Nutrient deficiency symptoms in woody nursery plants

Penningsfeld, F.

Phosphorsaure 24: 3/4, 199-212


Accession: 014580623

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Germination tests and trials with seedlings of conifers, deciduous trees and rhododendrons, in limed and fertilized peat, were conducted over a period of 5 years. A light, permeable, carbonate-free humus soil is recommended and the pH preferences of different trees are listed. On average, the most satisfactory pH levels were 4.5-5 in peat, 5-5.5 in light humus, and 5.5-6.5 in heavier soils. Nutrient contents below 9 mg. P2O5 and 12 mg. K2O per 100 g. soil were inadequate. Levels of 10-20 mg.