Phosphorus Cycle

Question 1

What percent of soil is P

Answer 1

0.1%

Question 2

Percent of total P available to plants

Answer 2

0.01%

Question 3

what percent of P from fertilizer will be used in the first year

Answer 3

10-30%

Question 4

Fixation and processes leading to it

Answer 4

Chemical process that makes P unavailable to plants. Precipitation reactions and absorption to Al and Fe oxide surfaces

Question 5

Net immobilization of P occurs when

Answer 5

C:P ratio > 250:1

Question 6

Net mineralization of P occurs when

Answer 6

C:P ratio < 250:1