"This USDA website will not be updated during a lapse in federal funding. Content on this website will not be current or maintained until funding issues have been resolved. However, if there is information that affects security, life, and property, this website will continue to update that information during a funding lapse."

Home Publications Tree Planters' Notes Tree Planters' Notes Volume 23, Number 1 (1972) Field survival poor for stored and heeled-in ponderosa pine seedlings

Field survival poor for stored and heeled-in ponderosa pine seedlings

Several thousand 3-0 ponderosa pine seedlings of a Siskiyou National Forest seed source were erroneously lifted from nursery beds in mid-November 1968. Immediately after sorting, bundles of seedlings were wrapped in waterproof paper with moist peat and packed in polyethylene-lined kraft bags. After 5 and 16 weeks of cold storage, some were heeled in for 14 and 3 weeks, respectively, at the nursery. The rest were held in storage for 19 weeks. In the spring of 1969, field foresters, seeking information concerning the quality of both the heeled-in and stored seedlings, asked reforestation specialists (including the author) to examine them. We recommended that all seedlings stored longer than 5 weeks be discarded and that those heeled-in after 5 weeks' storage be re-sorted before shipment. A limited study was established to test the validity of this recommendation and to gain more insight into extended storage and heeling in of ponderosa pine seedlings.

Download this file:

PDF document Download this file — PDF document, 63Kb


Author(s): James W. Edgren

Publication: Tree Planters' Notes - Volumes 23, Number 1 (1972)

Volume: 23

Number: 1

Personal tools