The aim of one part of our project was to find the possibility of using methods of the near-infrared reflectance spectroscopy (NIRs) to analyse nutritional values of the fresh material (plats or silages) in practice. Near-infrared reflectance spectroscopy (NIRS) is a method of analysing composition of forages in a fast and repeatable way by exposing a sample to near infrared light and recording which wavelengths are absorbed and which are not. All of the major components of maize silage have known absorption rates of near infrared light. By calculating which wavelengths of light are absorbed and which ones are reflected back, a value can be assigned for how much of each component a feed has. AgriNIR™ is a portable NIR analyser for forages and grains that quantifies, in seconds, the percentage of Humidity or Moisture (dry matter), Starch, Crude Protein, Acid detergent fibre (ADF), neutral detergent fibre (NDF), Ash and Crude Fat of the plant material being analysed. The technical data for accuracy are: Humidity or Moisture 2%, all nutrients 3%. The complete analysis can be ready in 60 seconds. The use of screening instruments for detecting AgriNIR nutritional value of the food is even greater interest by laboratories, consultants and representatives of agricultural services (seed companies).