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RESEARCH ON SOIL PROPERTIES ANALYSIS USING SPECTROPHOTOMETRY
Abstract
The use of synthesis chemical substances in agriculture for increasing agricultural production and ensuring food across the globe is a process that has as a reverse negative effects on the environment and human health. According to the research conducted widely it has proved that, these synthesis substances that sometimes are toxic (pesticides, herbicides, etc.) have a negative influence on human health ultimately, also by polluting the environment, which represents the biggest challenge of the humanity today - climate change. Knowing the composition of unwanted substance and all the elements of the soil contributes to the human food chain and not only, is very important. Spectrophotometric determination methods can be very useful in this matter. Spectral determination using the spectrophotometer can lead to very good results in knowing the quantitative and qualitative composition of these soil components that affect the food chain. The paper studies analysis methods of soil spectra, in order to determine their composition. Spectra for different soil types, available in international databases or own database, developed through experimental determinations are used. These spectra are compared with the spectra of the analysed soil samples. The comparison methods of the spectra can be of various ways: spectral correlation, FFT analysis (Fast Fourier Transform) etc. In this way, the soil composition is determined qualitative (very good, good, satisfactory, unsatisfactory) or quantitative if the correlation is very good between sample spectrum and reference spectrum.
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