How to Identify Organic Fertilizer
- Observe the color of organic fertilizer. The organic fertilizer dried by physical method still keep the color of the origin fertilizer, but its moisture is reduced. The organic fertilizer processed by composting will become brown or dark brown after, and there are no impurities in the finished product.
- Touch the organic fertilizer by hand. High quality organic fertilizers are soft and elastic in the wet state, but is brittle and easily broken after drying. Poor quality organic fertilizer can be touched by hand with impurities, especially sand.
- Soak the organic fertilizer in water. Take two cups of water, add some good and poor organic fertilizer, and you can tell the difference in a few minutes. Organic fertilizers are often adulterated by adding sand or soil to increase weight. Therefore, high-quality organic fertilizers are distributed evenly in the water, while bad organic fertilizer sinks a lot of sand or soil in the bottom of the cup.