162 FIELD CROPS 



Does not this indicate that the infection came from tlie seed instead of 

 spreading in the field? 



5. Obtain two small samnles of wheat. Sprinkle one with water, 

 just as you would do if treating for stinking smut as suggested in this 

 chapter. After treating the sample, allow it to stand for from ten to 

 fifteen hours. Then plant several kernels from both the treated and 

 untreated samples in a box of sand. Slightly moisten the sand as you 

 ordinarily would if you wished the wheat to germinate; keep the box 

 in a suitable place for wheat to germinate. Note the difference in 

 germination between the treated and untreated seed. 



6. Get a sample of wheat affected with stinking smut. Learn 

 to identify the smut balls. Does the sample show indications of being 

 smutted either by looks or by smell? 



7. Go into a field at harvest time or early in the fall; dig up some 

 wheat stubble, also some stubble from a timothy and clover meadow. 

 Compare the amount and character of the roots of the three kinds of 

 plants. Which crop will leave the most vegetable matter in the soil? 



8. Some time between January 1st and planting time, obtain 

 samples of wheat from a niunber of farms. Plant 100 kernels from 

 each sample in plate germinators. Compare the strength and per- 

 centage of germination. 



REFERENCES 



Cyclopedia of American Agi-iculture, Vol. II, Bailey. 



The Small Grains, Carleton, 



The Book of Wheat, DondUnger. 



Productive Farm Crops, Montgomery. 



Field Crop Production, Livingston. 



Cereals in America, Hunt. 



Farmers' Bulletins: 



466. Winter Emmer. 



534. Durum Wheat. 



596. The Culture of Winter Whesii in the Eastern United States. 



616. Winter Wheat Varieties for the Eastern United States. 



678. Growing Hard Spring ^Vheat. 



680. Varieties of Hard Spring Wlieat. 



732. Marquis Wheat. 



835. How to Detect Outbreaks of Insects and Save Grain Crops. 



863. Irrigation of Grain. 



885. Wheat Growing in the Southeastern States. 



895. Growing Winter Wheat in the Great Plains. 



938. Cereal Smuts and the Disinfection of Grain. 



