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A look: first look at whether the packaging bag logo meets the national standards, and then look at the appearance of the fertilizer, there is no obvious agglomeration in the bag, no obvious mud, brick and other impurities.
Two pinch: grasping a hand with a hand and holding the water to seep out, or loosening the hands to form a group, indicating that the moisture content exceeds the standard (standard moisture content ≤ 32%). The hand is loosened without obvious agglomeration, and has obvious elasticity such as expansion, indicating that the moisture content is qualified.
Three smells: smell it. After the bag was opened, there was obvious foul smell and sour taste, indicating that the fermentation was insufficient and the product was unqualified. Qualified products should be fully fermented, odorless and sour.
Four scales: weigh the weight. The country allows a weight error range of <1%, such as a package size of 50kg with an error of less than 0.5kg.
How to choose commercial organic fertilizer
Refined organic fertilizer is a commercialized organic fertilizer that uses various raw materials such as livestock manure and has high organic quality. The key to its quality is the amount of water and the degree of fermentation. The preliminary identification methods include means of seeing, pinching, smelling, and weighing.
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