LABORATORY MANUAL IN FIELD CROPS 13 



PRACTICUM NO. 10 

 Object. A Study of the Wheat Head. 

 Material. Preserved wheat heads, several for each student. 



Method. Examine the heads of wheat. Remove the follow- 

 ing-parts, make drawings, and define empty glume, flowering 

 glume, palea, rachis, spikelet. 



For the head of wheat make the following determinations : 



1. Number of spikelets in each spike. 



2. Number of flowers in each spikelet. 



3. Number of empty glumes in each spikelet. 



4. How does the flowering glume differ from the palea ? 

 Make a sketch of an empty glume to show beak, shoulder, 



auricle. 



REFERENCES 



Bailey's Cyclopedia of American Agriculture, Vol. 2, pp. 373, 660-670. 

 Hunt's Cereals in America, pp. 26-137. 

 Livingston's Field Crop Production, p. 104. 

 Farmers Bulletins Nos. 210, 466. 



