Soil Cycle
What is weathering?
Breaking down or dissolving of rocks
Explain what is needed for photosynthesis
Light, CO2 and water
What is an advantage of inorganic soil?
Can be manufactured with high demand/easy to store
What is intensive farming?
A farming system in which you produce a large amount from a small area of land.
A small family farm raising sheep and growing crops for themselves is what type of farming?
Mixed subsistence
True or false - Water is always beneficial to plants regardless of amount.
False
What happens when you grow the same plants consistently over time?
A build up of diseases in the soil
An increase in pest species that attack plants
A decrease in nutrients in the soil
What is erosion?
Materials are worn away and transported
Most plants thrive in this pH number
6.2 - 7
What is gradient?
The steepness or flatness of a slope
What is onion skin weathering?
When it is very hot in the daytime and very cold at night. This causes the surface of rocks to expand and contract until it eventually breaks off.
Plants require what 3 main minerals?
Nitrogen, phosphorus and potassium.
What falls under topography?
Gradient, Aspect, Altitude and Climate.
What are the size of the particles for the following particle types: Sand, Silt, and Clay
Sand: 2.0 - 0.02mm
Silt: 0.02 - 0.002mm
Clay: <0.002mm
Name the things we need for plant growth; there are 6
Availability of nutrients
Roots to uptake nutrients and hold plant in place
Water supply
CO2
pH
What are methods for sustainable agriculture?
Roof top farming, meat free food, and vertical farming