How to determine the advantages and disadvantages of phosphate fertilizer
According to the observation of color and shape, the color of 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, phosphate fertilizer should be slightly sour, if there is no such taste, it means that the amount of sulfuric acid used in the production process is insufficient, the reaction is not complete, and the content of its effective components is low; if the sour taste is too strong, the content of free acid is too high, and its fertilizer efficiency is low. and after application will inhibit the activities of microorganisms in the soil, burn out the roots of crops, resulting in seeds do not germinate and other consequences. The water content of phosphate fertilizer is generally 8%-14%. It feels cool after touching it by hand, but there is no water trace. If the water comes out after pinching by hand, it shows that the water content is too high, and the quality of this kind of phosphate fertilizer is poor. If it feels like dry soil with your hands, it means that the acid treatment is not thorough and the content of its active components is low. Sampling testing, through the relevant departments to carry out sampling testing to determine the advantages and disadvantages of phosphate fertilizer.
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How to use plant growth regulators for flowers and trees
Plant growth regulators play an important role in regulating the growth of flowers and plants, preventing overgrowth, promoting rooting, cultivating strong seedlings, controlling sex differentiation, preventing flowers and fruits from falling, enhancing resistance, storage and preservation and so on. But different plant growth regulators are used because of the type, object, purpose and plant.
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How to restore the growth of Magnolia planted for many years
According to greening maintenance personnel, due to years of planting, little fertilizer is applied to this green land, including Magnolia. Thaw and freeze the trees every year, and at other times water the lawn with magnolia.
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