Scientific Study of Soil and Crop Production
Puzzle 15 of Spy World Medium Pack
Question is: Scientific Study of Soil and Crop Production
and the answer is: AGROLOGY
Word Meaning:
AGROLOGY — (rare) A subdiscipline of agronomy (the science of utilizing animals, plants, and soils) and of soil science which addresses the influence of edaphic (soil-related) conditions on crop production for optimizing it.
Definitions from Wiktionary.