Influence of Yara N-sensor on surface homogenicity of NDVI index influence of Yara N-sensor on surface homogenicity of NDVI index
2019
Stanić, Nikola | Višacki, Vladimir | Sedlar, Aleksandar | Ponjičan, Ondrej | Turan, Jan
With the expansion and availability of satellite data, it has never been easier to keep track of vegetation indices and changes occurring on plants. The standardized vegetation difference index, NDVI, in precision agriculture is used to measure biomass intensity, while in forestry it is used to quantify forest diversity and leaf indices. Using the Yara N-sensor, it is possible to achieve significant savings in nitrogen fertilizers while increasing yield by timely application of nitrogen fertilizers in the right quantities at the right place. The results of the NDVI index before and after variable application of mineral fertilizer are presented in the paper. The aim of the research is to find a correlation in the algorithm of the Yara N-sensor with the available satellite imagery in the form of the NDVI index. Variable fertilizer spread makes sense because no statistically significant difference was observed between passages F, D, A, B, E and C and it can be concluded with 95% certainty that the NDVI index is homogeneous. Based on all the data processed, it can be concluded that variable feeding with the help of the Yara N-sensor led to the balancing of the surface NDVI index 30 days after fertilizer application. Also the average fertilizer consumption per hectare did not significantly deviate from the target application rate. The yield obtained did not show the negative effects of using the N-sensor. The use of this sensor has a high potential to reduce input costs in crop production.
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