REFERENCES
- Abbas , M. A. , Younis , M. E. and Shukry , W. M. 1991 . Plant growth, metabolism and adaptation in relation to stress conditions. XIV. Effect of salinity on the internal solute concentration in Phaseolus vulgaris . Journal of Plant Physiolgy , 138 : 722 – 727 .
- Aliyu , L. 2000 . Effect of organic and mineral fertilizers on growth, yield and composition of pepper (Capsicum annuum L.) . Biological Agriculture and Horticulture , 18 : 29 – 36 .
- Aloni , B. , Karni , L. , Zaidman , Z. and Schaffer , A. A. 1996 . Changes of carbohydrates in pepper (Capsicum annuum L) flowers in relation to their abscission under different shading regimes . Annals of Botany , 78 : 163 – 168 .
- Aloni , B. , Karni , L. , Zaidman , Z. and Schaffer , A. A. 1997 . The relationship between sucrose supply, sucrose-cleaving enzymes and flower abortion in pepper . Annals of Botany , 79 : 601 – 605 .
- Arnon , D. I. 1949 . Copper enzymes in isolated chloroplast. Polyphenol oxidase in Beta vulgaris . Plant Physiology , 24 : 1 – 15 .
- Baghour , M. , Ruiz , J. M. and Romero , L. 2000 . Metabolism and efficiency in nitrogen utilization during senescence in pepper plants: Response to nitrogenous fertilization . Journal of Plant Nutrition , 23 : 91 – 101 .
- Bañuelos , G. S. and Pasakdee , S. 2002 . Effect of organic fertilizers on vegetable production . Biocycle , 43 : 63 – 63 .
- Bar-Tal , A. , Aloni , B. , Karni , L. , Oserovitz , J. , Hazan , A. , Itach , M. , Gantz , S. , Avidan , A. , Posalski , I. , Tratkovski , N. and Rosenberg , R. 2001 . Nitrogen nutrition of greenhouse pepper. I. Effects of nitrogen concentration and NO3:NH4 ratio on yield, fruit shape, and the incidence of blossom-end rot in relation to plant mineral composition . Hortscience , 36 : 1244 – 1251 .
- Chapin , F. S. , Walter , C. H. S. and Clarkson , D. T. 1988 . Growth response of barley and tomato to nitrogen stress and its control by abscisic acid, water relations and photosynthesis . Planta , 173 : 352 – 366 .
- Chapman , H. D. and Pratt , P. F. 1961 . Methods of analysis for soils, plant and waters , Division of Agricultural Sciences, University of California .
- Chen , Y. , Katan , J. , Gamliel , A. , Aviad , T. and Schnitzer , M. 2000 . Involvement of soluble organic matter in increased plant growth in solarized soils . Biology and Fertility of Soils , 32 : 28 – 34 .
- Clark , M. S. , Horwath , W. R. , Shennan , C. , Scow , K. M. , Lantni , W. T. and Ferris , H. 1999 . Nitrogen, weeds and water as yield-limiting factors in conventional, low-input, and organic tomato systems . Agriculture Ecosystems & Environment , 73 : 257 – 270 .
- de Groot , C. C. , van den Boogaard , R. , Marcelis , L. F. M. , Harbinson , J. and Lambers , H. 2003 . Contrasting effects of N and P deprivation on the regulation of photosynthesis in tomato plants in relation to feedback limitation . Journal of Experimental Botany , 54 : 1957 – 1967 .
- De León , L. , Lopez-Perez , J. A. , Rodriguez , A. , Casanova , D. , Arias , M. and Bello , A. 2001 . Management of Meloidogyne arenaria in protected crops of Swiss chard in Uruguay . Nematropica , 31 : 103 – 108 .
- Doorenbos , J. and Pruitt , W. O. 1977 . Irrigation and drainage , Rome : FAO .
- Fulkerson , W. J. and Donaghy , D. J. 2001 . Plant-soluble carbohydrate reserves and senescence-key criteria for developing an effective grazing management system for ryegrass-based pastures: A review . Australian Journal of Experimental Agriculture , 41 : 261 – 275 .
- Gao , Z. F. , Sagi , M. and Lips , H. 1996 . Assimilate allocation priority as affected by nitrogen compounds in the xylem sap of tomato . Plant Physiology and Biochemistry , 34 : 807 – 815 .
- Grindlay , D. J. C. 1997 . Towards an explanation of crop nitrogen demand based on the optimization of leaf nitrogen per unit leaf area . Journal of Agricultural Science , 128 ( 1997 ) : 377 – 396 .
- Haneklaus , S. , Hagel , I. , Paulsen , H. M. and Schnug , E. 2002 . Objectives of plant nutrition research in organic farming . Landbauforschung Volkenrode , 52 : 61 – 68 .
- Haraldsen , T. K. , Asdal , A. , Grasdalen , C. , Nesheim , L. and Ugland , T. N. 2000 . Nutrient balances and yields during conversion from conventional to organic cropping systems on silt loam and clay soils in Norway . Biological Agriculture & Horticulture , 17 : 229 – 246 .
- Hewitt , B. R. 1958 . Spectrophotometric determination of total carbohydrate . Nature , 182 : 246 – 247 .
- Isaac , R. A. and Johnson , W. C. 1976 . Determination of total nitrogen in plant tissue, using a block digester . Journal Association of Official Analytical Chemists , 59 : 98 – 100 .
- Keller , J. and Bliesner , R. D. 1990 . Sprinkle and trickle irrigation , New York : Van Nostrand Reinhold .
- López-Medina , J. , Lopez-Aranda , J. M. , Medina , J. J. , Miranda , L. and Flores , F. 2003 . Chemical and non-chemical alternatives to methyl bromide fumigation of soil for strawberry production . Journal of Horticultural Science and Biotechnology , 78 : 597 – 604 .
- Morley , P. S. , Hardgrave , M. , Bradley , M. and Pilveam , D. J. 1993 . “ Susceptibility of sweet pepper (Capsicum annuum L.) cultivars in the calcium deficiency disorder “blossom end rot.” . In Optimization of plant nutrition, , Edited by: Fragoso , M. A. C. and Van Beusichem , M. L. 561 – 567 . The Netherlands : Kluwer Academic Publishers .
- O'Sullivan , J. 1979 . Response of pepper to irrigation and nitrogen . Canadian Journal of Plant Science , 59 : 1085 – 1091 .
- Olsen , S. R. , Cole , C. V. , Watanabe , F. S. and Dean , L. A. 1954 . Estimation of available phosphorus in soils by extraction with sodium bicarbonate , 939 US Department of Agriculture Circular .
- Rhoades , J. D. 1982 . “ Soluble salts ” . In Methods of soil analysis: Part 2: Chemical and microbiological properties, , Edited by: Page , A. L. 167 – 179 . Madison, WI : ASA .
- Ullrich , W. R. 1992 . “ Transport of nitrate and ammonium through plant membranes ” . In Nitrogen Metabolism of Plants , Edited by: Mengel , K. and Pilbeam , D. J. 121 – 137 . Oxford : Clarendon Press .
- Winsor , G. and Adams , P. 1987 . Diagnosis of Mineral Disorders in Plants , UK : Glasshouse Crops Hardback .
- Zhen , R. G. and Leigh , R. A. 1990 . Nitrate accumulation by wheat (Triticum-aestivum) in relation to growth and tissue-N concentrations . Plant Soil , 124 : 157 – 160 .