Better yet, get them a big stack of these: https://fieldnotesbrand.com/products/expedition https://fieldnotesbrand.com/products/expedition They are pocket siz

Better yet, get them a big stack of these: https://fieldnotesbrand.com/products/expedition https://fieldnotesbrand.com/products/expedition They are pocket sized, "plastic paper" water and dirt proof field notebooks. And a stack of pencils to go with them. Because really, someone running a two-acre farm in some developing country has enough time to make manual adjustments to the irrigation system, manual notes of minutiae etc. They will be manually going through the fields to pick weeds, inspect crops etc. anyway.