RESULT 1: Efficiency of fertilization is
low, unless iron & macronutrients are added & retained
1.
1.After 100 years, efficiency of
fertilization is 2 to 12%
if iron alone is added & lost, 40 to 42% if iron and macronutrients are added &
retained.
2.Takes up ~0.001 Gt C (iron added &
lost) to 0.1 Gt C (iron
& macronutrients added & retained) per episode.
3.Effect of additional patches scales up
approximately linearly
if they are separated in time, approximately 0.5x if they are separated in space.
4.Macronutrient addition results
rely on the assumption
that added iron remains labile, which is unlikely to be true.