Soil nutrients sensor

Hello. Good day. Do you have any idea where i can actually buy a soil nutrients sensor? nitrogen, phosphorus and potassium. Thank you!

Why did you think it was appropriate to post your question in the section of this Forum that deals with how the Forum website works?

Come to think if it, why did you ask the question on the Arduino Forum at all? Isn’t that a question for a horticulture or agriculture forum?