REFERENCES
- Abadía , J. and Abadía , A. 1993 . “ Iron and plant pigments ” . In Iron Chelation in Plants and Soil Microorganisms , Edited by: Barton , L. L. and Hemming , B. C. 327 – 344 . San Diego : Academic Press .
- Alvarez-Fernández , A. , García-Laviña , P. , Fidalgo , C. , Abadía , J. and Abadía , A. 2004 . Foliar fertilization to control iron chlorosis in pear (Pyrus communis L.) trees . Plant and Soil , 263 : 5 – 15 .
- Bauerle , W. L. , Weston , D. J. , Bowden , J. D. , Dudley , J. B. and Toler , J. E. 2004 . Leaf absorptance of photosynthetically active radiation in relation to chlorophyll meter estimates among woody plant species . Sciencia Horticulturae , 101 : 169 – 178 .
- Belkhodja , R. , Morales , F. , Sanz , M. , Abadía , A. and Abadía , J. 1998 . Iron deficiency in peach trees: Effects on leaf chlorophyll and nutrient concentrations in flowers and leaves . Plant and Soil , 203 : 257 – 268 .
- Cavaco , M. , Jordão , P. and de Sousa , R. 2006 . Produção Integrada da Cultura de Pomóideas [Integrated Fruit Production for Pome Trees] , Oeiras, , Portugal : MADRP/DGPC .
- Correia , M. F. O. P. 2001 . “ Caracterização fisiológica e nutritiva da clorose férrica em citrinos—Avaliação dos mecanismos de resistência aos efeitos do HCO3 − [Physiological and nutritional characterization of iron chlorosis in citrus—Assessment of the mechanisms underlying the tolerence to HCO3 effects] ” . Faro, , Portugal : PhD thesis, Universidade do Algarve .
- Fallahi , E. , Colt , W. M. , Fallahi , B. and Chun , I.-J. 2001 . Influence of different rates of nitrogen on fruit quality, yield and photosynthesis of ‘Fuji’ apple . Acta Horticulturae , 564 : 261 – 268 .
- FAO-ISRIC-ISSS . 1998 . World Reference Base for Soil Resources , World Soil Resources Reports, 84 Available at: http://www.fao.org/docrep/W8594E/W8594E00.htm. Accessed 17 November 2010
- Khemira , H. , Sugar , D. and Righetti , T. L. 1994 . Relationship between chromaticity values and nitrogen content of pear leaves . Acta Horticulturae , 367 : 305 – 308 .
- Lichtentaller , H. K. 1987 . “ Chlorophylls and carotenoids: Pigments of photosynthetic biomembranes ” . In Methods in Enzymology , Edited by: Douce , R. and Packer , L. Vol. 148 , 350 – 382 . New York : Academic Press .
- López , S. , Guevara , E. , Maturano , M. , Melaj , M. , Bonetto , J. P. , Meira , S. , Martin , O. and Bárbaro , N. 2001 . Absorcion de nitrogeno en trigo en relacion con la disponibilidad hidrica [Influence of water availability in nitrogen uptake in wheat] . Terra , 20 : 7 – 15 .
- Menino , M. R. 2005 . “ Eficiência de utilização do azoto em jovens laranjeiras ‘Lane Late’ enxertadas em citranjeira ‘Carrizo’ na campina de faro [Nitrogen uptake efficiency of young ‘Lane Late’ orange trees grafted in ‘Citranjeira Carrizo’ in Faro] ” . Lisbon, , Portugal : PhD thesis, Instituto Superior de Agronomia/Technical University of Lisbon .
- Neilsen , D. , Hogue , E. J. , Herbert , L. C. , Parchomchuk , P. and Neilsen , G. H. 1995 . Use of rapid techniques for estimating the N status of fertigated apple trees . Acta Horticulturae , 383 : 211 – 218 .
- Netto , A. T. , Campostrini , E. and Bressan-Smith , S. E. 2005 . Photosynthetic pigments, nitrogen, chlorophyll fluorescence and SPAD-502 readings in coffee leaves . Scientia Horticulturae , 104 : 199 – 209 .
- Netto , A. T. , Campostrini , E. , de Oliveira , J. G. and Yamanishi , O. K. 2002 . Portable chlorophyll meter for the quantification of photosynthetic pigments, nitrogen and the possible use for assessment of the photochemical process in Carica papaya L . Brazilian Journal of Plant Physiology , 14 : 203 – 210 .
- Peryea , F. J. and Kammereck , R. 1997 . Use of Minolta SPAD-502 chlorophyll meter to quantify the effectiveness of mid-summer trunk injections of iron on chlorotic pear trees . Journal of Plant Nutrition , 20 : 1457 – 1463 .
- Pestana , M. , de Varennes , A. and Faria , E. 2003 . Diagnosis and correction of iron chlorosis in fruit trees: A review . Food, Agriculture & Environment , 1 : 46 – 51 .
- Porro , D. , Dorigatti , C. , Stefanini , M. and Ceschini , A. 2001 . Use of SPAD meter in diagnosis of nutritional status in apple and grapevine . Acta Horticulturae , 564 : 243 – 252 .
- Rosati , A. , Sparza , G. , DeJong , T. M. and Pearcy , R. W. 1999 . Influence of canopy light environment and nitrogen availability on leaf photosynthetic characteristics and photosynthetic nitrogen-use efficiency of field-grown nectarine trees . Tree Physiology , 19 : 173 – 180 .
- Rufat , J. , Del campo , J. , Mata , M. , Arbonés , A. , Gelly , M. , Marsal , J. and Arbonés , G. M. 2004 . “ Respuesta del manzano Golden a diferentes dosis de abonado nitrogenado. Resultados de tres años [Response of Golden apple to different rates of nitrogen fertilizer. Three-years results] ” . In Nutrição Mineral. Causas e Consequências da Dependência da Fertilização [Mineral Nutrition. Causes and consequences of fertilization addiction] , Edited by: Martins-Loução , M. A. and Cruz , C. 163 – 168 . Lisbon : FCUL .
- Sanchez , E. E. , Khemira , H. , Sugar , D. and Righetti , T. L. 1995 . “ Nitrogen management in orchards ” . In Nitrogen Fertilization in the Environment , Edited by: Bacon , P. E. 327 – 351 . New York : Marcel Dekker, Inc .
- Šesták , Z. , Čatský , J. and Jarvis , P. G. 1971 . Plant Photosynthetic Production—Manual of Methods , The Hague : Dr. W. Junk, N. V. Publishers .
- Shi , Y. and Byrne , D. H. 1995 . Tolerance of Prunus rootstock to potassium carbonate-induced chlorosis . Journal of the American Society for Horticultural Science , 120 : 283 – 285 .
- Swiader , J. M. and Moore , A. 2002 . SPAD-chlorophyll response to nitrogen fertilization and evaluation of nitrogen status in dryland and irrigated pumpkins . Journal of Plant Nutrition , 25 : 1089 – 1100 .
- Taiz , L. and Zeiger , E. 1998 . Plant Physiology , Sunderland, MA : Sinauer Associates .