This is just the beginning! Our collection holds over 300 years of history, including rare newspapers, obituaries, marriage records, birth records, and so much more—most of which you won’t find anywhere else!
Book review on Dr Hopkins soil fertility work in North Dakota
A long review by Prof J H Sheppard of Dr Gy ril G Hopkins book Boil Fertility and Permanent Agriculture appears in Hoards Dairyman. It covers soil science basics, soil classification, plant nutrients nitrogen potash and phosphoric acid and two cropping plans to maintain fertility without heavy fertilizers. The piece discusses soil surveys, nitrogen fixation by clover and bacteria, and contrasts traditional views with Hopkins ideas while citing historical authorities.
MENTIONED IN THIS ARTICLE
Hoard
Gyril G. Hopkins
J. H. Sheppard
Id. Agricultural College
North Dakota Library Association
Euthor
South Dakota
University of Dlinosy
Hopkins
Northwest
United States
New England
Connecticut
America
Corn Belt
van Hellimont
Weght
Ita
Canada
Whiney
Camerron
Varro
Columella
Raren Vom Lethigg
Aml
Columedin
Abraham Lincoln
Daniel Webster
James