Stars of Inequity , pg. 104

"HARVESTING RESOURCES
Colonies on worlds that possess significant deposits of natural resources (as described in Resources on page 27) can be set to work harvesting these deposits. At the end of every 90-day cycle, a Colony tasked with harvesting a deposit reduces the Abundance of that Resource by an amount determined by Table 1–19: Resource Depletion (see page 28).
When it does so, the Explorers have two choices. They can either have the Colony use these resources to grow, adding a bonus of 1d5 to the result of the next roll the Colony makes on Table 3–3: Colony Growth (see page 103). Alternatively, they can take the profits for themselves, receiving 1 Profit Factor for a Colony of Size 1–4 and 2 Profit Factor for a Colony of Size 5+. If they choose the latter, they must put in an appearance at their Colony and convince their lackeys that this was all for the best; otherwise, the Colony’s Complacency decreases by 1d5."

Stars of Inequity , pg. 28

Table 1–19: Resource Depletion
Endeavour Size Abundance Reduction
Completing a Single Objective 1d5
Completing a Lesser Endeavour 1d10
Completing an Endeavour 3d10+5
Completing a Grand Endeavour 5d10+5
Small Colony’s Yearly Take 1d10+2
Large Colony’s Yearly Take 3d10+5

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When set to harvest a resource, is a 90-day cycle equivalent to a colony's yearly take? Or is it described elsewhere in Table 1-19?

I assume it's one of those interminably irritating editing changes that someone made between the submission of the original document and the final document. Personally I found that the 90-day cycle was too rapid, so I changed it to a year. Has the handy effect of making planets not become barren, worthless husks within five years.

I thought that abundance reduction is done after four 90-day cycles.