Other green manure crops, such as legumes, might also make a difference. In synthetic fertilizers, the phosphorus is removed from the rock using acids, making the phosphorus more soluble and easier ...

Although organic fertilizers such as manure or compost ... Air Fertilizer also contains some phosphorus and potassium, and might even be able to supply plants with amino acids, potentially ...

The last witness to testify for the poultry companies said there has been a “dramatic increase” in poultry litter being ...