Table 4. Concentrations of P, K, Mg, and Ca in leaves of whole crowns of chlorotic pin oaks with and without necrotic leaf spots.

	% P			% K			% Mg			% Ca
	June	July	August	June	July	August	June	July	August	June	July	August
Trees with spots	0.20	0.14	0.15	0.96	0.88	0.89	0.21	0.23	0.30	0.40	0.45	0.57
Trees with-out sport	0.19	9.13	0.14	0.89	0.78	0.80	0.19	0.21	0.23	0.35	0.40	0.46
Statistical significance	NS	NS	NS	NS	NS	NS	NS	0.05	0.01	NS	NS	NS

n, trees with spots: 28 (June), 25 (July), 30 (August)
n, trees without spots: 19 (June), 17 (July), 14 (Agusut)