62 HINTS ON SOILS AND FERTILIZERS 
illustrated in the State of Conneticut, where 
tobacco is raised largely in the shade, under 
canvas tops. A very excellent quality of to¬ 
bacco is raised in this state by having the to¬ 
bacco land covered most of the season with 
large canvas tops, so that the shade can be 
artificially controlled. 
Why do not farm crops grow during the win¬ 
ter? This is apparently a foolish question, but 
it brings out the importance of the need of a 
warm temperature for plant production. Some 
. crops will grow in comparatively cool weather, 
while others need a warm climate to grow to 
best advantage. We always plant our oats a 
few weeks earlier than we do our corn, because 
we have found that oats will grow at a lower 
temperature than corn will. 
Another factor that is gowing more impor¬ 
tant each year in the production of our farm 
crops, is the matter of insects and pests. Nearly 
every crop raised at the present time has some 
natural enemy, either an insect or a plant dis¬ 
ease. Most of us can recall the struggle of 
our potato plants during the growing season, 
as a good illustration of this fact. We know 
that the ever present Colorado Potato Beetle, 
commonly known as the “potato bug,” will eat 
up a good part of the foliage of the potato 
plant, if it is not given a stomach poison of 
seme such material as Paris Green, or arsenate 
of lead, sprayed on the foliage. Then the mat¬ 
ter of diseases demands attention. We can 
again refer to the potato plant in regard to 
iuch diseases. Either early blight, or late 
blight is a common enemy to the foliage of 
