Soil (3rd Yr)

Question 1

Compositions of soil?

Answer 1

Mineral matter, humus, living organisms, Water, Air

Question 2

Soil profile name the 4 horizons in order

Answer 2

O horizon
A horizon
B horizon
C horizon

Question 3

Which type of soil has the highest water retention capacity?

Answer 3

Clay soil.

Question 4

Multiple choice: Which component is most responsible for nutrient supply in soil? A) Minerals B) Organic matter C) Air D) Water

Answer 4

B) Organic matter.

Question 5

What is soil pH, and why is it important?

Answer 5

Soil pH measures acidity or alkalinity, affecting nutrient availability.

Question 6

True or False: The topsoil layer is the most fertile part of the soil.

Answer 6

True.

Question 7

What is the term for the process of soil formation?

Answer 7

Soil genesis.

Question 8

Fill in the blank: Soil _____ is the term for the mixture of minerals, organic matter, gases, liquids, and organisms.

Answer 8

composition.

Question 9

Multiple choice: Which soil type is best for agriculture? A) Sandy B) Clay C) Loamy D) Rocky

Answer 9

C) Loamy.

Question 10

What are macro and micronutrients in soil?

Answer 10

Macronutrients are needed in larger amounts (e.g., nitrogen), while micronutrients are needed in smaller amounts (e.g., iron).

Question 11

True or False: Soil salinity can negatively impact plant growth.

Answer 11

True.

Question 12

What is the significance of soil horizons?

Answer 12

They represent different layers of soil with distinct characteristics.

Question 13

Fill in the blank: The process of breaking down organic matter in soil is called _____ by microorganisms.

Answer 13

decomposition.