Learn all about manure and how to use it in this detailed PDF manual!
Included in this ebook:
Beginning of agricultural chemistry
Early theories regarding plant-growth
Charles Bonnet's discovery of source of plants' carbon
Theories on source of plant-nitrogen
Development of agricultural research in Germany
Review of our knowledge of plant-growth
What constitutes fertility in a soil
Definition of manures
Different classes of manures
Process of nitrification
And Tons More! Over 300 pages of manure! 😉
This PDF manual is just $1.00!