From late August to early October, sweet potato root expansion is planted for spring and summer. This period is the critical period for the formation of yield, and it is the period when the need for fertilizer is greatest. Timely application of swelling fertilizer, has a significant role in increasing production.
After applying the cracked sweet potato sweet potato block into the expansion period, it should pay close attention to cracking fertilizer. On the one hand, it can meet the nutrients needed for tuber enlargement and promote the expansion of tuberous roots; on the other hand, it can prevent premature aging of stems and leaves, enhance photosynthesis and increase nutrient accumulation. According to experiments, sweet potato can be increased by about 30% after applying cracking fertilizer. The time for sweet potato to apply cracking fertilizer is generally performed when there is a crack in the surface. Specific should be based on the growth of sweet potato and soil conditions. For example, if the previous crops are underfertilized, the soil is thin and the plant growth is poor, the plots can be applied as early as possible. The amount of topdressing fertilizer per acre can be 800 to 1,000 kilograms of human or animal manure, or 6 to 7 kilograms of urea. 600 kg, Shun crack application. If there is sufficient fertilizer in the early stage and the plant grows vigorously, you can use less fertilizer or potassium fertilizer and no nitrogen fertilizer. Immediately after topdressing, soil is cultivated. The soil in the trenches is broken and ploughed into the cracks on the surface.
Foliar spraying of sweet potato into the late growth stage, the root absorption capacity weakened, can be classified as foliar spray fertilizer. 0.5% urea solution may be sprayed on weak hilly slopes, plain sands, or fields with premature aging; 0.2% potassium dihydrogen phosphate may be sprayed on fields with prosperous vegetation and high fertility levels. 2%~3% of superphosphate leaching solution; 0.4%~0.5% urea and potassium dihydrogen phosphate mixture can be sprayed on the general field, sprayed once every 7~10 days, and sprayed 2~3 times. Each spray of fertilizer solution per acre 70 ~ 100 kg, sunny evening is appropriate.
High Precision Distance Sensor
Laser range sensors combine the advantages of a visible red sensing beam with the increased range of a laser. The optical distance sensor devices are Class 2 lasers, support Class 1 customized. The high precision autonics distance sensor is successfully be used to connect to Arduino, Raspberry Pi, with +-1mm to 3mm high accuray, and long-range solutions (max up to 150m) for your application.
Precision Distance Sensor,Precision Laser Distance Sensor ,Precision Distance Sensor Laser,Accurate Laser Distance Sensor
Chengdu JRT Meter Technology Co., Ltd , https://www.rangesensors.com