2

I tested my garden soil (NPK for guidance in applying fertilizers) but now I'm questioning my results.

I collected the soil as per the instructions and left it to dry in a bucket. Once dry, I left it for several months in a garage, exposed to open air.

Would this change the amount of phosphorus or nitrogen detected by a soil test? These two components came back as depleted.

2
  • If you followed some technical instructions, then that's how it is. Care to share the origin and content of the instructions ? Feb 27, 2023 at 1:48
  • The instructions did not specify if a sample needed to be processed within a certain window
    – nuggethead
    Feb 27, 2023 at 2:46

1 Answer 1

1

Unlikely, unless you had just applied a volatile form of nitrogen fertilizer (inclusive of tilling in legumes, evidently)

Phosphorous is essentially non-volatile, so drying in a bucket sould not remove any (it's lost by leaching, erosion, and plant uptake)

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.