AGRICULTURE FOR SOUTHERN SCHOOLS. 19 



essential ingredients are concerned and such mixtures as are needed 

 for the important local crops prepared. All ingredients should be 

 weighed accurately. 



Record and report: Each student should keep a record of the 

 weights and percentage composition of the materials used and com- 

 pute the cost in comparison with the ready-mixed fertilizers sold 

 on the market. 



Note.— In connection with this exercise the students should submit formulas 

 of other mixtures which would prove economical. 



Lesson 27. — Barnyard Manure. 



1. Benefits of barnyard manure. 



2. Comparative value of different manures. 



3. Factors influencing the value. ' 



Lesson 28. — Barnyard Manure — Continued. ' 



1. Care and management of manure. 



2. Applying manure to the land. 



Special references : Barnyard Manure, Fai'mers' Bulletin 192 ; Farm 

 Manures and Fertilizers, U. S. Dept. of Agriculture, States Relations 

 Service Doe. 30, Ext. S. "A" 77. 



Exercise 18. — A Field Study of the Care and Use of Barnyard 



Mam/wre. 



Purpose: To impress upon the minds of the students the results 

 of proper care and use of barnyard manure in contrast with the 

 results of improper use. 



Directions : The class should visit a farm where manure is left in 

 open piles to leach away. In making a visit to any farm where im- 

 proper methods are to be noted, judgment and tact must be used or 

 offense will be given. It may be necessary for the class to merely 

 make a casual observation in passing such a farm on the way to visit 

 a farm where favorable comments may be made. In visiting a farm 

 where proper methods are used in caring for manure the students 

 should observe the effect on the growing crops and upon the farm as 

 a whole. 



Record and report: Each student should take notes upon what he 

 sees and make a written report. Answers to the following questions 

 should be included in the report : What is your estimate of the value 

 of a ton of barnyard manure in the district ? In what ways may this 

 value be lessened ? What is the most practical means of conserving 

 the liquid manure? How may leaching be prevented? What is the 

 most efficient method of removing manure from the stable? Is it 

 practical to remove it to the land each day throughout the year ? Is 

 a manure spreader a paying investment for the farms visited? What 

 is the best means of caring for the manure on these farms? 



