Fast spectrophotometric measurement of nitrate in water, soil and plant

Considering the plant's positive response to nitrogen, farmers consume nitrogen fertilizers as much as possible. Excessive consumption of nitrogen fertilizers imposes additional costs on farmers, environmental pollution and direct negative impact on human health. Therefore, it is important to determine the amount of nitrogen-nitrate in the soil, plant and irrigation water in order to use nitrogen fertilizers optimally. In addition, according to the nitrogen balance, the amount of nitrogen deficiency is calculated and given to the plant, therefore the overuse of fertilizer is avoided. Most of the usual methods for nitrate measurement are time-consuming and expensive, spectroscopic measurement (spectrophotometer) makes it possible to determine the amount of nitrogen-nitrate in each of the soil, water and plant in the shortest time, inexpensively and accurately. In this research, we introduced a quick method of measuring the amount of nitrate in each of the water, soil and plant. The results are presented in terms of practical units in the field and soil for farmers and students, including kilograms of nitrogen per ton of product and the amount of nitrogen given through irrigation or nitrogen available in the soil in kilograms per hectare.