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- [27] VARIATION IN TOTAL NITROGEN-CONTENT IN PHYLLANTHUS-URINARIA LINN - AS INFLUENCED BY SOIL-NITROGEN COMPARATIVE PHYSIOLOGY AND ECOLOGY, 1978, 3 (02): : 79 - 80
- [28] THE RELATIONSHIPS BETWEEN MINERAL NITROGEN-CONTENT IN THE SOIL, YIELD AND SUGAR CONTENT IN SUGAR-BEET ROSTLINNA VYROBA, 1990, 36 (10): : 1041 - 1052
- [30] STUDIES OF CONSIDERING SOIL INORGANIC NITROGEN-CONTENT IN DIMENSIONING NITROGEN RATES FOR SUGAR-BEET ARCHIV FUR ACKER UND PFLANZENBAU UND BODENKUNDE-ARCHIVES OF AGRONOMY AND SOIL SCIENCE, 1986, 30 (03): : 157 - 162