Table 3, Critical Values, Adequate Ranges, High Values, and Toxicity Values for Plant Nutrient Content

Table 3. Critical (deficiency) values, adequate ranges, high values, and toxicity values for plant nutrient content for the most recently maturedwhole leaf plus petiole in tomato [1].

-		%					ppm
Time of Sampling	Status	N	P	K	Ca	Mg	S	Fe	Mn	Zn	B	Cu	Mo
5-Leaf Stage	Deficient	<3.0	0.30	3.0	1.0	0.30	0.30	40	30	25	20	5	0.2
	Adequate Range	3.0	0.30	3.0	1.0	0.30	0.30	40	30	25	20	5	0.2
	Adequate Range	5.0	0.60	5.0	2.0	0.50	0.80	100	100	40	40	15	0.6
	High	>5.0	0.60	5.0	2.0	0.50	0.80	100	100	40	40	15	0.6
First Flower	Deficient	<2.8	0.20	2.5	1.0	0.30	0.30	40	30	25	20	5	0.2
	Adequate Range	2.8	0.20	2.5	1.0	0.30	0.30	40	30	25	20	5	0.2
	Adequate Range	4.0	0.40	4.0	2.0	0.50	0.80	100	100	40	40	15	0.6
	High	>4.0	0.40	4.0	2.0	0.50	0.80	100	100	40	40	15	0.6
	Toxic (>)	--	--	--	--	--	--	--	1500	300	250	--	--
Early Fruit Set	Deficient	<2.5	0.20	2.5	1.0	0.25	0.30	40	30	20	20	5	0.2
	Adequate Range	2.5	0.20	2.5	1.0	0.25	0.30	40	30	20	20	5	0.2
	Adequate Range	4.0	0.40	4.0	2.0	0.50	0.60	100	100	40	40	10	0.6
	High	>4.0	0.40	4.0	2.0	0.50	0.60	100	100	40	40	10	0.6
	Toxic (>)	--	--	--	--	--	--	--	--	--	250	--	--
First Ripe Fruit	Deficient	<2.0	0.20	2.0	1.0	0.25	0.30	40	30	20	20	5	0.2
	Adequate Range	2.0	0.20	2.0	1.0	0.25	0.30	40	30	20	20	5	0.2
	Adequate Range	3.5	0.40	4.0	2.0	0.50	0.60	100	100	40	40	10	0.6
	High	3.5	0.40	4.0	2.0	0.50	0.60	100	100	40	40	10	0.6
During Harvest Period	Deficient	<2.0	0.20	1.5	1.0	0.25	0.30	40	30	20	20	5	0.2
	Adequate Range	2.0	0.20	1.5	1.0	0.25	0.30	40	30	20	20	5	0.2
	Adequate Range	3.0	0.40	2.5	2.0	0.50	0.60	100	100	40	40	10	0.6
	High	3.0	0.40	2.5	2.0	0.50	0.60	100	100	40	40	10	0.6

[1] Adapted from G. Hochmuth, D. Maynard, C. Vavrina, and E. Hanon, Plant Tissue Analysis and Interpretation for Vegetable Crops in Florida, Fla. Coop. Ext. Serv. Special Series SSVEC-42, 1991.

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