There is a current discussion about cereals quality, with a tendency of changing in grain commercialization, not being by yield, but commercialized by grain protein. One of the factors affecting grain protein is nitrogen fertilization, therefore, with adequate management may increase significantly the grain quality. In the other hand is the most concerning nutrient relative to environment, being able to pollute ecosystems and water courses. Worldwide, the nitrogen use efficiency by cereals is about 33%, and the rest results in losses to the environment and farmers. This work objective is use an active optic sensor (GreenSeeker®, NTech Industry Inc., Ukiah, CA), which the functioning system consists of emitting radiation in two specific wavelengths (Red = 660 nm and Near Infrared = 780 nm) and capture the light reflected by the leaves, as tool to study the spectral behavior of corn and wheat crops under different nitrogen treatments. Due to the rising number of studies in this research line outside the country, the suggestion is to evaluate the same process in Brazilian conditions and estimate the nitrogen content in these crops and propose an adequate management of nitrogen fertilizers. The intention is to increase grain protein, and consequently improve farmers profit, reducing, at the same time, the environmental impact risks caused by possible excess of nitrogen on plantations.
News published in Agência FAPESP Newsletter about the scholarship: