Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
27 Cards in this Set
- Front
- Back
The biome with the poorest soil is the...
|
tropical rainforest
|
|
Good, rich topsoil is typically what color?
|
black
|
|
The top-most horizon consists of
|
organic matter and detritus
|
|
The label given to the top horizon is...
|
O horizon
|
|
Topsoil is found in the ___ horizon
|
A
|
|
Subsoil lacks....
|
nutrients and organic matter
|
|
Subsoil is found in the ____ horizon.
|
B
|
|
The ______ zone is found between the topsoil and the subsoil
|
leachate
|
|
Parent material can be found in the ____ horizon
|
C
|
|
Parent material consists of ....
|
Rotting rocks
|
|
The perfect blend of soil is called ....
|
loam
|
|
Loam consists of ___% clay, ___% sand, and ____% silt.
|
20, 40, 40
|
|
The smallest soil particle is ...
|
Clay
|
|
The largest soil particle is...
|
sand
|
|
Medium size soil particles are ....
|
silt
|
|
Clay is necessary in soil because of its ability to hold...
|
water and nutrients
|
|
Sand helps give ____ to soil
|
porosity and drainage capabilty to soil.
|
|
The total amount of air and water space in between grains of soil is...
|
porosity
|
|
Large particle soil has ____ porosity.
|
large
|
|
The smaller the soil particle size, the _____ the permeability
|
lower
|
|
The lower the permeability, the ____ the runoff.
|
greater
|
|
Soil that is compacted has ____ porosity and ____ permability
|
less, less
|
|
Soil that is already wet has ___ ability to absorb more water
|
less
|
|
A layer of soil is called a ...
|
horizon
|
|
The richest topsoil can be found in ....
|
grasslands
|
|
Why is tropical rainforest soil so bad?
|
Nutrients are locked up in the canopy; Moist, warm climate speeds decomposition and nutrient uptake.
|
|
What pH range should good topsoil be?
|
slightly alkaline ( not acidic)
|