. Effects of mineral levels on physiology and morphology of plants. Plant physiology; Plants, Effect of minerals on. 74 % GERMINATION lOOh 90 80 70 60 50 40 30 ?-0 10 0 PRETREATMENT BORON. 25ppm /62ppm 7 14 DAYS ai Figure 19. -- Effect of pretreatment of boric acid on percent germination of Portulaca oleracea Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Brolmann, Johannes Bernardus Balthasar, 1920-.

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