NitroHume, which is a kind of combined fertilizer, is known as a soil modifier that in addition to have beneficial advantages of humic acid compounds, contains a great amount of nitrogen in form of ammonium humat. This compound is recommended for the vegetative growth of all farm and orchard crops. The existing nitrogen in this compound move slowly compared to chemical fertilizers, and so, it is gradually released into the soil. Mentioned reason prevents its leaching (infiltration) and wasting in the soil. This compound also contains 3% pure potassium; therefore, in addition to provide a part of potassium requirement for the plant, enhances the nitrogen use efficiency.