Soil Fertility
- Created by: justine rail
- Created on: 07-12-12 12:09
View mindmap
- soil fertility
- organic matter
- contains nutrients
- retains moisture
- improved structure
- provides food for organisms
- testing for organic matter content
- weigh dry sample, burn at high temperature, reweigh
- texture
- clay
- small pore spaces
- can become waterlogged
- negatively charged particles, retains nutrients
- small pore spaces
- sand
- large pore spaces, drains well
- good root penetration
- nutrients easily leached
- silt
- measure by sedimentation or soil sieve
- soil triangle
- clay
- water - nutrients dissolved in it
- measure - weigh, evaporate the water and reweigh
- pH - extreme conditions will denature root cell proteins
- measure with barium and universal indicator
- soil structure
- crumb, blocky or platy peds
- thermal capacity
- water has high specific heat capacity, so wet soils retain heat
- important for seed germination and biochemical reactions
- water has high specific heat capacity, so wet soils retain heat
- aeration - for decomposition and nutrient recycling
- organic matter
Comments
No comments have yet been made