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.

Nitrogen deficiency (needle chlorosis) in white spruce planted in poorly-drained old field sandy loams. Larose Forest, Limerick

Nitrogen fertilization trial A-60-N1, control on left, 100k/ha on right. White spruce, 2+0, fertilization trials.

Nitrogen fertilization trial N @ 300lb/ac as ammonium sulphate, one of the first such trials in Ontario. White spruce, 1+0, fertilization.