Early and mid-maturing grapes can be applied after harvesting, late-maturing grapes can be applied before harvesting, and late at the end of October. This method of spreading is commonly used in the old vineyards. It is to spread the base fertilizer between the rows of grapes and plow it. The advantage of this method is that it saves time and labor, and the fertilizer is widely spread; the disadvantage is that the fertilizer is too shallow and the amount of fertilizer needs to be increased.
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Grooves are generally applied along the planting line. If the basal fertiliser is applied for the first time after planting, a groove 30 cm wide and 60 cm deep can be opened along the planting furrow. When the ditch is opened, the topsoil and raw soil are opened. Before fertilizing, backfill a layer (about 10 cm) of topsoil, apply base fertilizer, and fill the topsoil. Then, the soil and the fertilizer are stirred again, and finally, the raw soil is backfilled into the ditch, and the remaining soil is used as a hoe for easy watering.