Noun

1. The science and art of agriculture (legal term, Canadian use)
2. A sub-discipline of soil science which addresses optimising crop production (common usage, not acceptable to soil scientists)
3. A sub-discipline of agronomy which addresses the influence of edaphic conditions on crop production.

Synonyms

• pedology (common usage, not accepted as synonymous by soil scientists) http://en.wikipedia.org/wiki/Agrology#Is_Agrology_Synonymous_With_Soil_Science.3F
• soil science (common usage, not accepted as synonymous by soil scientists) http://en.wikipedia.org/wiki/Agrology#Is_Agrology_Synonymous_With_Soil_Science.3F
• edaphology (common usage, not used as synonymous by soil scientists) http://en.wikipedia.org/wiki/Agrology#Is_Agrology_Synonymous_With_Soil_Science.3F