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.