FERTILISER GUIDELINES FOR THE WINE INDUSTRY

TABLE 5. Minimum micro-nutrient concentrations in soils with pH KC values of between 5.0 to 6.5.

B

Mn 2.0

Zn

Cu 0.5

0.3

0.5

If deficiencies of micronutrients do occur, foliar nutrition is a simple solution. Table 6 can be used as a guideline to determine whether the status of the various micro-elements are satisfactory. TABLE 6: Micro-element concentrations in petioles, at fruit set, for assessing the nutrient status of vineyards (mg/kg). Micro-elements Deficiencies Sufficient High to excessive Fe *NA 30-180 *NA Cu <3 5-10 25-50 Zn <15 25-150 *NA Mn <20 30-60 >300 B <25 30-70 >100 Mo *NA 0.2-0.4 *NA

3

*NA – not available.

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