Effect of precision sowing on growth of Pinus radiata seedlings at Edendale Nursery.

Authors: J. M. Balneaves
Publication: New Zealand Journal of Forestry, Volume N.Z.J.For. 1983, Issue N.Z.J.For. 28(1) 1983, pp 93-99, May 1983
Publisher: New Zealand Institute of Forestry

---

Abstract: Seed was precision sown at 4, 6, and 8 cm spacing in drills 15 cm apart and seedlings raised as 1/0 planting stock.

There was a marked difference in quality of seedlings from each spacing. Those seedlings raised at 4 cm spacing had a higher percentage of culls (31%) than those raised at 6 and Sem spacing (6 and 7%, respectively).

Growth response following planting-out indicated that those seedlings raised at 6 and 8 cm spacing grew more vigorously (as measured by root growth potential, stem height and diameter growth, bulk index, and oven dry weight) than those seedlings which had been raised at 4 cm spacing. Recommended In-drill spacing for seedlings to be planted on benign or well cultivated sites should be not less than 6 cm. Seedlings to be established on harsher inland sites may need to be raised at wider in-drill spacings but this needs further elucidation.

---