Looking For Crop Yield Dataset Suitable For PCA

I’m looking for datasets suitable for PCA examples – ideally something like crop yields as a function of soil nutrients.

Back in 1998-1999, I took an applied statistics course and the instructor demonstrated PCA through a dataset on crop yields. (No I don’t remember if it was wheat or corn or something more specific.)

The set had measured various soil nutrients across a field (potassium, calcium, sodium, phosphorous, nitrogen, etc.) and the idea was to perform PCA regression .. which if memory serves the first PC looked like pH (e.g., all the cations had positive coefficients, phosphorous and nitrogen had negative coefficients).

I’ve looked through a bunch of dataset archives with no luck. If anyone knows this source, or something similar, I’d be really grateful. Thanks in advance for any help.