The phrase "indicates the maturity" is correct and usable in written English.
You can use it when describing something that implies a certain level of understanding or capability. For example, "The level of complexity of the task he was performing indicates the maturity of his thought process."
"Gamergate" – the online campaign that tried to silence women and liberal thinking in the gaming community - was conspicuously absent from the vast programme agenda, which indicates the maturity of the curators.
According to Bernal et al. (1998) a C/N ratio less than 12 indicates the maturity of the compost and its suitability for addition to soils.
Decrease in enzymatic activity during the composting process is related to the decline in microbial activity due to reduction in the amount of available substrates (Garcia et al. 1993; Benitez et al. 1999) and indicates the maturity of the compost.
Secondly, publication status indicates the "maturity" of research, and journal publication often represents the formal end-point of a research study.
The PNEA-mPh functionalized material also showed an increased ratio of collagen I to collagen III, as per real-time polymerase chain reaction (RT-PCR) analysis, which also indicates the maturity of the differentiated cells into tendon cells.
The hypsometric integral obtained is 0.316, indicating the maturity stage of the basin (Fig. 7).
All the composting trials accomplished ambient temperature at the end of 20th day indicating the maturity of compost.
The C/N ratio is usually employed to indicate the maturity degree of compost Bernal et al. (1998).
C N ratio is a widely used parameter to indicate the maturity of the compost (Huang et al. 2004; Jiang et al. 2011).
The result of the experiment indicated that all the parameters were improved by the decomposition using earthworms and the C/N ratio was within the limits that indicate the maturity of the compost.
Cytokeratin staining for different epithelial cell population indicated the maturity of EBECs in ALI-culture.
