34 .1 UNIT IN AGRICULTURE 



Ex. 8. Study of a Head of Wheat. 



Observe that the grains are arranged in groups on either side of 

 the stem. A single group is called a mesh. How many meshes on 

 this head? How are they arranged? How many grains in a mesh? 

 Is the number uniform? Are the meshes all filled? Find a mesh 

 with three grains, with four, with five. Carefully remove the cover- 

 ing from a single grain. How many coverings are there? How is 

 the grain attached? 



Ex. 9. The Wheat Plant. 



Pull up an entire wheat plant. How many stalks in the bunch? 

 Does the number vary with different bunches? How many joints in 

 each stalk? How many leaves on each stalk? Observe the form and 

 arrangement of the roots. From the data in Ex. 8 and 9, estimate 

 the number of grains that is produced by one grain. 



Ex. 10. Study of a Head of Oats. 



How does the oat head differ from the head of wheat? In what 

 are they alike? Make drawing. Carefully remove a single grain. 

 Notice the hard outer, cover. Remove the hard cover and make an 

 enlarged drawing of the kernel, naming parts. 



Ex. 11. Study of the Legumes. 



Material : red clover, alsike, white clover, alfalfa, soy beans, cow 

 peas. The specimens should be fresh, but dried ones may be used. 

 Study each plant separately. 



1. Observe the number, arrangement, size and shape of leaves, 

 and make drawing of a leaf. 



2. Observe the number and height of the stems, and the diameter 

 of stem an inch above the ground. Are the stems erect, spreading, 

 decumbent, or training? 



3. Are there many, few or no branches? 



4. If in bloom, notice the place, form, color, and size of blossoms. 

 Make drawing of a blossom. 



5. If in seed, note kind, number, and shape of seed pods. Xote 



