. Botanical gazette. Plants. Fig. 17.—P. pumila, 3 months' seedlings grown in pots: a, irrigated with rain water; b, with Knop's solution; c, grown in rotted barnyard naanure and humus. were located at a distance of 5-10 cm. from large lateral roots near a portion of the root practically without secondary laterals. The cups were filled about 3 times a week with Knop's solution and were dug up after 2 months. In every case there was a marked development of laterals in the zone of diffusion of the solution. This was tried with Prunus pumila and with Thuja occidentalis (figs. 15, 16). The con
. Botanical gazette. Plants. Fig. 17.—P. pumila, 3 months' seedlings grown in pots: a, irrigated with rain water; b, with Knop's solution; c, grown in rotted barnyard naanure and humus. were located at a distance of 5-10 cm. from large lateral roots near a portion of the root practically without secondary laterals. The cups were filled about 3 times a week with Knop's solution and were dug up after 2 months. In every case there was a marked development of laterals in the zone of diffusion of the solution. This was tried with Prunus pumila and with Thuja occidentalis (figs. 15, 16). The contrast between the old bunched roots and the new slender ones is striking. Controls with distilled water showed no abnormal 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 Hanover, Ind. : J. M. Coulter
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Keywords: ., bookcollectionbiodiversity, bookcollectionnyb, booksubjectplants
