Table 151

Tissue Analysis Values Useful in Indicating Zinc Status

Conditions of Sampling

Concentration of Zinc in Dry Matter (mg kg 1)

Plant

Asparagus (Asparagus officinalis L.) Azalea (Rhododendron indicum Sweet) Barley (Hordeum vulgare L.)

Alfalfa (Medicago sativa L.) Almond (Prunus dulcis D.A. Webb) Apple (Malus spp.) Apricot (Prunus armeniaca L.) Avocado (Persea americana Mill.) Clover, subterranean (Trifolium subterraneum L.) Beans

(Phaseolus vulgaris L.)

Beans

Beans

Beans

Beet (Beta vulgaris L.)

Blueberry, High bush (Vaccinium corymbosum L.)

Type of Culture

Field

Soil

Soil

Field Field

Field Field

Field

Solution

Field

Field Field Field Field

Field

Tissue Age, Stage, Condition

Sampled or Date of Sample

Spears at harvest time

Leaves Leaves

Leaves

Tops

Mature leaf blade

Leaflets

Pods

Seed

Youngest mature leaf +

petiole

Leaves

Showing

Deficiency Low Symptoms Range

Data bank Flowering—

youngest mature leaf WS Above ground portion at emergence of head at boot stage Tops 12 weeks old

Leaves (t) Midshoots

Apical 6 to 8 in (S eptember-October) Mature

12 weeks old

Various ages

Peak harvest Peak harvest Seed harvest Mature

From 6th node from tip

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