I. Analysis of the causes of yellow wheat seedlings 1. Deep sowing, resulting in "deep seed" wheat seedlings. Occurs on dry slopes, sandy lands, and aircraft sowing sites. Appropriate sowing depth of wheat is 3 to 5 cm, sowing is too deep, the lower part of the plant is hypoxic, the wheat seedlings are thin and weak, the tillering is significantly reduced, and even if no tiller is produced, a single seedling is formed. Before the new tillers form and issue secondary roots, the lower root system is deprived of oxygen, and it is difficult to absorb nutrients. The wheat seedlings are dehydrated and yellow. 2. Seeding is too shallow, causing "floating seeds" to become yellow. Occurred in paddy fields and poorly prepared wheat fields. When the wheat is sown in shallow conditions, when the drought occurs, the tillering section is in the dry soil layer, and the secondary roots occur less frequently. At the same time, the tillering festival is too high or exposed, and it is prone to produce freezing damage, causing yellowing of the wheat seedling tip. 3. Toxic gas damage, causing yellow wheat seedlings. Occurred in the return of straw, the application of unfamiliar farmyard manure, weeds and more abandoned land. Due to the uneven plowing of the plots, the wheat roots were overheated and the wheat seedlings grew poorly. During the later stages of farmland manure, toxic gases were released, damaging the young roots and causing yellowing of the wheat seedlings. 4. The poor quality of the site preparation caused yellow wheat seedlings. Occurrence of high humidity in the field when sowing. When planting, the humidity in the field was large, and the soil was turned upside down. After sowing, the seeds were not implemented, and the emergence was slow. The wheat root was overhead, and the wheat seedlings were yellow. 5. Waterlogging caused yellowing of wheat seedlings. Occurred in paddy fields and low-lying fields. The suitable soil moisture for the growth of wheat roots is 60%~70%, and the water content is too high, which can easily lead to the lack of oxygen in the root system. After the absorption of nutrients is delayed, the wheat seedlings are dehydrated and yellowed. 6. The sowing density is high and yellow seeds appear from the seed. Seeding is too dense and the single plant nutrient area is small, which often leads to the absence of a childbirth and forms an empty joint phenomenon. It is also easy to grow long wheat seedlings, lack of fat and water shortages. Second, remedial measures 1. Ditching support. For wheat fields with high groundwater level and low topography, good tri-grooves should be used: Weigou, Yaogou and Xianggou. Do the same three channels, stains can row, drought can irrigation. It is generally required to have a groove width of 20 cm, a groove depth of 33 cm, a waist groove depth of 26 cm, and a ditch depth of 20 cm. The soil cleared by the ditch can be broken and plucked around the roots of wheat to fill in gaps to increase the soil temperature so that the tillering festival can be maintained at a suitable depth under the soil to protect the wheat seedlings from wintering safely. 2. Dressing up strong. For wheat fields sown early, densely clustered and thinly grown, 5 to 7.5 kilograms of fast-acting fertilizer is applied per 667 square meters (1 acre) in combination with the middle plough to promote rejuvenation of wheat seedlings. 3. Rilled soil. The cultivating of wheat fields can not only eliminate weeds, remove dense seedlings and loosen the soil, but also can reduce ground evaporation, increase ground temperature, promote soil nutrient release, and facilitate the growth of roots and tillers. 4. Suppress the crushing. For wheat fields with poor soil preparation and poor soil preparation, the crushed soil blocks can be crushed by pressing, compacting the buckwheat noodles and bridging the earth seams, so that the roots of the wheat seedlings are solid, and the control is promoted. This will help preserve fertilizer, preserve water, keep warm, and prevent freezing. Promotes low tiller and root development, and promotes strong wheat seedlings. Blood Sugar Meter,Sugar Check Machine,Fasting Glucose Test,Glucose Monitoring Device Wuxi BioHermes Bio & Medical Technology Co., Ltd. , https://www.biohermesglobal.com