True or False? You can never have too much irrigation.
What is false.
100
Frequent plowing does this to the soil particles.
What is make them smaller/finer.
100
Alternating crops from year to year is called this.
What is crop rotation.
100
These are the 3 types of soil.
What is sandy soil, clay soil and loam soil. :)
100
The spaces in the soil are called this.
What is pores.
200
Fertilizers are used to replace ____________ in the soil.
What is nutrients.
200
Plowing is the process of cutting into soil. What are the 2 main purposes of plowing?
What is make more air pores and make the soil fluffier or less compact.
200
For crop rotation to be successful what must you do?
What is ensure that plant needs for nutrients are matched up.
200
This is also known as organic material/particles that is partially decomposed.
What is humus.
200
Pores in soil are filled with these 2 things.
What is air and water.
300
There are two types of fertilizers. This particular type consists of mixtures of chemicals, like potassium, urea and ammonia.
What is chemical fertilizers.
300
What are the 2 reasons why farmers cleared land when they wanted to plant new crops?
What is to make it EASIER to plant new seeds and to REDUCE COMPETITION between crops and other plants.
300
True or False? If you grew the same crop year after year the soil would run out of nutrients.
What is True.
300
This type of soil has a lot of nutrients, because it has a balance of humus (organic particles) and mineral particles.
What is loam soil.
300
In this environment, humans do not become involved and all living things die and decompose and return nutrients to the soil.
What is a natural environment.
400
Too little water/irrigation prevents seed ______________.
What is germination.
400
True or False? Clearing the land of plant cover is NOT a natural occurrence in nature.
What is true.
400
Instead of crop rotation to replenish nutrients in the soil, we can also use _____________, but this can be _______________.
What is fertilizers and expensive.
400
This type of soil is made up of mostly mineral particles and has good water drainage (meaning the water flows straight through it).
What is sandy soil.
400
Soil is an important natural resource because...
What is it allows us to grow the plants we need for food.
500
Too much irrigation can cause dissolved salts to rise to the topsoil when water evaporates. This can make the topsoil too ________ for plants to grow.
What is salty.
500
If clearing is not done properly, these 3 things can happen.
What is soil can be 1) eroded by wind/rain; 2) soil can be compacted/squeezed by pounding rain; 3) there will be no shade from plants so the soil would be warm and dry.
500
Is this crop rotation effective:
One year we plant crop A which uses a lot of nitrogen and very little phosphorus. The next year we plant crop B which also uses a lot of nitrogen and a lot of phosphorus.
What is NO. Both plants use a lot of nitrogen so we would run out of nitrogen in the soil! :(
500
Clay soil has very __________ pores because it has very _________ particles.