Agricultural chemistry — Audiobooks
Elements of Agricultural Chemistry
by Thomas Anderson
Principles and practice of agricultural analysis. Volume 2 (of 3), Fertilizers
by Harvey Washington Wiley
Principles and practice of agricultural analysis. Volume 1 (of 3), Soils
by Harvey Washington Wiley
Elements of agricultural chemistry and geology
by Jas. F. W. (James Finlay Weir) Johnston
Principles and practice of agricultural analysis. Volume 3 (of 3), Agricultural products
by Harvey Washington Wiley