Give three reasons as to why fertilisers are needed in agricultural ecosystems
- All plants need mineral ion - High demand for food and intensive food production makes large demands on the soil - They are an artificial means of returning minerals to the soil that have been taken away by crop growth
Dead and decaying remains of plants and animals, manure and slurry
3 of 9
How are artificial inroganic fertilisers created?
The minerals are mined from rocks and deposits which are then converted into different forms and blended together to give the appropiate balance of minerals for a particular crop
4 of 9
Give three reasons as to how fertilisers increase productivity
Plants with readily available ions tend to develop earlier, grow taller with greater leaf area - Increases rate of photosynthesis - Improves crop productivity
5 of 9
Why is nitrogen needed in plants?
It's needed for amino acids, ATP and nucleotides in DNA
6 of 9
Why is phosphorus needed in plants?
For ATP and DNA nucleotides
7 of 9
Why is potassium needed in plants?
For growth
8 of 9
Why do farmers do crop rotation?
Different crops use different nutrients hence if one crop uses a lot of one mineral in the soil then the crops are rotated, another crop may use another mineral
Comments
No comments have yet been made