Soil color is classified by
a. using a microscope
b. taking core samples
c. determining the proportion of minerals
d. using a color reference chart

Correct C). Determining the proportion of minerals

Soil color is known to be produced by the minerals in the soil and by the presence of the organic matter content in the soil.

Example: Yellow or red color of soil indicate that it has oxidized ferric iron oxides in it. The dark brown color of the soil shows the presence of high organic matter content.

The development of color in the soil is the result of biological and chemical weathering, especially the redox reaction.

a

explanation:

1: most common garden plants prefer loam — soils with a balance of different-sized mineral particles (approximately 40% sand, 40% silt, and 20% clay) with ample organic matter and pore space. however, some plants grow better in sandy soils, while others are well-adapted to clay soils.

2: available water capacity is the maximum amount of plant available water a soil can provide. it is an indicator of a soil's ability to retain water and make it sufficiently available for plant use. available water capacity is the water held in soil between its field capacity and permanent wilting point.

3: it is the same for all living things (plants and animals). it also includes very tiny organisms that our eyes cannot see. they are known as microorganisms, and include viruses, bacteria and fungi.