TRUCKING. 



NOTE TO TEACHER. Have the pupils learn to recognize some of the 

 well known varieties, as, Early Rose, Early Ohio, Early Michigan, 

 Triumph and some of the late varieties Peerless, Peachblow, Rural 

 New York, Green Mountain, Burbank, etc. 



One of the best methods for conducting an experiment to 

 determine the requirements of a potato soil is the following plan 

 which is. accessible to both the student and the farmer. 



PLAT METHOD. 



1 



2 

 3 



4 

 5 

 6 



1 

 8 

 9 



10 



NITROGEN. 



POTASSIUM. 



PHOSPHORUS. 



CHECK. 



NITROGEN AND POTASSIUM. 



NITROGEN AND PHOSPHORUS. 



POTASSIUM AND PHOSPHORUS. 



CHECK. 



NITROGEN, POTASSIUM AND PHOSPHORUS. 



BARNYARD MANURE. 



The plats should be numbered. The fertilizers should be 

 carefully weighed. The potatoes in each plat should be weighed 

 and the rate of production per acre determined. 



A large number of plats may be used so that the experiment 

 will show the results of using different quantities of fertilizers 

 and manures. 



In all these experiments care should be taken to have uni- 

 formity in size, quality, and type of potato. 



PROBLEMS. 



1. A conservative estimate made by the U. S. Government experts 

 of the increase in potato production that might be expected from the use 

 of high grade seed has been placed at 10 per cent. If our crop is es- 

 timated at 350,000,000 bus. and the price is 50c a bushel what would be the 

 value of this 10 per cent increase in production? 



27 



