2. Do deep fertilization. Corn topdressing must be deep, otherwise it will reduce fertilizer utilization. The most suitable depth is 5 to 10 centimeters and timely soiling. 3. Look for growing fertilizer. The uneven plots of seedlings should be discriminated against strong seedlings and weak seedlings when top dressing. Weak seedlings should be topdressed as early as possible, if necessary, can be sprayed foliar fertilizer alone to promote the early weakness of weak seedlings; strong seed dressing time appropriate delay. 4. Appropriate amount of potassium fertilizer. When the amount of potassium in the base fertilizer is insufficient, suitable amount of potash fertilizer can be allocated to make up for the shortage of potassium. 5. Reasonable application of foliar fertilizer. Foliar spraying frequency, spraying period and solution concentration should be used strictly according to product instructions. Spray time should be selected before 10 o'clock in the morning or after 3 o'clock in the afternoon, you can also choose to spray on a cloudy day, avoid high temperature direct sunlight when working; spray evenly on the back of the blade, with droplets do not drip as well; Within 3 hours after spraying, in case of heavy rain, it is necessary to re-spray; foliar fertilizer is not mixed with pesticides as much as possible.
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1. Mechanical locks do not require batteries
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Corn field fertilizer considerations
1. Reasonably determine topdressing time. If you recover three times fertilizer, corn seedlings should not be topped prematurely, 5 to 6 leaves are appropriate to make seedlings thick and strong; jointing fertilizer is generally 10 to 11 leaves is appropriate, mechanical operations can be appropriate in advance to avoid agricultural machinery Injury seedlings; panicle fertilizer should pay attention to the amount of nitrogen fertilizer to prevent greediness; if chasing a fat, should be to pull out joint fertilizer.