To ensure the healthy growth of plants, it is necessary to add fertilizer to the soil. This is because the nutrients lost due to absorption by plants and by leaching and washing or just evaporation. However, to the best use of fertilizers, must know the specific nutrient needs of the vegetables and the benefits of each of these nutrients.Out of the many things that a plant needs to grow, three are available in air and floor. However, plants consume nitrogen, phosphorus and potassium in large quantities. Therefore, these elements must be added to the soil through fertilizers.Poultry and manure, bone meal, green manure, granite dust, wood ash and phosphate rock, all fall under the broad category of fertilizers.1 organic. Manure: The main compost manure (horse, cow, pig, chicken, rabbit, etc.). Dehydrated, available raw manure and compost. Most gardeners do not like raw manure because of the smell. It also attracts flies and insects. More than raw manure may contain weed seeds left many undigested. The nitrogen-rich seeds that germinate rapidly and surrounding areas for the formation of the weeds. To manage these weeds is often a difficult and hard task.Since hindering germination fresh raw manure must be removed from the seeds remain. Rather be mixed with soil, often soaked before planting the seeds. The only feature that is rather cheap raw manure is available. Dehydrated manure and smell bad. The content of the diet of dry manure is always written on the bag in which it is sold. Before using dried manure in contact with the seeds, you need the water several times. However, you can apply composted manure anytime.2 secure. Green manure: the addition of more nutrients and other organic material to soil, green manure plowed in. It's usually a kind of plant is grown specifically for this purpose. Examples of cover crops are alfalfa, clover, red clover, buckwheat, Sudan grass and oats. The first three pulses. The roots of these can add valuable nitrogen to the soil, but grow.Crops term green manure is usually planted in summer for fall planting or can be planted in autumn, before the spring planting. Enter a three weeks gap between the teams of green manure crops and crop planting. Do not forget that green is not suitable for areas that face severe winter and freezing temperatures.3 suffered. Bone meal: It is nothing but animal bones from being crushed. This organic fertilizer has a low content of nitrogen and potassium, but rich in phosphorus. The rapid growth of plant roots, bone meal is used as starter fertilizer, because of its high phosphorus content. One of the benefits of bone meal that is not burning the seeds, but are expensive. Bone meal promotes the growth of vegetables and herbs when added to soil.4 pots. Granite powder: This fertilizer does not contain nitrogen and phosphorus but containing 4% potassium. It takes a long and almost 4 years for powder Granite to add nutrients to the plants.5. Phosphate rock: As the name suggests, is rich in phosphorus, nitrogen and potassium, but the fog. It takes many years for those nutrients from manure are added to the soil.6. Wood ash: The phosphate-rich fertilizer is a good source of potassium. Because they burn the wood formed, gets most of the nitrogen evaporates. For example, nitrogen. Depending on the type of wood, the nutrient content varies. Alkaline in nature, and that can be added to soil acidity.