In view of the crop failures of the early '90's and the gradual
dry-farm awakening of the later '90's, Campbell's work was received
with much interest. He soon became identified with the efforts of
the railroads to maintain demonstration farms for the benefit of
intending settlers. While Campbell has long been in the service of
the railroads of the semiarid region, yet it should be said in all
fairness that the railroads and Mr. Campbell have had for their
primary object the determination of methods whereby the farmers
could be made sure of successful crops.
Mr. Campbell's doctrines of soil culture, based on his accumulated
experience, are presented in Campbell's "Soil Culture Manual," the
first edition of which appeared about 1904 and the latest edition,
considerably extended, was published in 1907. The 1907 manual is the
latest official word by Mr. Campbell on the principles and methods
of the "Campbell system." The essential features of the system may
be summarized as follows: The storage of water in the soil is
imperative for the production of crops in dry years. This may be
accomplished by proper tillage.
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