Accuracy

How close a measurement is to its true value. For example, a soil pH meter used in the field might record a measurement of 6.5, yet the true value, which was obtained from a laboratory test was 5.8. This example would not be considered very accurate but might be considered helpful in giving a general indication of soil pH as it is within say 1 pH unit. However, if the true value was 4.5 but the recorded value was 5.4 then this could have much more significant implications for material inputs and maintenance decisions, so the degree of accuracy may or may not have significant implications for turf management context. Compare ‘Precision'.