There are two methods that can be used: 1. Under-membrane groove application. This method is a top dressing method used for ridge cultivation of vegetables. It has a small amount of water in a single ditch and even fertilization, so that the fertilizer directly into the root distribution layer of soil, conducive to vegetable absorption and utilization of nutrients. However, due to the small amount of water in the furrows and the short watering time, it is not appropriate to apply solid fertilizers directly. 2. Under the membrane, this method is a top-dressing method used for low-lying cultivation of vegetables. This method has a large amount of watering and a long time of watering. It can be used for direct fertilization of solid fertilizers, but the distribution of fertilizers on the surface is often uneven and the concentration of fertilizers is too high. When it is high, it is easy to cause damage to the root system, so it is necessary to grasp the appropriate concentration of fertilizer.
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