Agricultural resources Flashcards
Natural resources
Land
animals
Plants
water
Agricultural resources
primary and secondary resources
renewable and non-renewable resources
Primary resources
resources that come from nature
Secondary resources
Resources that are made by people
Renewable resources
Resources that can be replaced naturally in a short period of time once used up
Non-renewable resources
Resources that cannot be replaced in a short period of time
Soil degradation
The loss in the productive potential of soil as a result of human activities
Chemical degradation
Acidification Leaching Nutrient imbalance Salinisation Nutrient depletion
Physical degradation
Structural
Compaction erosion
Run-off
Loss of biological diversity in soil
Loss of organic matter
Decrease in biomass components
Soil erosion
A physical form of soil degradation.
Wind and water are the agents of erosion
Types of erosion
Sheet erosion
Rill erosion
Gully erosion
Causes of soil erosion
Overgrazing Monoculture Cultivating marginal land Bad cultivation methods wetland loss or damage
Loss of nutrients is caused by
Starving the soil
Monocropping
Intensive farming
Salinisation
The soil salts up as a result of over-irrigation where water is used inefficiently
