soil pH+soil fertility
SOIL CAN BE ACIDIC OR BASIC
A. TRUE
B. FALSE
A.TRUE
what is a decomposer?
organisms that break the remains of dead organisms into smaller pieces and digest them with chemicals.
What will plants die without?
Lack of air or water.
The ___ horizon forms bedrock begins to weather
C
How does bedrock get into the mixture of soil
It just weathers
What does soil PH describe
How acidic soil is
name 3 types of burrowers
mice, moles, earth worms, prarie dogs, and squirells
Fill in the blank
----- soil feels course and grainy.
Sandy
The ____ is made up of topsoil
A
Name 3 particles of rock in soil
Answers could consist of being
Gravel,sand,silt, or clay
fill in the blankey
sandy soil containing little humus has____fertility
low
What do earthworms and other burrowing mammals mix to make soil
All materials in soil
Fill In the blank
------ is important for plant growth.
Soil texture.
The ___ or the subsoil usually consists of clay and other particles of rock,but little humus
B
Name 2 of the ingredients of soil
Answers could consist of being
rock particles, minerals, decayed organic material, water, or air
What does fertility measure
How rich soil is in humus
Name 3 decomposers
fungi, bacteria, worms, and other organisms
Fill in the blank.
Soil texture depends on -----
The size of soil particles.
The ___ horizon consists of organic material from plant and other remains.
O
What is humus
Humus is a dark-colored substance that forms as plant and animal remains decay.
What level of soil pH do plants grow best in
6-7.5
what forms humus
dead leaves, roots, and other plant materials.
Fill in the blank
----- is the best soil for growing most plants.
Loam
How does soil form
rocks break down by weathering and mixes with other materials on the surface
Soil is a mixture of what
rock particles,minerals,decayed organic material,water, and air