It takes 20 minutes to test one soil sample (N, P, K) (including chemical preparation and soil sample pre-processing time). It takes ≤40 minutes to test three soil samples (N, P, K) at the same time. It takes ≤40 minutes to test 8 soil samples at the same time. Sample ≤1 hour. Test one fertilizer sample (N, P, K) for ≤50 minutes, and test three fertilizer samples (N, P, K) at the same time for ≤1.5 hours.