24 BULLETIN 258, TJ. S. DEPAETMEXT OF AGEICULTUBE. 
LESSON TWO. 
SUBJECT : FERTILIZERS. TOPICS: (1) CALCULATING FORMULAS; (2) HOME MIXING. 
Calculating formulas. — Interpreting formulas, finding the com- 
mercial value. 
Home mixing. — Advantages, fillers. 
Class assignment. — Duggar's. pp. 102-107, and Appendix, p. 1. 
Practical exercises. — (1) Club members should compound their fer- 
tilizers. If it is convenient, take the class to the home of some club 
member or some farmer who is mixing fertilizers and give the pupils 
practice in this work. (2) Have members of the class report the 
brands and formulas of fertilizers used at their homes, also the 
purpose for which each is used. 
Correlations. — Arithmetic: See ''Problems'' in Duggar's, p. 107; 
Farmers' Bui. 44, p. 14; United States Department of Agriculture 
Bui. 132. 
LESSON THREE. 
SUBJECT : FERTILIZERS. TOPIC : SUITING FERTILIZERS TO SOILS AND CROPS. 
Class assignment. — Duggar's, pp. 108-111 ; also Appendix, pp. I 
and II. Supplement the lesson with notes from Farmers' Buls. 44 
and 398. 
Practical exercises. — (1) Have the members of the class report the 
special formulas or brands used at their homes for corn, cotton, Irish 
potatoes, oats, and vegetables. Compare the percentages of essential 
elements in each case and explain why different formulas are used 
for different crops. (2) Compare the formulas reported by the 
pupils with those recommended in the textbook and in Farmers' 
Bui. 398. 
Correlations. — Language : Have the members of the class copy in 
their notebooks all the reports in practical exercise 1. Arithmetic: 
Continue the work as suggested in the previous lesson. 
LESSON FOUR. 
SUBJECT: HOME ORCHARD. TOPICS! (1) PLANTING AND TRAINING YOUNG GRAPE 
VINES! (2) PRUNING AND TRAINING BEARING VINES. 
Young vines. — Making cuttings, grafting, planting cuttings or 
rooted vines, first pruning, summer pruning. 
Bearing vines. — Principles, objects, and methods of pruning; 
training, the trellis; pruning implements. 
Class assignment. — Give to the class as notes material found in 
Farmers' Buls. 471, pp. 12-16: 181, pp. 22. 23, and 30-32. . 
Practical exercises. — (1) Make a trip with the class to a good 
orchard to observe practice in pruning. Make previous engagement 
