FTIR photoacoustic spectroscopy was used to approach inorganic matrix components and organic-matter constituents of chernozem size fractions (1–5000 μm, by dry sieving) with a different history of use (from intact steppe to permanent bare fallow, a continuous long-term field experiment). The conditions of FTIR photoacoustic measurements in continuous-scan modes were compared with attenuated total reflection measurements, the advantages of photoacoustic measurements resulting from a higher intensity of the incident radiation and signal-generating volume were discussed. Overtone peaks of quartz as a soil matrix component at 2000–1700 cm^–1 were selected as a possible internal-standard (guide) bands for the comparison of photoacoustic spectra. For different land-use samples, differences in the composition were found, which are differently manifested in normalized spectra of size fractions, with millimeter-size, 20–100 μm, and silt fraction bearing the maximum information.

FTIR 光声光谱用于研究具有不同使用历史（从完整的草原到永久裸露休耕地、连续的长期田地）的黑钙土尺寸级分（1-5000 μm，通过干筛）的无机基质成分和有机质成分实验）。将连续扫描模式下的 FTIR 光声测量条件与衰减全反射测量进行比较，讨论了更高强度的入射辐射和信号生成体积带来的光声测量的优势。选择 2000–1700 cm ^–1处作为土壤基质成分的石英泛音峰作为可能的内标（引导）带，用于光声光谱的比较。对于不同的土地利用样品，发现了成分的差异，这在尺寸分数的归一化光谱中表现不同，其中毫米尺寸、20-100μm和粉砂分数承载了最大的信息。