Agriculture. A trial of a crop, agricultural technique, machinery, etc., conducted in the open field, rather than under controlled conditions.

(a) a chemical test performed using a single drop or very small sample of the substance to be tested, typically with a reagent that produces a…

any of various tests for determining the hardness of a solid by making an indentation in a sample under standard conditions and measuring either its…

the carrying out of a spot test (in either sense).

a test for determining the reducing activity of a biological sample by measuring the time taken for the sample to decolorize an indicator (methylene…

a subjective measurement of the pungency of a chilli pepper, based on the detectability of pungency in a solution made from the pepper in question.