The invention relates to agriculture, namely to methods for studying the composting of organic fertilizers. The aim of the invention is to improve the accuracy of recording the composting parameters. For this, the first layer of the collar is poured, the surface is smoothed and samplers 1, temperature sensors 2 and redox potential 3 are placed on it, the latter being placed on a line passing through two adjacent samplers 1. Next, pour the next layer on which in the same sequence have sensors. An object for microbiological research is also placed inside each sampler 1. Information from the sensors provides accurate data, since the integrity of the collar is not compromised during the composting process. 4 il.
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