1J:8 Principles of Plant Culture. 



pies are cabbage and tomato plants that lop over 

 when planted out, because grown in the seed-box to 

 transplanting size without "pricking off" (105) ; and 

 grain sown too thickly on rich ground, that falls 

 (lodges) before maturity. 



238. Too Close Planting Causes Deficient Light and 

 all the resulting evils. Indian com grown too thickly 

 does not ear well. and is lacking in nutritive qualities; 

 strawberry plants grown too closely do not fruit well 

 and the fruit lacks flavor and firmness; nursery 

 trees grown too closely are slender-stemmed, deficient 

 in foliage and have poorly developed roots. A rule to 

 govern distance in planting has already been given 

 (122). 



When a slender and flexible growth is desired, as in 

 trees grown for hoop poles, or willows for wicker-work 

 and tying, a certain amount of crowding is advisable. 



239. Weeds Cause Deficient Light in low-growing 

 crops, such as strawberries, dwarf beans, potatoes, etc., 

 and also tend to rob the plants of food and moisture. 

 They are, therefore, decidedly injurious (336). 



240. Plants Under Glass are Especially Liable to 

 Suffer from Deficient Light, because the walls and 

 sash bars of the structure necessarily intercept a con- 

 siderable part of the solar rays. The roofs of glass 

 houses should be formed of large lights of glass, with 

 the smallest possible sash bars, and the benches should 

 be arranged to bring the plants as near to the glass as 

 possible. 



Plants having their leaves densely covered with hairs 

 generally require a large amount of light. 



