PREFACE 
THE present work is primarily a text-book, but some 
technical information is included that might more properly 
be consigned to a reference book. To a considerable 
extent this reference matter is appended to text para- 
graphs in the form of notes in smaller type. Although 
the chief emphasis is placed on Systematic Agrostology, 
comprising Part II, a brief outline of Economic Agros- 
tology is presented in Part I. In this part the clovers 
and other forage plants not belonging to the grass family 
are referred to in classifying the forage plants and their 
uses. The reader will observe that by the plan adopted 
the information on a given grass is not found segregated 
in a single paragraph or chapter but is scattered to meet 
the necessities of the classification used. The index 
makes these scattered paragraphs readily accessible. 
The botanical information concerning each species 
will be found in the appropriate paragraph in Part II, 
but the economic information will be found classified in 
Part I, a part under the chapter on meadow plants, for 
example, and a part under the chapter on pasture plants. 
It seems to the author that this method has didactic 
advantages. In a reference book it might be more con- 
venient to have all the information on one species placed 
in sequence. Part'I is too elementary to meet the demands 
of a course in agronomy, but it is hoped that it may be 
found useful as a bridge to connect the subjects of Sys- 
tematic Agrostology and Agronomic Agrostology. 
(v) 
