Electromagnetic response in stages of phenological growth of potato culture solanum spp with various methods to estimate evapotranspiration, using RGB and NIR images captured with a camera canon sx260hs

This article is focused on understanding how the potato crop behaves and captures the solar energy to be reflected, through the use of CANON SX260HS camera with sensor that capture the electromagnetic spectrum of the near infrared. This is captured during the phenological process of the potato crop Solanum spp. in its four stages of growth as: Vegetative Growth, Start of tuber production, Growth of Tubers and Maturation or Senescence, with a drip irrigationsystem. In each phenological stage we observe different behavior in the Reflectance of solar energy that is measured through the Normalized Vegetation Differential Index that ranges from 0.2 to 0.9. These results are obtained since irrigation sheets were applied according to the information on: three drainage lysimeters, evaporimeter tank and empirical formulas. In the field research, completely randomized blocks were designed with three treatments T1 = application of the irrigation sheet measured by lysimeter, T2 = application of the irrigation sheet measured with tank type A, T3 = application of the irrigation sheet calculated with formula with three repetitions of each.