scientist hold litmus test paper for soil analysis show acidity chemical |
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| navigate by keyword : acidity agrochemical analysis assessment biochemical biologist biology botany chemical chemist clinic closeup container contamination development discovery eco ecology equipment experiment explore flask glove investigation lab laboratory litmus microscope model modern office paper person plant research researcher sample sampling science scientific scientist soil sterile strip substance test testing tool worker |
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| Close-up of scientist hold litmus test paper for soil analysis, litmus paper show acidity, chemical analysis. Soil sampling for ph test. Laboratory concept |
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