In the past, when low-strength phosphorus general-purpose calcium phosphate was used, there was no problem of sulfur deficiency in the soil. In recent years, after replacing high-density heavy superphosphate, soil sulfur deficiency has occurred in some areas. Why is this? To clarify this issue, we must start with the composition of calcium phosphate and heavy superphosphate.
The main component of calcium phosphate is phosphorus monocalcium phosphate, which contains 14% to 18% of phosphorus, and calcium sulfate, which accounts for about 50%. Therefore, the application of universal calcium phosphate can not only provide phosphorus nutrition to crops, but also enable crops to obtain sulfur nutrition. However, superphosphate has a low phosphorus content and contains a large amount of accessory components. In order to overcome this shortcoming, there has been a type of phosphate fertilizer that is heavy calcium phosphate.
The heavy calcium phosphate is improved in the manufacturing method, so that impurities such as calcium sulfate are not contained in the fertilizer, so that the content of phosphorus is greatly increased and becomes a high concentration of phosphate fertilizer. Therefore, the problem of sulfur deficiency naturally occurs when calcium superphosphate is applied year-round.
The symptoms of crop sulfur deficiency are very similar to those of nitrogen deficiency. The main feature is the chlorotic chlorosis of leaves, but from the subtle manifestations, they are different. The symptoms of nitrogen deficiency begin with the lower old leaf, and the symptoms of sulfur deficiency start from the upper new leaf. For example, in the case of sulfur deficiency in potatoes, the upper leaves are generally yellowed, and brown spots appear on the leaves when they are severe.
Therefore, when planting sulfur-loving crops, it is recommended that calcium phosphate be used or calcium phosphate and calcium superphosphate be used alternately. This will reduce the problem of sulphur deficiency caused by the constant application of high-level phosphate fertilizers.
Pain Relief Patch For Neck Shoulder,Lower Back And Leg
Pain Relief Patch for neck shoulder, lower back and leg.
[Name] Medical Cold Patch
[Package Dimension] 10cm×12cm 2pieces/box
The pain relief patch is composed of three layers, namely, backing lining, middle gel and protective film. It is free from pharmacological, immunological or metabolic ingredients.
[Scope of Application] For cold physiotherapy, closed soft tissue only.
[Indications]
The patches give fast acting pain relief for strains, sprains, cramp, bruises, swollen areas or joint stiffness.
[How To Use a Patch]
Tear off the packaging bag and remove the patch. Remove the protective film and apply the patch on the skin. One piece, one time. The curing effect of each piece can last for 8-12 hours.
[Attention]
Do not apply the patch on the problematic skin, such as wounds, eczema, dermatitis,or in the eyes. People allergic to herbs and the pregnant are advised not to use the medication. If swelling or irritation occurs, please stop using and if any of these effects persist or worsen.notify your doctor or pharmacist promptly. Children using the patch must be supervised by adults.
[Storage Conditions]
Store below 30c in a dry place away from heat and direct sunlight.
Pain Relief Patch,Pain Relief Pad,Pain Relief Plaster,Neck Pain Relief Patch,Back Pain Relief Pacth
Shandong XiJieYiTong International Trade Co.,Ltd. , https://www.xjplaster.com