1
Q
What are the main processes in the phosphorus cycle?
A
Absorption by roots
Decomposition
Sedimentation
Mountain building and weathering
2
Q
What are human impacts on the phosphorus cycle?
A
Mining of phosphate rocks
Fertiliser use
3
Q
How is sustainable management of the phosphorus cycle established?
A
Shortage of phosphates is a limiting factor on crop productivity
Biological wastes should be used as fertilisers
Crop breeding programmes
