How to tell good phosphate fertilizer from bad? A few practical methods
August to October is the suitable sowing period for autumn crops in the south, such as rapeseed, broad beans, green manure, potatoes and various autumn vegetables, all of which are sown during this period. Experienced farmers know that autumn crops emphasize the application of phosphate fertilizer; this is based on the causal relationship between crops, soil and fertilizer, and is determined by phosphate fertilizer itself...
Many farmers have called to ask how to verify whether phosphate fertilizer is genuine and how to confirm whether the phosphate fertilizer they are considering buying is good or bad. Here are some tips for distinguishing good from bad, for reference only:Observe the color and form. The color of phosphate fertilizer should be grayish white and its form powdery. If the color is white or yellow, it may be because the acid treatment was incomplete and its phosphorus content is low. Smell the odor. Phosphate fertilizer has a slight sour smell. If it lacks this smell, it means that insufficient sulfuric acid was used in the production process, the reaction was incomplete, and its effective ingredient content is low. If the sour smell is too strong, it means the free acid content is too high, its fertilizer efficiency is low, and after application it will inhibit the activity of microorganisms in the soil, burn the seedling roots of crops, and cause consequences such as seeds failing to germinate.
The moisture content of phosphate fertilizer is generally 8%-14%. After touching it with your hand, it feels cool, but there is no water mark. If water comes out after squeezing it in your hand, it indicates that its moisture content is too high, and the quality of this kind of phosphate fertilizer is poor. If it feels like dry soil when touched by hand, it indicates that the acid treatment was not thorough and its effective ingredient content is low. Sampling and testing. Have the relevant departments conduct sampling and testing to determine the quality of the phosphate fertilizer.