Given this table of plant residue analyses, choose the highest quality residue in terms of ...

Given this table of plant residue analyses, choose the highest quality residue in terms of suitability to support an active community of soil organisms and rapid nutrient cycling.

A B C D E
C/N ratio 15 15 15 45 45
Polyphenol content, 0.5 6.0 6.0 0.5 0.5
Lignin content, 10 40 10 40 10

A) A B) B C) C D) D E) E

Question 2

Well aerated soils enriched with organic amendments can help reduce the methane load in the atmosphere.

Indicate whether the statement is true or false

Question 3

The main contributions of the active fraction of soil organic matter are increased CEC and water holding capacity of the soil.

Indicate whether the statement is true or false

Question 4

In the United States, a national goal of maintaining 5 organic matter in all agricultural soils would be a practical and beneficial policy in the long term.

Indicate whether the statement is true or false

Question 5

The cation capacity of soil humus is two to three times greater than that of an equal volume of high CEC silicate clays.

Indicate whether the statement is true or false

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Given this table of plant residue analyses, choose the highest quality residue in terms of ...

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