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Home → Publications → Tree Planters' Notes → Tree Planters' Notes Volume 25, Number 2 (1974) → Urea fertilizer toxic to young jack pine seedlings

Urea fertilizer toxic to young jack pine seedlings

Two greenhouse experiments were performed at the Great Lakes Forest Research Centre to evaluate the effects of urea fertilizer on 1-nlonthold jack pine seedlings. In the first. urea was surface applied ire pellet or solution form at fire replicated rates to a sandy soil ire pots containing I (1 seedlings per pot. Seedl. ing mortality increased as the rate of nitrogen increased. with all seedlings dying at the 600 kg N/ha treatment level. In the second experiment. urea pellets were placed net the soil surface beside seedling sterns and at prescribed distances, and high mortality resulted when even one pellet was placed closer than 0.6 cm.


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Author(s): D. A. Winston

Publication: Tree Planters' Notes - Volume 25, Number 2 (1974)

Volume: 25

Number: 2