Abstract
Attempts to raise poplar plantation were successfully made on partially reclaimed sodic lands of northern India. The silvicultural practices for poplar plantation on marginal soils beyond its established geographical limits were investigated between 1985 and 1995. The investigations included trials for evaluation of suitable clones, optimum spacing, irrigation and fertilizer requirement and inter-cropping studies. The performance of indigenous poplar clones was better than exotic clones. The spacing of 5×4 m (wider in North–South) produced the highest volume. Irrigation was very critical in summer months and 12–14 irrigations per year were required for good growth of trees. Poplars responded to application of nitrogen (160 kg ha −1) and phosphorus (100 kg ha −1) fertilizers. Inter-cropping with German chamomile resulted in maximum net return and wheat produced the highest increment in poplar diameter.
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