Observe the color and morphology. The color of the phosphate fertilizer should be grayish white and the shape is powdery. If the color is white or yellow, it may be due to incomplete acid treatment and low phosphorus content. Smell the smell, the phosphate fertilizer should be slightly sour. If it is not, it means that the amount of sulfuric acid used in the production process is insufficient, the reaction is incomplete, and the active ingredient content is low. If the acidity is too rich, the free acid content is too high, and the fertilizer is low. And after application, it will inhibit the activity of microorganisms in the soil, burn out the roots of the crops, and cause the seeds to not germinate.
The moisture content of the phosphate fertilizer is generally 8% to 14%, and it feels cool after touching the hand, but there is no trace. If the water is squeezed out by hand, it indicates that the moisture content is too high, and the quality of the phosphate fertilizer is poor. If it feels like dry soil by hand, it means that the acid treatment is not complete and its active ingredient content is low. Sampling and testing, through the relevant departments to carry out sampling tests to determine the pros and cons of phosphate fertilizer.
The moisture content of the phosphate fertilizer is generally 8% to 14%, and it feels cool after touching the hand, but there is no trace. If the water is squeezed out by hand, it indicates that the moisture content is too high, and the quality of the phosphate fertilizer is poor. If it feels like dry soil by hand, it means that the acid treatment is not complete and its active ingredient content is low. Sampling and testing, through the relevant departments to carry out sampling tests to determine the pros and cons of phosphate fertilizer.
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