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- [5] The relation of certain non-leguminous plants to the nitrate content of soils JOURNAL OF THE FRANKLIN INSTITUTE, 1911, 171 : 205 - 220
- [6] INFLUENCE OF PROCESSED SEWAGE SLUDGE ON NITROGEN CONTENT IN PLANTS AND SOILS ENVIRONMENT PROTECTION ENGINEERING, 2009, 35 (02): : 141 - 148
- [7] The relation of certain non-leguminous plants to the nitrate content of soils JOURNAL OF THE FRANKLIN INSTITUTE, 1911, 171 : 1 - 16
- [8] NITRATE CONTENT OF DIFFERENT PLANTS ANNALES DE LA NUTRITION ET DE L ALIMENTATION, 1980, 34 (5-6): : 909 - 914