FIELD: agriculture.
SUBSTANCE: invention relates to agriculture. For root feeding of grapes on sandy soils make the introduction of nitrogen, phosphate, potash using hydrodrills to the roots to a depth of 25-30 cm in the beginning phase of the sap flow, together with boric acid in the following ratio of active ingredient per hectare: N - 90 kg, phosphorus - 90 kg potassium - 90 kg of boric acid - 3 kg.
EFFECT: invention allows to increase yield.
1 cl, 2 tbl
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