Add Compost to Soil to Improve Productivity

This page is the CodyCross answer for the clue below from Prehistory, Group 1260, Puzzle 2 (Tin and Copper).

Question is: Add Compost to Soil to Improve Productivity

and the answer is: FERTILIZE

Word Meaning:

FERTILIZE — To make (the soil) more fertile by adding nutrients to it.

Definitions from Wiktionary.