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MAVERICK [17]
3 years ago
8

15.2

English
1 answer:
solmaris [256]3 years ago
5 0

Answer:

28 true. Humus: the organic component of soil, formed by the decomposition of leaves and other plant material by soil microorganisms.

29 false,  Soil organic matter is the fraction of the soil that consists of plant or animal tissue in various stages of breakdown (decomposition). Most of our productive agricultural soils have between 3 and 6% organic matter. Soil organic matter contributes to soil productivity in many different ways.

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According to my research on experiment legal procedures, I can say that based on the information provided within the question all studies involving human subjects must include informed consent. This term is defined as permission granted in full knowledge of the possible consequences. If a researcher does not have this, then the researcher cannot legally use the subject for his studies, since in the eyes of the law it may be considered torture or kidnapping since you do not have proof of the subjects consent.

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

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