What is the yellow tip of the flag leaf of wheat?

Wheat yellow flag leaves are caused by insufficient soil fertility and irregular cultivation methods.

1, soil fertility is insufficient.

It shows that there are few secondary roots, few tillers, dark green leaves and yellow tips, which are expressed in the whole land, but not in other neighboring farmers' plots.

2. Farming and planting methods are not standard.

Poor quality of soil preparation before sowing, especially straw returning to field and rotary tillage, too deep sowing or too shallow layer of straw returning to field, led to poor root development, false inhibition during sowing, too shallow sowing, exposed tillering nodes, weak seedling field after sowing, few and short secondary roots when encountering plots without winter irrigation years ago, and poor root development. This shows that the same mechanical operation chart has the same symptoms.

Planting method of wheat

1, seed selection and soil preparation

Now the variety of wheat is not as single as before, so it can be screened. First of all, we should consider the local Qihoo and local soil conditions, and choose the most suitable varieties, such as those with strong drought resistance in less rainy areas, strong adaptability in poor soil areas, strong cold resistance in cold weather and strong disease resistance in rainy areas, and choose the best ones according to specific conditions.

In order to ensure the growth and yield of wheat, when preparing the soil, it is necessary to dig at least 30 cm deep into the soil layer, and to finely break the clods, fill up the field, then sprinkle 4,000 kg of farmyard manure, turn the field over again, stir the fertilizer evenly, and then build a small ditch every one meter to one and a half meters to prepare for irrigation and drainage. Finally, we can wait for sowing.

2, reasonable sowing

Before sowing, we usually need germination treatment and seed dressing. First, we soak the wheat seeds in water for two days, then take them out and put them into the medicine and stir them evenly. Let it stand for 20 minutes, then wash it with clear water, then wrap it in cotton cloth and hang it by the water. In about three days, the seeds will germinate, and then they can be planted.

There are several ways to sow seeds. The most common way is to drill holes, that is, to open a small ditch at intervals of 30 cm in each row on the whole land, then spread the seeds evenly in the ditch, and then cover the seeds with soil. Scattering is more common in rural areas, and it will be simpler. Just spread the planting evenly over the fields and then cover the seeds. Finally, a more detailed planting method is to drill a small hole with a spacing of 30 cm between each plant in each row and sprinkle three to five seeds in each small hole.