Abstract
Effects of N and K levels and methods of N application to Robinia pseudoacacia seedlings were studied under nursery conditions. For N levels (15, 30, 45 and 60 kg per ha); two application methods (full dose at pricking-out; two equal splits); and two K levels (20 ^ 40 kg per ha) with a common control were tested in a randomized block design. 30 kg N applied in two equal splits (half at planting and half one month later) and 20 kg K per ha produced maximum biomass yield of stem, leaf, root, number of nodules per plant and total biomass.
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