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- [1] SINGLE AND COMBINING EFFECTS OF SOWING DATE, NITROGEN FERTILIZING AND GROWTH-REGULATORS ON CULM STABILITY AND YIELD FORMATION IN WINTER RYE .2. EFFECT ON YIELD COMPONENTS AND GRAIN-YIELD ARCHIV FUR ACKER UND PFLANZENBAU UND BODENKUNDE-ARCHIVES OF AGRONOMY AND SOIL SCIENCE, 1987, 31 (12): : 749 - 754