A Red Pine Case History: Development of the Rockland Plantation From 1914 to 1986
Growth data are presented for a 72-year-old plantation of red pine (Pinus resinosa Ait.) at Rockland, Ontario, part of which was thinned four times between 1938 and 1972 and part of which was left unthinned. Height growth in both parts ceased between stand ages 67 and 72 years. During the same 5-year period, gross periodic increment was 551 ft3/ac (38.6 m3/ha) in the thinned stand while in the unthinned stand mortality exceeded gross periodic increment by 187 ft3/ac (13.1 m3/ha).