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Exchange capacity of a substrate

Exchange capacity of a substrate

Gb + Gw, Gartnerborse und Gartenwelt 88(12): 507-509

Five pelargonium cultivars were grown in peat-based substrates containing different proportions of clay granules or Unicam A and given 2 doses of fertilizer. Unicam A had a higher exchange capacity (243 meq/100 g) than clay granules (16 meq/100 g). As the proportion of Unicam A in the substrate increased (6, 12, 18 kg/msuperscript 3), the fresh weight, diameter and height of the plants decreased. Fertilizer dose (0.8 or 1.6 g/litre of a 15N:11P2O5:15K2O fertilizer) did not affect fresh weight.

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Accession: 001831073

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