References
- Gardner , S.R. and Roth , R.L. 1989 . Midrib nitrate concentration as a means for determining nitrogen needs of broccoli . J. Plant Nutri. , 12 : 11 – 125 .
- Knowles , T.C. , Doerge , T.A. and Ottman , M.J. 1989 . Plant part selection and evaluation of factors affecting analysis and recovery of nitrate in irrigated Durum wheat tissue . Commun. Soil Sci. Plant Anal. , 20 : 607 – 622 .
- Wollring , J. and Kohler , J. 1989 . Der NO3‐Gehalt irn Pflanzenpresssaft als Massstab zur Beurteilung des N‐Ernahrungszustandes von Petunien . Gartenbauwissenschaft. , 54 : 274 – 278 .
- Wollring , J. and Wehrmann , J. 1990 . Der Nitratgehalt in der Halmbasis als Massstab fur den Stickstoffdungerbedart bei Wintergetreide . Z. Pflanzenemahr. Bodenk. , 153 : 47 – 53 .
- Ulrich , A. and Hills , F.J. 1990 . “ Plant analysis as an aid in fertilizing sugarbeet ” . In Soil Testing and Plant Analysis, , 3rd Edition , Number 3 SSS A Book Series Edited by: Westerman , R.L. 429 – 447 . Madison , WI : Soil Science Society of America, Inc. .
- Gardner , S.R. and Roth , R.L. 1990 . Midrib nitrate concentration as a means for determining nitrogen needs of cauliflower . J. Plant Nutri. , 13 : 1435 – 1451 .
- Homenauth , O.P. , McConnaughey , P.K. , Hairston , J.E. and Sanford , J.O. 1986 . Petiole and leaf nitrate studies in sunflower . Commun. Soil Sci. Plant Anal. , 17 : 1257 – 1269 .
- Oertli , J.J. 1985 . Magenkrebs, Nitrate, Gemusekonsum und Vitamine . Schweiz. Landw. Fo. , 25 : 1 – 13 .
- Blom‐Zandstra , M. and Lampe , J.E.M. 1985 . The role of nitrate in the osmoregulation of lettuce (Lactuca sativa L.) grown at different light intensities . J. Exper. Botany , 36 : 1043 – 1052 .
- Boon van der , J. , Steenhuizen , J.V. and Steingrover , E.G. 1990 . Growth and nitrate concentration of lettuce as affected by total nitrogen and chloride concentration, NH4/NO3 ratio and temperature of the recirculating nutrient solution . J. Hort. Sci. , 65 : 309 – 321 .
- Oertli , J.J. 1987 . Interactive Wirkung von Temperatur und Licht auf den Nitratgehalt von Gemusepflanzen . Schweiz. Landw. Fo. , 26 : 483 – 490 .
- Epstein , E. 1972 . Mineral Nutrition of Plants: Principles and Perspectives , New York , NY : John Wiley and Sons .
- Ulrich , A. , Hills , F.J. , Ririe , D. , George , A.G. and Morse , M.D. 1959 . Plant Analysis: A Guide for Sugar Beet Fertilization . California Agricultural Experiment Station Bulletin , : 766
- Geraldson , C.M. and Tyler , K.S. 1990 . “ Plant analysis as an aid in fertilizing vegetable crops ” . In Soil Testing and Plant Analysis, , 3rd Edition , Number 3 SSSA Book Series Edited by: Westerman , R.L. 549 – 562 . Madison , WI : Soil Science Society of America, Inc. .
- Danek‐Jezik , K. 1986 . Nitratvergleiche bei Treibsalatsorten in verschiedenen Entwicklungsstadien . Gartenbauwissenschaft. , 51 : 190 – 192 .
- Roorda van Eysinga , J.P.N.L. and Meijs , M.O. van der . 1985 . Effect of nitrogen nutrition and global radiation on yield and nitrate content of lettuce grown under glass . Commun. Soil Sci. Plant Anal. , 16 : 1293 – 1300 .