Questions & Answers about Substratul are pietriș.
In Romanian, the definite article is usually attached to the end of the noun instead of being a separate word like the in English.
So:
- substrat = substrate
- substratul = the substrate
The ending -ul is the masculine/neuter singular definite article here.
Romanian often leaves out an article in cases where English might say some or use a bare noun.
Here, pietriș means gravel, which is usually treated like an uncountable material noun, similar to sand or water in English.
So:
- Substratul are pietriș = The substrate has gravel
- It can also feel like The substrate contains gravel
You do not need an article before pietriș in this sentence.