First, partial application of nitrogen fertilizer. Partial application of nitrogen fertilizer will cause the tree's vigor to become weak and flourish, and only grow branches without bearing fruit. In addition, some fruit growers apply unripe farmyard manure into the orchard, causing the pear trees to grow tall, but they only bloom but do not bear fruit. Second, the drainage is not smooth. During the flowering period of pear trees, there is usually too much rain, and the accumulation of water in the orchard will frustrate the growth of the tree, resulting in fewer fruits; third, the lack of pollination trees. Pear trees are cross-pollinated plants, and the pollination rate within the variety is low.
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