REFERANCES:
Abd El-Fattah, M.A. and Mervat E Sorial (1998): Efficiency of biofertilization on response of the productivity and chemical composition of lettuce plants grown under different nitrogen levels. Menofiya J. Agric. Res., Vol. 23(5): 1185-1207.
Abdel-Razik, A.H. (1996): Response of lettuce to N-rates and Wuxal foliar fertilizer in sandy soil. Alex. J. Agric. Res., 41(2): 359-368.
Abdel-Razik, A.H. and M. A. S. Barakat (1990): Effect of nitrogen and GA3 on vegetative growth, head weight and seed production of lettuce. Alex. J. Agric. Res., 35(2): 77-87.
Agwah, E. M. R. and A. F., Shahaby (1993): Associative effect of Azospirillum on vitamin C, chlorophyll content and growth of lettuce under field conditions. Annals Agric. Sci., Ain Shams Univ., Cairo, 38(2): 423-434.
Ahmed, A.H H (1996): Physiological studies on tipburn and nitrate accumulation in lettuce plants. J. Agric. Sci. Mansoura Univ. 21(11):3971-3991.
Ahmed, A. H. H. (1997): Effect of foliar application of some chemicals on sex expression of squash plants. J. Agric. Sci. Mansoura Univ. 22(3):697-717.
Ahmed, A.H H.; J.F. Mishriky and M.K. khalil (2000): Reducing nitrate accumulation in lettuce (Lactica Sativa L.) plants by using different biofertilizers. Cairo University, Egypt, September, 2000, page 509-517.
Ahmed, M. M. M and E. B. A. Osman (2003): Response of peanut plants grown a sandy calcareous soil to fertilization with farmyard manure and organo-mineral fertilizer prepared from some sugar cane wastes. Assiut. J. Agric. Sci., Vol.34 (6): 337-347.
Ahmed, M. M. M. (1997): Utilization of certain sugar industry wastes for fertilization of some crops. M. Sc. Thesis, Fac. Agric., Assiut Univ., Egypt.
Ahmed, M. M. M. (2001): Response of some fruit trees grown on the desert soil of Wadi El-Assiti to fertilization using certain sugar industry by-products. Ph. Sc. Thesis, Fac. Agric., Assiut Univ., Egypt.
Ahmed, M. M. M. and Ali, E. A. 2005. Effect of different sources of organic fertilizers on the accumulation and movement of NPK in sandy calcareous soils and the productivity of wheat and grain sorghum. Assiut. J. Agric. Sci., Vol.36 (3): 147-159.
Awny, S.A. and M.M., Moursy (1992). Lettuce and endive plant foliage chemical constituents and nitrate residues as affected by different levels of ammonium nitrate fertilizer at sandy soils. Bull of Suez Canal Univ. Appl. Sci., 1 :515-528.
Azcon, R.; M. Gomez and R. tobar (1996): Physiological and nutritional responses by Lactuca sativa, L. to nitrogen sources and mycorrhizal fungi under drought conditions. Biology and Fertility of Soils, 22 (1/2):156-161.
Bakr, A. A. and R.A. Gawish (1997): Trials to reduce nitrate and oxalatc content in some leafy vegetables. 2. Interactive effects of the manipulating of the soil nutrient supply, different blanching media and preservation methods followed by cooking process. J. sci. Food Agric. 73, 169-178.
Bardisi, A. and E. A. Abdel-Bary (2000): Growth and yield of lettuce (Lactuca sativa L.) and nitrate and nitrite accumulation as affected by nitrogen sources and rates. Zagazieg J. Agric. Res. Vol. 27(4): 1053-1067.
Blom-Zandstra, M. (1989): Nitrate accumulation in vegetables and its relationship to quality. Ann. Appl. Bio., 155:553-561.
Brown, M. E., (1974): Seed and root bacterization. Annual Rev., Phtopathol., 12: 181-197.
Cameria, C.,; E. Cainavarro; B. Saltao; J. Moreira; A.A. Monteriro and E.P. Vasconcc; os (2000): Yield and leaf nitrate content of lettuce on response to nitrogen fertilization. Xth International colloquium for the optimization of plant nutrition. Cairo, Egypt.
Carletti, S.; C.E., Rodriguez and B. Liorente (1996): Effect of biofertilizer application on Jojoba cultivation. Assocition for the Advan. of Indust. Crop. (1996): 53-55 (C.F. Hort. Abst., 1997,67(2):1599).
Cash ,D., R. Funston, M. King and D. Wichman (2002): Nitrate toxicity of Montana forages. Montana State University, Bozeman, MT 59717.
Causeret, J. (1984): Nitrates, nitrites, nitrosamines: Apports alimentaires et sante. Ann. Fals. Exp. Chim. 77:131-151.
Chabot, R.; H. Anttoun and M.P. Cescas (1996): Growth promotion of maize and lettuce by phosphate-solubilizing Rhizobium. Plant & Soil, 184 (2): 311-321.
Choudhury, B. (1967): Vegetables New Delhi: National Book Trust. Pp. 176-179.
Custic, M.; M. Poliak and T. Cosic (1994): Nitrate content in leaf vegetables as related to nitrogen fertilization in Croalia. Acta Horiculturae, 371:407-412.
Custic, M.; M. Poljak; L. Coga; T., Cosic; N. Toth and M., Pecina (2003):The influence of organic and mineral fertilization on nutrient status, nitrate accumulation and yield of head chicory. Plant Soil Eviron., 49 (5) :218-222.
Elbordiny, M. M.; T. A. Taha and A. S. El-Sebaay. (2003): Evaluating nitrogen fertilizer sources and scheduling for cotton. Egypt. J. Soil. Sci. 43 (3): 435-445
El-Etr, Wafaa, T.; Laila, K. M and Elham, I. El-Khatib. (2004): Comparative effects of bio-compost and compost on growth, yield and nutrients content of pea and wheat plants grown on sandy soils. Egypt. J. Agric. Res., 82 (2):73-94.
El-Gamal, A. M. (1996): Response of potato in the newly reclaimed area to mineral nitrogen levels and nitrogen fixing bio-fertilizer Halex 2. Assiut J. of Agric. Sci., 27(2): 89-99.
El-Hassan, E. (1990): Yield and nitrate content of lettuce in relation to some culture practices. Bull. Fac. Agric., Univ. of Cairo 41 (2): 407-417.
Elsharawy, M. A. O.; M. A. Aziz and Laila K. M. Ali. (2003): Effect of the application of plant residues composts on some soil properties and yield of wheat and corn plants. Egypt. J. Soil. Sci. 43 (3): 421-434.
El-Shinawy, M. Z., E.M. Abd-Elmoniem, A.F. Abou-Hadid. (1999): The use of organic manure for lettuce plants grown under NFT conditions. International Society for Horticultural Science 491 No. 6 Vol. 1. 1999.
Gardener, B.R. and W.D. Pew (1974). Response of spring grown head lettuce to nitrogen fertilizer. Tech. Bull. Arizona Agric. Exp. St. No. 210 (C.F. Hort. Abst., (9):1975).
Gawish, R.A. (1997): Trials to reduce nitrate and oxalate contents in some leafy vegetables. 1. Interactive effect of different nitrogen fertilization regimes and nitrification inhibitor (Nitrapyrin) on growth and yield of both spinach and lettuce. Zagazig J. Agric. 24(1):83-100.
Georgios C. Pavlou, Constantinos D. Ehaliotis and Victor A. Kavvadias (2007): Effect of organic and inorganic fertilizers applied during successive crop seasons on growth and nitrate accumulation in lettuce. Scientia Horticulturae Vol. 111: 319-325.
Gomez, K.A. and A.A. Gomez (1984): Statistical procedure for Agric. Res. 2nd ed. Johnwiley and Sons Inc. New York, 680 pages.
Hajislova, J.’ V. Schulzova; PSlanina; K. Janne; K.E. Hellenas and C., Andersson (2005): Quality of organically and conventionally grown potatoes: Four year study of micronutrients, metals secondary metabolites, enzymic browning and organoleptic properties. Food Addit. Contan. 19:524-532.
Herencia, J.F.; J.C., Ruiz-Porras; S. Melero; P.A. Garcia-Galavis; E. Morillo and C. Maqueda (2007): Comparison between organic and mineral fertilization for soil fertility levels, crop macronutrient concentrations and yield. Agron. J. 99: 973-983.
Jackson, M.L. (1958): Soil chemical analysis. Printic-Hall, Englwood Cliffs, New Jersey.
Keeney, D R. and D. W. Nelson (1982): Nitrogen inorganic forms. In A. L. Page, (ed). Methods of soil analysis. Part 2, 2nd ed. Agronomy.
Khier, N.F.; A.H.H Ahmed; E.A. Abou El-Hassan and E. M. Z. Harb (1991): Physiological studies on the hazardous nitrate accumulation in some vegetables. Buul Fac. Agric Univ. of Cairo. 42 (2): 557-576.
Kumaraswamy, D. and B.B. Madalageri (1990): Effect of Azotobacter inoculation on tomato. South Indian Horticulture, 38 (2): 188-192.
Lazarovits, G. and J. Nowak (1997): Rhizobacteria for improvement of plant growth and establishment. HortScience, 32 (2): 188-192.
Maftoun, M.; F. Moshiri; N. Karimian and A. M. Ronaghi. (2004): Effects of two organic wastes in combination with phosphorus on growth and chemical composition of Spinach and soil properties. J. Plant Nut., 27(9): 1635-1651.
Maftoun, M.;F. Moshiri; N. Karimian and A.M. Ronaghi (2004): Effects of two organic wastes in combination with phosphorus on growth and chemical composition of Spinach and soil properties. J. Plant Nut., 27 (9): 1635-1651.
Mahmoud, M. R. (2000): Improvement of soil fertility and sorghum production as a result of composts and phosphorus fertilizers application. Minia J. of Agric. Res. & Develop., Vol. 20 (3): 553-572.
Malmauret, L; D. Parent-Massin; J. I. Hardy and P. Verger (2002): Contaminants in organic and conventional foodstuffs in France. Food Addit. Contam. 19:524-532.
Maynard, D. N.; A.V. Barer; P.L. Minotti and N.H. Peck (1976): Nitrate accumulation in vegetables. Adv. Agron. 28:71-118.
Maynard, D. N.; A.V. Barker; P.L. Minotti and N.H., Peck (1976): Nitrate accumulation in vegetables. Adv. Agron., 28:71-118.
Mohamed, W. H. and M.A. Hussein. (2005): Effect of some organic fertilizers and sulphur application on root yield and nutrient uptake of sugar beet in relation to some soil tests. J. Adv. Agric. Res. (Fac. Agric. Saba Basha)., Vol. 25 (6): 3541-3558.
Monica L. Porto; Jailson do Calves; Adalison P. de Souza; Rannira da C Araujo and Jandeilson A de Arruda (2008): Nitrate production and accumulation in lettuce as affected by mineral Nitrogen supply and organic fertilization. Hotic. Bras., vol. 26(2):227-230.
Moussa, A. G., M. A .El-Shal; A.H. Abdel-Razik AND h., Abdel-Razik (1993): Efficiency of organic and inorganic fertilization on yielding of lettuce (Lactuca sativa, L.). Zagazig J. Agric. Res., 20(5):1583-1592.
Noel, T. C.; C. Sheng; C.K. Yost; R.P. Pharis and M. E. Hynes (1996): Rhizobium leguminosarum as a plant growth-promoting rhizobacterium: direct growth promotion of canola and lettuce. Can. Jour. of Microbiol., 42(3):279-283.
Pandy, A. and S. Kumar (1989): Potential of Azotobacter and Azospirilla as biofertilizers for upland agriculture: a review. Jour. of Scientific & Industrial Research, 48(3): 134-144 (C.F. Hort., Abst., 60:796).
Pew, W.D., B.R. Gardner and PM Bessey (1984): A comparison of controlled-release and certain soluble nitrogen fertilizers on yield and maturity in spring-grown head lettuce. J. Amer. Soc. Hort. Sci., 109(4): 531-535.
Richared, J. G.; F. J. Sundstrom; J. A. Grimas; J.P. Geaghan and W.W. Etzel (1985): Predicated effect of temperature and N fertilizer on crop response of four cultivars of head lettuce. Commun. Soil Sci. Plant Analysis, 16(6):583-613.
Ruiz-Lozano, J.M.; R. Azcon and M., Gomez (1995): Effect of arbuscular-mycorrhizal Glomus species on drought tolerance: Physiological and nutritional plant response. Applied and Environmental Microbiology, 61(2):456-460.
Sanchez, C.A.; H.W. Burdine; V. L. Guzman and C.B. Hall (1989): Yield, quality and leaf nutrient composition of crisphead lettuce as affected by N, P and K on Histosios. Proc. of the Ann. Meeting of the Florida Stat Hort. Soc., 101:346-350 (C.F. Hort. Abst., 61:6839).
Shafshak, N. and F.A. Abo-Sedera (1990): Effect of different nitrogen sorces and levels on growth, yield and nitrate accumulation in some lettuce varieties. Ann Agric. Sci. Moshtohor, 28(1): 619-631.
Smith, S.R. and P. Hadley (1989): A comparison of organic and inorganic nitrogen fertilizers: Their nitrate-N and ammonium-N release characteristics and effects on the growth response of lettuce (Lactuca sativa L. cv. Fortune). Plant and Soil, Volume 115: 135-144.
Snedecor, G.W. and W.G., Cochran (1972): Statistical methods. 6th Ed. Iowa State Univ. Press, Iowa, U.S.A., pp. 120-245.
Soundy, P. and I.E. Smith (1992): Response of lettuce to nitrogen and phosphorus fertilization. Jour. South African Soc. For Hort. Sci., 2 (2): 82-85 (C.F. Hort. Abst., 1996, 66 (7): 5845).
Valšíková, M. and A. Viteková (2006): The effect of Lignofert organic fertilizer on formation and quality of head lettuce yield. Hort. Sci. (Prague), 33, 2006 (3): 114–118.
Vogtmann, H., K., Matthies; B. Kehres and A. Meier-Ploeger (1993): Enhanced food quality: Effects of compost on the quality of plant foods. Compost Sci. Util. 1:82-100.
Walworth, J.L., D.E. Clarting and G. J. Michaelson (1992): Nitrogen sources and rates for direct-seeded and transplanted head lettuce. Hortscience, 27:228-230.
Wange, S.S. (1996). Effect of biofertilizer under graded nitrogen levels on carrot (Daucus carota L.). Annals of Plant Physiology, 10 (1): 96-98.
Williams, C. M. (2002): Nutritional quality of organic food: shades of grey or shade of green. Proc. Nutr. Soc. 61:19-24.
Zhong, L.F., T. Kato, X P Xu and Y. Fukumoto (1989): Comparative studies on the physiological characteristics in solanaceous fruit vegetables, 4. Effect of nitrogen form on hormone level in shoot apices, chemical constituents and photosynthetic function. Research Reports of the Kochi Univ., Agricultural Science, 38: 35-40 (C.F. Hort. Abst., 61:3619).
)
View on SCiNiTO