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People observing a potassium deficient red pine plot
Sven Heiberg's original potassium deficient red pine plot. See Heiberg & Loewenstein, 1958 and Heiberg and White 1951. Pack Forest Warrensburg NY
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Norway spruce suffering from potassium deficiency
32 yearr old Norway spruce suffering from potassium deficiency. Pack Forest, Warrensburg NY. Person is Professor Ed White of SUNY.
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Norway spruce suffering from potassium deficiency (image 2)
32 yr old Norway spruce suffering from potassium deficiency. Pack Forest, Warrensburg NY. Person is Professor Ed White of SUNY.
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Potassium deficient red pine
Potassium deficient red pine. Ed White's experiment. N.B. sweep of stems which Ed says is symptomatic of the potassium deficiency. Pack Forest. Warrensburg NY.
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Irrigation experiment, NY. in red pines at Pack Forest
Irrigation experiment in red pines at Pack Forest, Warrensburg
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Dr. Al Leaf of SUNY describes his study on red pine roots at Pack Forest.
Dr. Al Leaf of SUNY, (Syracuse) describing his study on red pine roots, Pack Forest, Warrensburg
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On-site demonstration of red pine study by SUNY professor
Dr. Al Leaf of SUNY, Syracuse describing his study on red pine roots, Pack Forest, Warrensburg
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Red pine killed by forest pest
Red pine killed by Fomes annosus. Pack Forest, Warrensburg.
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Semimature needle blight in white pine
Semimature needle blight in white pine. Parry Sound, Georgian Bay.
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View on semimature needle blight on white pine.
Semimature needle blight on white pine. Parry Sound, Georgian Bay.
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