Farming Flashcards
What mineral ions do fertilisers have
What are their uses
Nitrates: amino acid
Magnesium: chlorophyll
Benefits of organic fertilisers
Return nitrates to soil
decaying matter improves soil structure
readily available
wide mineral range
Cons of organic fertilisers
Slow acting,
Contain pest
Bulky
Less nitrogen content
Benefits of using inorganic fertilisers
Contents known,
Fast application,
Can replace all lost nitrates
Ez application
Cons of using inorganic fertilisers
Damage soil structure
Reapplication needed (leach)
Eutrophication (leach, algae bloom, other plants die, bacteria growth, fight for O2)
Expensive
Types of pests, how they’re bad and the type of pesticides targeted to them
Weed, compete for light, C.D., nitrates, water, herbicides
Insects, decrease SA for photo, Insecticide
Fungi, decrease SA for photo, fungicide
What is bio accumulation
The accumulation of pesticides along the food chain and reaches a harmful level at the top
As it is fat insoluble (x excreted)
Which type of pesticide is more favourable to prevent bio accumulation
Biodegradable
What is biological control
The introduction of another organism which controls the number of pests
Types of biological control
Herbivores
Natural predators
Sterile males
Parasites
Pathogenic microorganisms
Pheromones
Benefits of using pesticides
Fast
Eliminates all
Cons of using pesticides
Not specific
Reapply
Bioaccumulation
May become resistant
Pros of using biological control
Specific
1 introduction
X chemicals
X resistant
Cons of using biological control
Slow
X fully eradicate
Fish farming in terms of food
Feed in small amounts
High protein (growth)