74-80.

70. Hirsch, R.E., Sussman, M.R. (1999). Improving nutrient capture from soil by the genetic manipulation of crop plants. Trends in Biotechnology, 17(9), 356-361. [DOI:10.1016/S0167-7799(99)01332-3]

71. Jin, S.W., Rahim, M.A., Kim, H.T., Park, J.I., Kang, J.G., Nou, I.S. (2018). Molecular analysis of anthocyanin-related genes in ornamental cabbage. Genome, 61(2), 111-120. [DOI:10.1139/gen-2017-0098]

72. Keller, M., Hrazdina, G. (1998). Interaction of nitrogen availability during bloom and light intensity during veraison. II. Effects on anthocyanin and phenolic development during grape ripening. American Journal of Enology and Viticulture, 49(3), 341-349. [DOI:10.5344/ajev.1998.49.3.341]

73. Khoshgoftarmanesh, A.H. (2014). Principles of Plant Nutrition (2nd ed.). Isfahan University of Technology. 540p. (In Persian).

74. Kliewer, W.M. (1977). Influence of temperature, solar radiation and nitrogen on coloration and composition of Emperor grapes. American Journal of Enology and Viticulture, 28(2), 96-103. [DOI:10.5344/ajev.1977.28.2.96]

75. Lichtenthaler, H.K., Wellburn, A.R. (1983). Determinations of total carotenoids and chlorophylls a and b of leaf extracts in different solvents. Biochemical Society Transactions. 591-592. [DOI:10.1042/bst0110591]

76. Luczai, R.T. (1992). Flowering cabbage and kale: Ideal for use in late fall landscapes. PPGA News, 23(4), 2-3.

77. MacDonald, W.N., Blom, T.J., Tsujita, M.J., Shelp, B.J. (2013). Improving nitrogen use efficiency of potted chrysanthemum: Strategies and benefits. Canadian Journal of Plant Science, 93(6), 1009-1016. [DOI:10.4141/cjps2013-098]

78. Maness, N. (2010). Extraction and analysis of soluble carbohydrates. In: Sunkar R. (ed.). Plant stress tolerance: methods and protocols, Springer New York Dordrecht Heidelberg London, pp. 341-370. [DOI:10.1007/978-1-60761-702-0_22]

79. Marquardt, B., Schlemmer, R. (1996). Flowering kale: Fall color for late sales. GrowerTalks, 60(3), 68-69.

80. Marschner, H. (2011). Marschner's mineral nutrition of higher plants. Academic press. 651p.

81. McAvoy, R. (1994). Cultural tips for ornamental cabbage and kale. CT Greenhouse Newsletter, 180, 13-15.

82. McDougall, G.J., Fyffe, S., Dobson, P., Stewart, D. (2007). Anthocyanins from red cabbage-stability to simulated gastrointestinal digestion. Phytochemistry, 68(9), 1285-1294. [DOI:10.1016/j.phytochem.2007.02.004]

83. Mohammed, S., Singh, D., Ahlawat, V.P. (1993). Growth, yield and quality of grapes as affected by pruning and basal application of potassium. Haryana Journal of Horticultural Sciences, 22, 179-183.

84. Nitsos, R.E. and Evans, H.J. (1969). Effects of univalent cations on the activity of particulate starch synthetase. Plant Physiol. 44, 1260-1266. [DOI:10.1104/pp.44.9.1260]

85. Piccaglia, R., Marotti, M., Baldoni, G. (2002). Factors influencing anthocyanin content in red cabbage (Brassica oleracea var. capitata L. f rubra (L) Thell). Journal of the Science of Food and Agriculture, 82(13), 1504-1509. [DOI:10.1002/jsfa.1226]

86. Pirie, A., Mullins, M.G. (1977). Interrelationships of sugars, anthocyanins, total phenols and dry weight in the skin of grape berries during ripening. American Journal of Enology and viticulture, 28(4), 204-209. [DOI:10.5344/ajev.1977.28.4.204]

87. Reay, P.F., Fletcher, R.H. and Thomas, V.J.G. (1998). Chlorophylls, carotenoids and anthocyanin concentrations in the skin of 'Gala' apples during maturation and the influence of foliar applications of nitrogen and magnesium. Journal of the Science of Food and Agriculture, 76(1), 63-71. https://doi.org/10.1002/(SICI)1097-0010(199801)76:1<63::AID-JSFA908>3.0.CO;2-K [DOI:10.1002/(SICI)1097-0010(199801)76:13.0.CO;2-K]

88. Shaikh, N.P., Adjei, M.B., Scholberg, J.M. (2008). Interactive effect of phosphorus and nitrogen on leaf anthocyanins, tissue nutrient concentrations, and dry-matter yield of Floralta limpograss during short day length. Communications in Soil Science and Plant Analysis, 39(7-8), 1006-1015. [DOI:10.1080/00103620801925414]

89. Sorgona, A., Abenavoli, M.R., Gringeri, P.G., Cacco, G. (2006). A comparison of nitrogen use efficiency definitions in Citrus rootstocks. Scientia Horticulturae, 109(4), 389-393. [DOI:10.1016/j.scienta.2006.06.001]

90. Spayd, S.E., Wample, R.L., Evans, R.G., Stevens, R.G., Seymour, B.J., Nagel, C.W. (1994). Nitrogen fertilization of White Riesling grapes in Washington. Must and wine composition. American Journal of Enology and Viticulture, 45(1), 34-42. [DOI:10.5344/ajev.1994.45.1.34]

91. Takki Seed, A. (2017). Flowering Kale F1. http://www.takii.com/wp-content/uploads/2016/05/Flowering-Kale-F1-Feather-and-Fringe-Leaf-Rev-B-.pdf

92. Tjhia, B., Aziz, S.A., Suketi, K. (2018). Correlations between leaf nitrogen, phosphorus and potassium and leaf chlorophyll, anthocyanins and carotenoids content at vegetative and generative stage of Bitter Leaf (Vernonia amygealina Del.). Journal of Tropical Crop Science, 5(1), 23-53. [DOI:10.29244/jtcs.5.1.25-33]

93. Turan, M., Sevimli, F. (2005). Influence of different nitrogen sources and levels on ion content of cabbage (Brassica oleracea var. capitate). New Zealand Journal of Crop and Horticultural Science, 33(3), 241-249. [DOI:10.1080/01140671.2005.9514356]

94. Whipker, B.E., Gibson, J.L., Cloyd, R.A., Campbell, C.R., Jones, R. (1998). Success with ornamental cabbage and kale. Horticulture Information Leaflet, 507, 1-9.

95. Wilson, C., Albano, J., Mozdzen, M., Riiska, C. (2010). Irrigation water and nitrate-nitrogen loss characterization in southern Florida nurseries: Cumulative volumes, runoff rates, nitrate-nitrogen concentrations and loadings, and implications for management. HortTechnology, 20(2), 325-330. [DOI:10.21273/HORTTECH.20.2.325]

96. Wu, L., Li, P., Jia, H., Phillip, F.O., Bao, X., Zhao, F., Yu, K. (2021). The effect of foliar application of K2SO4 or KH2PO4 on skin color of the 'Kyoho' Grape. Agronomy, 11(11), 2361. [DOI:10.3390/agronomy11112361]

97. Zhao, D., Oosterhuis, D.M., Bednarz, C. W. (2001). Influence of potassium deficiency on photosynthesis, chlorophyll content, and chloroplast ultrastructure of cotton plants. Photosynthetica, 39(1), 103-109. [DOI:10.1023/A:1012404204910]

98. Zhao, D., Reddy, K.R., Kakani, V.G., Read, J.J., Carter, G.A. (2003). Corn (Zea mays L.) growth, leaf pigment concentration, photosynthesis and leaf hyperspectral reflectance properties as affected by nitrogen supply. Plant and Soil, 257(1), 205-218. [DOI:10.1023/A:1026233732507]