Question

b) ________gives dark brown colour to the soil
​

Answer 1

Answer:

natural fertilizers

Explanation:

hope it will helpful to you

Answer 2

Answer:

Soil color is produced by the minerals present and by the organic matter content. Yellow or red soil indicates the presence of oxidized ferric iron oxides. Dark brown or black color in soil indicates that the soil has a high organic matter content. Wet soil will appear darker than dry soil.