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Maybe I could've used more salt.
Lightly-salted potato chips aren't that popular.
"Hey! I heard that if I make salty jello for Koichi, I’ll get a free TextFugu account." "It’s better if you don’t believe that. I think it’s a lie!"
The taste of salt is a salty taste (it's also when something tastes salty).
The readings are the kun'yomi vocab readings. So, take the readings of 塩 (you learned the reading with the kanji) and 味 and you have yourself しおあじ.
If you happen to be a cooking show fan, you might also hear the kun'yomi reading of this word - えんみ. This word can also be read as しおみ, which has more or less the same meaning as the primary reading you learned.