The areas where fertilizer balls are used for breeding should be selected as the leeward sunny areas, and attention should be paid to key technical measures such as removing the membrane, cooling the membrane, watering the membrane and timely hardening the seedlings. In order to popularize corn mulching in high-elevation corn production areas, it is necessary to improve the coverage of mulching film, increase the density of transplants appropriately, ensure that the insulation measures are in place, and improve the ability to resist the hazards of low-temperature freezing in early spring. In the western, central and southeastern areas, the gutters should be drained in time after the main flood season or continuous rain. During the flood season from May to June, we must increase the preparation for flood control and flood resistance. In particular, if there is a torrential rain and other disasters in the valley, if there is any lodging, we should manually lift up and firmly hold the soil, and pay attention to removing the silt.
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