Soils
Free to read here, from Project Gutenberg.
The Formation of Vegetable Mould Through the Action of Worms
Principles and practice of agricultural analysis. Volume 1 (of 3), Soils
Principles and practice of agricultural analysis. Volume 3 (of 3), Agricultural products
Soils, their formation, properties, composition, and relations to climate and plant growth in the humid and arid regions
Crops and Methods for Soil Improvement
Principles and practice of agricultural analysis. Volume 2 (of 3), Fertilizers
The Farm That Won't Wear Out
Lessons on Soil
The Story of the Soil; from the Basis of Absolute Science and Real Life
