Table 5 Table A2. Leaf tissue nutrient analyses of three apple production systems. Differences between values in a year followed by different letters are significant at the 0.05 level (LSD).

Nutrient	Year	Organic	Conventional	Integrated
Nitrogen (%)	1995	2.57 a	2.63 a	2.64 a
	1996	2.41 a	2.42 a	2.66 b
	1997	2.86 a	2.94 a	2.92 a
	1998	2.25 a	2.37 a	2.34 a
	1999	2.23 a	2.36 a	2.38 a
Phosphorus (%)	1995	0.25 a	0.24 a	0.24 a
	1996	0.21 a	0.18 b	0.19 ab
	1997	0.18 a	0.19 a	0.20 a
	1998	0.16 a	0.16 a	0.16 a
	1999	0.21 a	0.18 b	0.17 ab
Potassium (%)	1995	1.95 a	2.03 b	1.95 a
	1996	2.23 a	2.00 a	2.08 a
	1997	1.25 a	1.38 a	1.58 b
	1998	1.40 a	1.73 b	1.75 b
	1999	1.83 a	1.85 a	1.90 a
Sulphur (%)	1995	0.21 a	0.23 a	0.24 a
	1996	0.19 a	0.21 a	0.20 a
	1997	0.17 a	0.17 a	0.16 a
	1998	0.11 a	0.11 a	0.12 a
	1999	0.15 a	0.16 a	0.14 a
Calcium (%)	1995	1.62 a	1.71 a	1.62 a
	1996	1.68 a	1.84 b	1.69 a
	1997	1.74 a	1.73 a	1.68 a
	1998	1.70 a	2.09 a	1.93 a
	1999	1.83 a	1.86 a	1.87 a
Magnesium (%)	1995	0.32 a	0.35 b	0.35 b
	1996	0.37 a	0.38 a	0.37 a
	1997	0.34 a	0.31 b	0.32 b
	1998	0.38 a	0.41 a	0.40 a
	1999	0.34 a	0.31 a	0.33 a
Boron (ppm)	1995	22.75 a	24.50 ab	25.25 b
	1996	21.50 a	26.00 b	22.25 a
	1997	27.75 a	25.75 a	26.25 a
	1998	20.50 a	23.00 a	20.50 a
	1999	18.75 a	17.75 a	17.50 a
Zinc (ppm)	1995	11.75 a	13.25 ab	14.50 b
	1996	15.75 a	25.25 b	14.50 a
	1997	10.75 a	12.75 a	12.00 a
	1998	10.75 a	13.00 b	12.50 b
	1999	14.25 a	15.00 a	14.75 a
Manganese (ppm)	1995	51.00 a	59.25 a	58.75 a
	1996	51.75 a	58.75 b	56.25 ab
	1997	61.75 a	60.75 a	58.75 a
	1998	61.50 a	59.00 a	63.75 a
	1999	47.75 a	46.25 a	50.25 a
Copper (ppm)	1995	9.00 a	8.75 a	8.75 a
	1996	9.50 a	10.25 a	9.25 a
	1997	8.50 a	8.25 a	8.00 a
	1998	8.50 a	8.00 a	8.25 a
	1999	8.50 a	8.50 a	9.00 a
Iron (ppm)	1995	188.00 a	138.75 ab	122.50 b
	1996	281.75 a	354.75 a	247.50 a
	1997	159.00 a	135.75 ab	116.25 b
	1998	190.75 a	172.50 a	188.75 a
	1999	315.50 a	259.25 a	296.50 a

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