All the fertilizers, whether organic; for producing organic food or inorganic; for producing conventional food, contain the same nutrients (elements) such as Nitrogen, Phosphorus, and Potassium etc. For example, if we consider the element Nitrogen, whether from organic or inorganic fertilizers both contain the same number of protons, neutrons, and electrons in its atoms. Plant systems cannot differentiate, whether these elements come from an organic or inorganic source. However, residues of the most of the chemical pesticides present in the food produced by conventional farming are undoubtedly harmful to us. If we avoid the residues of these harmful pesticides in food, then, there is no difference between conventional food and organic food.
The same paradigm is applicable in the case of dietary supplements and vitamin tablets: the vitamins and minerals etc. present in them may be produced by chemical methods. But, chemically, they are identical to their ‘natural counterparts’ from cereals, pulses, vegetables, fruits, dairy, and meats etc. Physiologically, both behave in the same manner in our body, if used as in prescribed amounts.
In addition to releasing nutrients, as organic fertilizers break down, they improve the structure of the soil and increase its ability to hold water and nutrients. Over time, organic fertilizers will make your soil–and plants–healthy and strong.
Since they are the ultimate slow-release fertilizers, it’s very difficult to over fertilize (and harm) your plants.
There’s little to no risk of toxic buildups of chemicals and salts that can be deadly to plants.
Organic fertilizers are renewable, biodegradable, sustainable, and environmentally friendly.
Although rather expensive in packages, you can make your own organic fertilizer by composting or find inexpensive sources—such as local dairy farms—that may sell composted manure.