TRUCK CROPS 301 



trucking business, the soil should be light, warm and 

 quick. Truck crops require heavy applications of fer- 

 tilizers. Cabbage and tomatoes succeed best on lands 

 that are rich in humus, hence it is best to practice 

 rotation of crops and include a cover crop of cow peas 

 or clover to turn under, or to apply annually an ample 

 supply of barnyard manure. Low lands are usually 

 richer in humus than uplands, and if properly drained, 

 make the better sites for truck gardens. 



Every truck crop demands special attention and treat- 

 ment, and details cannot be given here. The following 

 bulletins from the Department of Agriculture treat of 

 special truck crops : 



NOTE. The only practical suggestion to offer in con- 

 nection with this lesson is to advise every boy and girl 

 who reads it, seriously to try out some garden vegetable 

 for the profit there is in growing and marketing it. 



Tree Bulletins, U. S. Dept. of Agriculture 

 Farmers' Bulletins 



No. 35. Potato Culture. 



No. 354. Onion Culture. 



No. 52. The Sugar Beet. 



No. 60. Methods of Curing Tobacco. 



No. 82. The Culture of Tobacco. 



No. 83. Tobacco Soils. 



No. 120. The Principal Insect Affecting the. Tobacco Plant. 



No. 129. Sweet Potatoes. 



No. 61. Asparagus. 



No. 94. Cabbage. 



No. 220. Tomato. 



No. 282. Celery. 



No. 359. Canning Vegetables. 



Problems 



1. A sugar factory agrees to pay $4.50 per ton for 

 all beets testing 14 per cent, or less, of sugar. They 



