Being able to grow food and fiber while keeping our natural systems healthy for the long term.
What is sustainability?
100
This gives a plants a place to sink their roots and anchor themselves.
What is soil?
100
The pollutants move from level to level and get stored in organisms in the same way that food energy is stored.
What is bioaccumulation?
100
This is a technique of growing plants without soil.
What is hydroponics?
100
They allow warm-weather crops to be grown in Alberta.
What are greenhouses?
200
one third of people in the world use this crop. The seeds of this billion-dollar Alberta crop are ground to produce flour for making bread, pasta and hundreds of processed products.
What is wheat?
200
Is the material (non-organic) matter (rock, soil, clay) from which the soil developed.
What is parent material?
200
Using a pest's natural enemies to control it.
What is biological control?
200
This layer of soil holds nutrients and water for plants.
What is humus?
200
Soil that is blown away by wind and water.
What is erosion?
300
Most farmers grow their crops as an only one type of plant in a field.
What is monoculture?
300
These three ingredients often need to be added in fertilizer.
What is nitrogen, phosphorus and potassium?
300
Scientists have discovered that, as pesticide use increase the number of insect species that can withstand or ________ their effects are increasing.
What is resistant?
300
This is food that has been grown without the use of chemical fertilizers and chemical pesticides.
What is organic?
300
Another word for how farmers water their crops.
What is irrigate?
400
Includes: planning the cut, felling, dragging, preparing the site, building a road into the area...
What is harvesting trees?
400
These are he four key types of decomposers - each work differently.
What are bacteria, fungi, microscopic actinomycetes, worm?
400
Some of the chemicals wash off the plants and leave _____ on the soil and water.
What is residue?
400
This is a condition when the crust is salt that has collected on the surface of the soil.
What is salinization?
400
The layers in a cross section of soil.
What is horizons?
500
Fire control is a major part of this they of management.
What is forest management?
500
Six items that are in soil.
What is nitrogen, phosphorus, potassium, sulphur, calcium and magnesium?
500
This was the disease that has since wiped out nearly all of the native elm trees of North America.
What is Dutch elm disease?
500
This resulting organic matter gives the uppers horizon a brown or black colour.
What is topsoil?
500
The ________ or variety of plants and animals found in an ecosystem varies from one ecosystem to another.