Natural fertilizers, which are also referred to as an organic fertilizer, the raw, natural materials of vegetable, animal, and mineral sources are derived. Natural fertilizers come with their own set of benefits, including less pollution threat. However, they are in a relatively larger amount to provide the same amount of nutrients supplied by synthetic or artificial fertilizers required.
Fish emulsion is pulverized fish in a mixed form, which provides 5 percent of direct nitrogen plants. The material also contains a number of trace elements. A disadvantage of the use of fish emulsion is the occasional strong smell that use often discouraged gardener.
Animal manure is a commonly used form of natural fertilizer. The nutrient content of manure varies according to what the animals were fed. The general rate of food in manure is about 1-1-1. The nitrogen in the manure is about 0.5 percent. Frequently used sources of manure containing chicken, cow, horse and sheep. Fresh manure has the highest content of nutrients. Manure works best when fully incorporated into the soil.
Dried blood fertilizer is the drained blood of slaughtered animals. This blood is dried, and then used after grinding to a powder. The product is a rich source of nitrogen and also supplies trace elements such as iron. They should not be more than the recommended amount, however.
As the name suggests, cotton seed meal obtained from the by-product of cotton manufacturing process and has different nutritional content. In general, cotton seed meal has 7 percent nitrogen, 3 percent phosphorus and 2 percent potash. The material is acidic in nature and works well as fertilizer for plants that prefer high acidity. These include camellias, azaleas and rhododendrons. The nitrogen contained in cottonseed meal is available to plants gradually.