Very good.

This product uses soybeans and bone meal as carriers, and is chelated with Trichoderma harzianum and Bacillus subtilis. It can effectively eliminate pathogens and pests in the cultivated layer, improve the soil, eliminate compaction, and improve soil permeability. and root oxygen supply, it can inhibit a variety of plant fungal diseases, and has obvious effects on soil-borne diseases such as root rot, gray mold, damping off, damping-off, and fusarium wilt!

How to check the quality of chemical fertilizers. 1. Look at the packaging.

According to the national solid chemical fertilizer packaging standards, fertilizers should be packaged in multi-layer bags or composite bags. The outer bag of the multi-layer bag is a plastic woven bag and the inner bag is a plastic film bag; composite bags are generally Plastic woven cloth and membrane are laminated together. The upper opening of fertilizer packaging should generally be rolled and sewn, and the stitching width should be 10 mm and synthetic fiber thread should be used. The packaging should not be broken or leaked.

2. Look at the bag leather logo.

For domestically produced fertilizers, the fertilizer name, trademark, specification grade, net content, nutrient content should also be marked on the fertilizer bag. The manufacturer's address and batch number, and the implemented fertilizer standards should also be indicated. Imported fertilizers should also be marked with the name and address of the importer.

3. Methods for testing nitrogen fertilizer quality 1. Burning method.

Put a small amount of chemical fertilizer on an iron sheet and burn it on a flame. If a strong and pungent ammonia gas is produced and no residue is left on the iron sheet, it means that the fertilizer is a high-purity nitrogen fertilizer.

2． Adding hydrated lime method: Mix a small amount of fertilizer with hydrated lime and stir. If a strong ammonia smell immediately comes out, it indicates that the fertilizer contains high nitrogen content.

3. Dissolution method: Take a small amount of chemical fertilizer and put it into a little water. If all the chemical fertilizer dissolves, it means that the purity of this nitrogen fertilizer is very high.

4. Methods for testing the quality of potassium fertilizer.

1. The dissolution method is the same as testing nitrogen fertilizer.

2. In the flame reaction method, absorbent cotton is made into cotton balls the size of soybean grains, moistened with 95% alcohol, and then dipped in a small amount of potassium fertilizer. Then use tweezers to hold the cotton ball and place it on the flame of the alcohol lamp to burn. If the flame is purple or light purple, it means the potash fertilizer is highly pure; if the flame is yellow or other colors, it means the potash fertilizer is impure.

5. Methods for testing the quality of phosphate fertilizer.

You can boil carrot peels with water, take the clear liquid, and then put a small amount of phosphate fertilizer into the clear liquid. If the carrot juice changes from purple to light green, it means that the phosphate fertilizer is of good quality.