306 FORAGE CROPS 
in destroying the fungus that causes clubroot. 
After the lime is harrowed in or before liming, it 
may be advisable to apply part of the fertilizers. 
Amounts frequently used are 400 to 800 pounds 
of acid phosphate, 15 to 16 per cent available, or 
its equivalent, i. e., 60 to 120 pounds of phos- 
phorie acid; 100 to 150 pounds of muriate of 
potash, and fifty pounds of nitrate of soda per 
acre. Manure, lime and fertilizers should be uni- 
formly applied. This important matter should not 
be neglected. If the seed is sown where the plants 
are to grow, the last harrowing should be done 
with the Meeker harrow or some tool which will 
fit the surface equally well.” 
The bulletin also gives the yields of varieties 
for 1904, 1905 and 1906, and states that the fol- 
lowing are essentials of a high yield: 
“First, rotation. It matters little what crops 
be grown, provided they are in accordance with 
rational practice, the main point being that when 
cabbage crops follow each other in succession the 
soil is likely to become infested with the elubroot 
fungus, which will render it unfit for growing cab- 
bage for a number of years. Second, early plant- 
ing. This gives time for full growth and develop- 
ment of the heads. Third, uniform stand. The 
number of plants per acre may vary between seven 
and ten thousand. As with many other tilled 
crops, however, it is more essential to have the 
