Nisula roll stock grown experimentally. White spruce, 1+1, container stock.

Nisula roll white spruce, put in roll in April, photo in June. White spruce, 2+0, container, nisula.

Nisula rolls in Sussex nursery of J.D. Irving. White spruce, 1+1, container, nisula.

Shore at Nitmat Lake, BC

Shore view at Nitmat Lake

Change in nitrogen mg (weight) in white spruce seedlings after drying

Nitrogen chlorosis in production beds. White spruce, 2+1, nutrient deficiency.

Nitrogen chlorosis showing as a "dished bed" in seedbeds. White spruce, 2+0, nutrient deficiency-nitrogen.

Nitrogen cycling in Pinus taeda (Loblolly pine).

Nitrogen deficiency in Norway spruce planted 1967, 6 years. Razès.