A review on hydroponic greenhouse cultivation for sustainable agriculture

Yıl 2018, Cilt: 2 Sayı: 2, 59 - 66, 10.04.2018

Fraz Ahmad Khan

https://doi.org/10.31015/jaefs.18010

Cited By: 29

Öz

The term ‘Hydroponics’
was derived from Greek word ‘hydro’
means water and ‘ponos’ mean labor.
Hydroponics is a modern agriculture technique that uses nutrient solution
rather than soil for crop production. Humans need water, food and living
habitat to endure. As population increases the food demand also increases. The
worry is that the existing system of agriculture will not be able to meet the
food requirement near future as this system is facing many challenges. The
objectives of this review paper are to discuss the hydroponic greenhouse
technologies, impact of environmental factors on hydroponic greenhouse
cultivation, advantages and challenges of hydroponic greenhouse system. This
study revealed that hydroponic greenhouse cultivation is better option in the sense
of utilization of inputs and improved crop production.  

Anahtar Kelimeler

Hydroponics, Greenhouse cultivation, Environmental factors

Kaynakça

• Adams, P. (2002). Nutritional control in hydroponics, 211–261. In: Savvas, D., Passam, H. C., Eds., Hydroponic production of vegetables and ornamentals. Embryo Publications-Athens, 463.
• AI-Amri, A. (2007). Solar energy utilization in greenhouse tomato production. Journal of King Saud University5, pp.96-115.
• Alexander, T., Parker, D. (2010). The best of the growing edge. Corvallis, Or: New Moon Pub.
• Anonymous. (1999). Dealing with quality problems in tomatoes. In: Grodan Culture Service. Vegetable Info 5, July.
• Arias, R., Lee, T. C., Specca, D., Janes, H. (2000). Quality comparison of hydroponic tomatoes (Lycopersicon esculentum) ripened on and off vine. Journal of Food Science, 65(3), 545–548.
• Bakker, J. C. (1984). Physiological disorders in cucumber under high humidity conditions and low ventilation rates in greenhouses. Acta Hort. 156: 257–264.
• Bakker, J. C. (1990a). Effects of day and night humidity on yield and fruit quality of glasshouse tomato (Lycopersicon esculentum Mill.). J. Hort. Sci. 65: 323–331.
• Bakker, J. C. (1990b). Effects of day and night humidity on yield and fruit quality of glasshouse eggplant (Solanum melongena L.). J. Hort. Sci. 65: 747–753.
• Banda-Guzman, J. Lopez-Salazar, A. (2014). Success Factors in Pepper Greenhouses-Case Study: Queretaro, Mexico. International Journal of Business Administration,5, p.96.
• Banerjee C., Adenaeuer, L. (2014). Up, Up and Away! The economics of vertical farming,” Journal of Agricultural Studies, vol. 2, no. 1, pp. 40-60.
• Beibel, J.P. (1960). Hydroponics -The Science of Growing Crops Without Soil‖. Florida Department of Agric. Bull. p. 180.
• Bellona Foundation, (2009). The sahara forest project. Retrieved September 13, 2011, from http://www.saharaforestproject.com.
• Benoit F., Ceustermans, N. (1988). Growing lamb's lettuce (Valerianella olitoria L.) on recycled polyurethane (PUR) hydroponic mats in Proc. International Symposium on Diversification of Vegetable Crops, vol. 242, pp. 297-304. Benoit, F. (1987). Cultivation of lettuce. Review of Agriculture 40(2): 895–903.
• Bohme, M. (1996). Influence of closed systems on the development of cucumber. ISOSC, Proceedings.75-87.
• Bridgewood, L. (2003). Hydroponics: Soilless gardening explained. Ramsbury, Marlborough, Wiltshire: The Crowood Press Limited.
• Bruckner, B., Krumbein, A., Schwarz, D., Klaring, P. (2004). Temperature Effects on Tomato Quality. IX International Symposium on Soilless Culture and Hydroponics, Almeria, Spain, 14–19 November 2004. Book of summary,173.
• Buchanan, D. N., Omaye, S. T. (2013). Comparative Study of Ascorbic Acid and Tocopherol Concentrations in Hydroponic- and Soil-Grown Lettuces. Food and Nutrition Sciences, 04(10), 1047–1053.
• Butler, J.D., Oebker, N.F. (2006). Hydroponics as a Hobby Growing Plants Without Soil. Circular 844. Information Office, College of Agriculture, University of Illinois, Urbana, IL 61801.
• Cantliffe, D. J. Vansickle, J. J. (2012). Competitiveness of the Spanish and Dutch greenhouse industries with the Florida fresh vegetable industry.
• Carruthers, S. (2011). Branding hydroponics. Practical Hydroponics and Greenhouses, 9, pp.1-15.
• Caruso, G., Villari, A., Villari, G. (2004). Quality characteristics of “Fragaria vesca L.” fruits influenced by NFT solution EC and shading. Acta Hort. 648:167–174.
• Chueca, A., Lázaro, J.J., Gorgé, J.L. (1984). Light-induced nuclear synthesis of spinach chloroplast fructose-1, 6-bisphosphatase. Plant Physiology, vol. 75, no. 3, pp. 539-541.
• Cockshull, K. E. (1998). Plant responses and adaptation to water issues in the greenhouse environment. Acta Hort. 458: 201–206.
• Cockshull, K. E., Ho, L. C. (1995). Regulation of tomato fruit size by plant density and truss thinning. J. Hort. Sci. 70(3): 395–407.
• CSUE. (2011). Plant Growth Factors: Light, Colorado State University Extension (CSUE). CMG Garden Notes #142. [Online]. Available: http://www.ext.colostate.edu/mg/gardennotes/142.pdf.
• De Kreij C., Voogt W., Baas R. (1999). Nutrient solutions and water quality for soilless cultures. Research Station for Floriculture and Glasshouse Vegetables (PBG), Naaldwijk, The Netherlands, Brochure 196.
• DeKorne, J.B. (2009). The hydroponic hot house: Low-cost, high-yield greenhouse gardening. Port Townsend, Wash: Breakout Productions.
• Despommier, D. (2009). The rise of vertical farms. Scientific American, vol. 301, no. 5, pp. 80-87.
• Dhakal, U., Salokhe, V.M., Tatau, H.J., Max, J. (2005). Development of a green nutrient recycling system for tomato production in humid tropics. Agriculture Engineering International. Vol. VII, October. http//www.cigrejournal.tamu.edu/s
• Dorais, M., Demers, D. A., Papadopoulos, A. P., van Ieperen, W. (2004). Greenhouse tomato fruit cuticle cracking. Hort. Reviews 30: 163–173.
• Dorais, M., Gosselin, A. (2002). Physiological response of greenhouse vegetable crops to supplemental lighting. Acta Hort. 580: 59–67.
• Dorais, M., Papadopoulos, A., Gosselin, A. (2001). Greenhouse tomato fruit quality. Hort. Reviews 26: 239–319.
• Drews, M., Schonhof, I., Krumbein, A. (1995). Nitrat-, Vitamin C-, ß-Carotin- und Zuckergehalt von Kopfsalat im Jahresverlauf beim Anbauim Gew¨achshaus (Lactuca sativa L.). Gartenbauwiss. 60(4): 180–187.
• Drews, M., Schonhof, I., Krumbein, A. (1996). Gehalt an Nitrat-, Vitamin C, und Zucker in Kopfsalat (Lactuca sativa L.) in Abh¨angigkeit von Sorte und Stadium der Kopfentwicklung. Gartenbauwiss. 61(3): 122–129.
• Ellis, N.K., Jensen, M., Larsen, J., Oebker, N. (1974). Nutri-culture Systems Growing Plants Without Soil. Station Bulletin No. 44. Purdue University, Lafayette, Indiana. FAO. (2005). http.//faostat.fao.org Gaudreau, L., Charbonneau, J. V´ezina, L. P., Gosselin, A. (1994). Photoperiod and photosynthetic photon flux influence growth and quality of greenhouse grown lettuce. HortScience 29: 1285–1289.
• Geissler, T. (1985). Vegetable production under glass and plastic. VEB German Agricultural Publishing Berlin, p. 279th.
• George P. (2010). A Brief History of Hydroponics, http://ezinearticles.com. (Last cited on 2010 Dec 28).
• Gibbs, M., Calo, N. (1959). Factors affecting light induced fixation of carbon dioxide by isolated spinach chloroplasts. Plant Physiology, vol. 34, no. 3, pp. 318.
• Grange, R. I., Hand, D. W. (1987). A review of the effects of atmospheric humidity on the growth of horticultural crops. J. Hort. Sci. 62(2): 125–134.
• Grewal, H.S., Maheshwari, B. Parks, S.E. (2011). Water and nutrient use efficiency of a low-cost hydroponic greenhouse for a cucumber crop: An Australian case study. Agricultural water management,98, pp.841-846.
• Grimstad, S. O., 1987. Supplementary lighting of early tomatoes after planting out in glass and acrylic greenhouses. Sci. Hortic. 33(3–4): 189–196.
• Guichard, S., Bertin, N., Leonardi, C., Gary, C. (2001). Tomato fruit quality in relation to water and carbon fluxes Review article. Agronomy 21: 385–392.
• Gul, A., Tuzel, I.H., Tuneay, O., Eltez R.Z., Zencirkiran, E. (1999). Soilless culture of cucumber in glasshouse: I. A comparison of open and closed systems on growth, yield and quality. Acta hort. 491: 389-394. Haifa Chemicals (2014). Nutritional recommendations for CUCUMBER in open field’s tunnels and greenhouses.
• Haifa Chemicals ltd. [Online]. Available: http://www.haifa-group.com/files/Guides/Cucumber.pdf Hao, X., Papadopoulos, A. (1999). Effects of supplemental lighting and cover materials on grown, photosynthesis, biomass partitioning, early yield and quality of greenhouse cucumber. Sci. Hortic. 80: 1–18.
• He, F. Ma, C. (2010). Modeling greenhouse air humidity by means of artificial neural network and principal component analysis. Computers and Electronics in Agriculture,71, pp.19-S23.
• Hickman, G.W. (2011). A review of current data on international production of vegetables in greenhouses. www.cuestaroblecom, 73 p.
• Higashide, T., Kasahara, Y., Ibuki, T. Sumikawa, O. (2013). Development of closed, energy-saving hydroponics for sloping land. In International Conference on Sustainable Greenhouse Systems-Green sys 2004, 691, pp.243-248.
• Hikosaka, S., Sasaki, K., Goto, E., Aoki, T. (2008). Effects of in vitro culture methods during the rooting stage and light quality during the seedling stage on the growth of hydroponic ever bearing strawberry in Proc. International Strawberry Symposium. vol. 842, pp. 1011-1014.
• Hochmuth, G. J., Hochmuth, R. C., (2001a). Nutrient solution formulation for hydroponic (perlite, rockwool, NFT) tomatoes in Florida. HS796. Univ. Fla. Coop. Ext. Serv., Gainesville.
• Hochmuth, R., Hochmuth, G. J. (2001b). A decade of change in Florida's greenhouse vegetable industry: 1991-2001. In Proc. Fla. State Hort. Soc., 114, pp. 280-283.
• Holder, R., Cockshull, K. E. (1990). Effects of humidity on the growth and yield of glasshouse tomatoes. J. Hort. Sci. 65(1): 31–39.
• How Stuff Works, Inc. (2014). Vertical Farm Designs and Challenges. Environmental Science, Conservation Issues. [Online]. Available: http://science.howstuffworks.com/environmental/conservation/issues/verticalfarming1.htm James, D.B., Gandhi, A.D., Palaniswamy, N., Rodrigo, J.X. (1994). Hatchery techniques and culture of the sea-cucumber Holothuria scabra. CMFRI Special Publication, vol. 57, pp. 1-40.
• Jauert, P., Schumacher, T.E., Boe, A., Reese, R.N. (2002). Rhizosphere acidification and cadmium uptake by strawberry clover. Journal of Environmental Quality, vol. 31, no. 2, pp. 627-633.
• Jayaraman, J., Norrie, J., Punja, Z.K. (2011). Commercial extract from the brown seaweed Ascophyllum nodosum reduces fungal diseases in greenhouse cucumber. Journal of Applied Phycology. vol. 23, no. 3, pp. 353-361.
• Jensen, M.H. (2007). Hydroponics worldwide. In International Symposium on Growing Media and Hydroponics, 481, pp.719-730.
• Jones Jr, J.B. (2012). Hydroponics: A practical guide for the soilless grower. New York: CRC press.
• Kaya, C., Higgs, D., Burton, A. (2000). Plant growth, phosphorus nutrition, and acid phosphatase enzyme activity in three tomato cultivars grown hydroponically at different zinc concentrations. Journal of Plant Nutrition, vol. 23, no. 5, pp. 569-579.
• Kays, S. J. (1999). Preharvest factors affecting appearance. Postharvest biology and technology 15: 233–247.
• Kim, H.H., Chun, C., Kozai, T., Fuse, J. (2000). The potential use of photoperiod during transplant production under artificial lighting conditions on floral development and bolting, using spinach as a model. Hort. Science, vol. 35, no. 1, pp. 43-45.
• Koyama, M., Nakamura, C., Kozo, N. (2013). Changes in phenols contents from buckwheat sprouts during growth stage. Journal of Food Science and Technology, 50(1), 86–91.
• Kuennen, D.S., Forsythe Jr, R.G. Bullock, W. (2008). A Small University Helps Small Farms, Addresses Big Problems. Journal of Higher Education Outreach and Engagement, 12, pp.151-166.
• Lieten, F. (1992). Methods and strategies of strawberry forcing in central Europe: Historical perspectives and recent developments,” in Proc. International Strawberry Symposium, vol. 348, pp. 161-170. Maharana, L., Koul, D.N. (2011). The emergence of Hydroponics. Yojana (June). 55: 39-40.
• Marcelis, L. F. M. (1993). Fruit growth and biomass allocation to the fruits in cucumber. 1. Effect of fruit load and temperature. Sci. Hortic. 54: 107–121.
• Marcelis, L. F. M., Baan Hofman-Eijer, L. R. (1993). Effect of temperature on growth of individual cucumber fruits. Physiol. Plantarum 87: 321–328.
• Mathieu, J., Linker, R., Levine, L., Albright, L. (2006). Evaluation of the Nicolet model for simulation of short-term hydroponic lettuce growth and nitrate uptake. Biosystems Engineering, vol. 95, no. 3, pp. 323-337.
• Mattas, K., Bentes, M., Paroussi, G., Tzouramani, I. (1997). Assessing the economic efficiency of a soilless culture system for off-season strawberry production,” Hort Science, vol. 32, no. 6, pp. 1126-1129.
• Mortensen, L.V. (1987). CO2 enrichment in greenhouses. Crop responses. Review article. Sci. Horticulture. 33(1–2): 1–25.
• Nowak, T.J. (1980). Effect of foliar fertilization of Capsicum annuum L. together with optimal root fertilization in hydroponic culture on fruit yield and its capsaicin content. Acta Agro-botanica, vol. 33, no. 1, pp. 59-71. Off-Grid-World. (2012). Vertical Farm. [Online]. Available: http://www.offgridworld.com/vertical-farm/
• Othman, Y., Al-Karaki, G. Al-Ajmi, A. (2008). Response of soilless grown sweet pepper cultivars to salinity. In International Symposium on Strategies Towards Sustainability of Protected Cultivation in Mild Winter Climate, 807, pp.227-232.
• Ottosen, C. O., Rosenqvist, E., Sørensen, L. (2003). Effect of a dynamic control on energy saving, yield and shelf life of spring production of bell peppers (Capsicum annum L.). E. J. Hort. Sci. 68(1): 26–31.
• Pardossi, A., Giacomet, P., Malorgio F., Albini, F. M., Murelli, C., Serra, G., Vernieri, P., Tongnoni, F., 2000. The influence of growing season on fruit yield and quality of greenhouse melon (Cucumis melo L.) grown in nutrient film technique in a Mediterranean climate. J. Hortic. Sci. Biotech. 75(4):488–493.
• Peckenpaugh, D.J. (2004). Hydroponic solutions: Volume 1. Corvallis: New Moon Pub.
• Peet, M. M. (1999). Greenhouse crop stress management. Acta Hort. 481: 643–654.
• Prohens, J., Miro, R., Rodriguez-Burruezo, A., Chiva, S., Verdu, G., Nuez, F. (2004). Temperature, electrolyte leakage, ascorbic acid content and sunscald in two cultivars of pepino, Solanum muricatum. J. Hortic. Sci. Biotech. 79(3): 375–379.
• Prosser, I.M, Purves, J.V, Saker, L.R, Clarkson, D.T. (2001). Rapid disruption of nitrogen metabolism and nitrate transport in spinach plants deprived of sulphate. Journal of Experimental Botany. vol. 52, no. 354, pp. 113-121.
• Puri, V. Caplow, T. (2009). How to grow food in the 100% renewable city: Building integrated agriculture. 100% renewable: Energy autonomy in action.
• Rathinasabapathi, B. (2011). The Vertical Farm.HortScience,46, pp.333-333.
• Raviv M., Krasnovsky A., Medina S., Reuveni R. (1998). Assessment of various control strategies for recirculation of greenhouse effluents under semi-arid conditions. Journal of Horticultural Science and Biotechnology. 73(4), 485–491.
• Research News. "Commercial Aeroponics: The Grow Anywhere Story," In Vitro Report (Society for In Vitro Biology), Issue 42.2 (April – June 2008).
• Resh, H. M., Howard, M. (2012). Hydroponic Food Production: A Definitive Guidebook for the Advanced Home Gardener and the Commercial Hydroponic Grower. In Santa Bárbara, California EUA (Sixth).
• Resh, H.M. (1993). Hydroponic food production. California: Woodbridge Press Publishing Company.
• RIRDC. (2001). Hydroponics as an Agricultural Production System, Publication No 01/141, Project No HAS-9A, Rural Industries Research and Development Corporation (RIRDC), Australian Government, Kingston, PO Box 4776, ACT 2604.
• Ruth, S. (2009). Home Hydroponics. Extension Technician, Diane Relf, Extension Specialist, Horticulture, Virginia Tech. Virginia Cooperative Extension, Publication 426-084, Virginia State University. [Online]. Available: http://pubs.ext.vt.edu/426/426-084/426-084_pdf.pdf.
• Savvas, D., Stamati, E., Tsirogiannis, I.L., Mantzos, N., Barouchas, P.E., Katsoulas, N. Kittas, C. (2007). Interactions between salinity and irrigation frequency in greenhouse pepper grown in closed-cycle hydroponic systems. Agricultural Water Management,91, pp.102-111.
• Schnitzler, W. H., Gruda, N. (2002). Hydroponics and product quality. In: Hydroponic Production of Vegetables and Ornamentals. pp. 373–411.
• Seginer, I, Shina, G, Albright, L.D, Marsh, J.S. (1991). Optimal temperature setpoints for greenhouse lettuce. Journal of Agricultural Engineering Research. vol. 49, pp. 209-226.
• Shaw, N. L., Cantliffe, D. J. Taylor, B. S. (2001). Hydroponically produced ‘Galia’ muskmelon What’s the secret. In Proc. Fla. State Hort. Soc, 114, pp. 288-293.
• Siddiqi, M.Y., Malhotra, B., Min, X., Glass, A.D. (2002). Effects of ammonium and inorganic carbon enrichment on growth and yield of a hydroponic tomato crop. Journal of Plant Nutrition and Soil Science, vol. 165, no. 2, pp. 191. Sigrimis, N., Antsaklis, P. Groumpos, P.P. (2013). Advances in control of agriculture and the environment. Control Systems, IEEE, 21, pp. 8-12.
• Silkova, O. G., Leonova, I. N., Krasilova, N. M. Dubovets, N. I. (2011). Preferential elimination of chromosome 5R of rye in the progeny of 5R5D dimonosomics. Russian Journal of Genetics, 47(8), pp. 942-950.
• Simeonova, E., Garstka, M., Kozioł-Lipińska, J., Mostowska, A. (2004). Monitoring the mitochondrial transmembrane potential with the JC-1 fluorochrome in programmed cell death during mesophyll leaf senescence. Proto-plasma, vol. 223, no. 2-4, pp. 143-153.
• Singh, S., Singh, B. S., 2012. Hydroponics – A technique for cultivation of vegetables and medicinal plants‖. In. Proceedings of 4th Global conference on Horticulture for Food, Nutrition and Livelihood Options‖ Bhubaneshwar, Odisha, India. p.220.
• Sonneveld, C., Voogt, W. (1999). Chemical analysis in substrate systems and hydroponics-use and interpretation in Proc. International Symposium on Growing Media and Hydroponics, vol. 548, pp. 247-260. Stone, M. (2014). How to Hydroponics: A Beginner's and Intermediate's In-Depth Guide to Hydroponics. Oxford: Martha Stone.
• Succop, C.E. Newman, S.E. (2009). Hydroponic Greenhouse Production of Fresh-market Basil in Colorado. HortScience,32, pp.519-519.
• Tabatabaei, S.J., Yusefi, M., Hajiloo, J. (2008). Effects of shading and NO3: NH4 ratio on the yield, quality and N metabolism in strawberry. Scientia Horticulturae, vol. 116, no. 3, pp. 264-272.
• Taig, L. (2012). Greenhouse technical management for the future. Practical Hydroponics and Greenhouses, 122, p.30.
• Takakura, T. (2014). Greenhouse production in engineering. Mathematical and Control Applications in Agriculture and Horticulture, 5, p.19.
• Tavassoli, A., Ghanbari, A., Ahmadian, A. (2010). Effect of zinc and manganese nutrition on fruit yield and nutrient concentrations in greenhouse tomato in hydroponic culture. Journal of Science and Technology of Greenhouse Culture,1, pp.1-7.
• Thompson, H.C., Langhans, R.W., Both, A.J., Albright, L.D. (1998). Shoot and root temperature effects on lettuce growth in a floating hydroponic system. Journal of the American Society for Horticultural Science, vol. 123, no. 3, pp. 361-364.
• Tuzel, I.H., Irget, M.E., Gul, A., Tuncay, O., Eltez, R.Z. (1999). Soilless culture of cucumber in glasshouses: II A Comparison of open and closed systems on water and nutrient consumptions. Acta Hort. 491:395-400.
• Tyson, R., Hochmuth, R., Lamb, E., McAvoy, E., Olczyk, T. Lamberts, M. (2004). Greenhouse vegetables in Florida's mild winter climate-2004 update. Acta Horticulture, 659, pp.37-40.
• Van Os E A., Gieling Th H., Ruijs M.N.A. (2002). Equipment for hydroponic installations. In: Hydroponic Production of Vegetables and Ornamentals (Savvas D; Passam H C, eds), pp 103–141. Embryo Publications, Athens, Greece.
• Van Os, E.A. (1995). Engineering and environmental aspects of soilless growing systems. Acta Hort. 396: 25-32. Van Os, E.A. (1999). Closed Soilless Growing Systems: A Sustainable Solution for Dutch, Greenhouse Horticulture.
• Van Os, E.A., Ruijs, N.A., Van WeeI, P.A. (1991). Closed business systems for less pollution from greenhouses. Acta Hort. 294: 49-57.
• Vollebregt, R. Brantford, O.N. (2014). The potential of retractable roof greenhouses to dominate greenhouse designs in the future. Acta Horticulture, 8, pp.43-50.
• Vonk Noordegraaf, C., Welles, G. W. H. (1995). Product quality. In: Greenhouse Climate Control. pp. 92–97. Waisberg, M., Black, W.D., Waisberg, C.M., Hale, B. (2004). The effect of pH, time and dietary source of cadmium on the bio-accessibility and adsorption of cadmium to/from lettuce (Lactuca sativa L. Ostinata). Food and Chemical Toxicology, vol. 42, no. 5, pp. 835-842.
• Warren, W. J., Hand, D. W., Hannah, M. A., 1992. Light interception and photosynthetic efficiency in some glasshouse crops. J. Exp. Bot. 43: 363–373.
• Watson, R., Wright, C. J., McBurney, T., Taylor, A. J., Linforth, R. S. T. (2002). Influence of harvest date and light integral on the development of strawberry flavor compounds. J. Exp. Bot. 53(377): 2121–2129.
• Wells, J. (2014). Greenhouse Maintenance: Selected Tips on Maintaining Your Greenhouse. Max-House.
• Weston, L. A., Barth, M. M., 1997. Preharvest factors affecting postharvest quality of vegetables. HortScience 30(5): 812–816.
• White, P. J. (2002). Recent advances in fruit development and ripening. An overview. J. Exp. Bot. 53(377): 1995–2000.
• Winsor, G. W. (1979). Some factors affecting the quality and composition of tomatoes. Acta Hort. 93: 335–341.
• Winsor, G. W., Adams, P. (1976). Changes in the composition and quality of tomato fruit throughout the season. Ann. Rep. Glasshouse Crops Res. Inst.134–142.
• Zipelevish, E., Grinberge, A., Amar, S., Gilbo,Y., Kafkafi, U. (2000). Eggplant dry matter composition fruit yield and quality as affected by phosphate and total salinity caused by potassium fertilizers in the irrigation solution. J. Plant Nutr. 23(4): 431–442.
• Zornoza, P., Caselles, J., Carpena, O. (1987). Response of pepper plants to NO3: NH4 ratio and light intensity. Journal of Plant Nutrition, vol. 10, no. 7, pp. 773-782.