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Use "clayish" in a sentence
"One thing I did learn by experience with lavender in my garden is that they hate having "wet feet" so, with clayish soil, add loads and loads of fine gravel to improve the drainage."
"Measurements of the magnetic value of the different soil types inside the pit by Branko Music proved that this red clayish soil was highly magnetic, whereas the values of the other soil types were more average."
"On the northeastern part of the pit, along the eastern side of the trench, a red clayish soil was found."