Many inorganic fertilizers are usually synthesized in the lab. For instance using the "Haber-Bosch Process" produces ammonia as the end product. The ammonia is added to fertilizers as feedstock and this becomes the inorganic fertilizer. I don't know about you, but ammonia in soil raises big red flags in my mind. The use of inorganic fertilizers have been increasing steadily in the last fifty years or so. These synthesized fertilizers are mostly used to treat corn, barley, and even soy. They can have beneficial effects when used in moderate amounts.
Using excessive amounts of inorganic fertilizers can have some devastating effects, however. "Over-fertilization" can throw off nutrient levels in the soil and it eats away the minerals that crops need. Using too much inorganic fertilizer can also cause something called "fertilizer-burn", where roots dry out and if not treated right away can cause the plant to die.
The disadvantages of inorganic fertilizers are much worse than the disadvantages of organic fertilizers. The biggest disadvantage that the organic fertilizers is that using too much of it could cause the plant to catch some form of disease. Comparing it to inorganic fertilizers this is not that bad. The problem is that it is much more expensive that inorganic fertilizers. Because it is cheaper, buyers tend to go for the inorganic fertilizers. This is really unfortunate since organic fertilizers have a lot more benefits than the non-organic fertilizers. The disadvantages are even better (if that makes any sense).
Source:
Source:
http://en.wikipedia.org/wiki/Fertilizer
