58 VEGETABLE FORCING 
wide range in texture and structure. The latter state- 
ment undoubtedly is true, for examples can be cited of 
greenhouse crops having been grown with entire success 
in soils which in their unimproved state possessed few if 
any of the characteristics that are regarded as important 
by greenhouse growers. Production, however, under 
adverse soil conditions is always more costly and more 
difficult. As previously stated, the sandy types are best 
adapted to all of the vegetables which are grown in 
frames or greenhouses. 
