2% 



f 



or more plant food constituents we would recommend the "Five Plot Experiment" 

 here illustrated and laid with the same detail as previously mentioned. 



Plot 1, is a check receiving no fertilizer. 



Plot 2, receives a complete mixture of nitrogen, phosphoric acid and potash 



at the rate of : 



Per Acre. 1/20 Acre. 



Sulphate of Ammonia 150 lbs. IVz lbs. 



Superphosphate 400 " 20 " 



Muriate of Potash 150 " T^ " 



Plot 3, receives a mixture of phosphoric add and potash only, at the rate of : 



Per Acre. 1/20 Acre. 



Superphosphate 400 lbs. 20 lbs. 



Muriate of Potash 150 " T^ " 



Plot 4, receives a mixture of nitrogen and potash only, at the rate of: 



Per Acre. 1/20 Acre. 



Sulphate of Ammonia 150 lbs. 7% lbs. 



Muriate of Potash 150 " 7i^ " 



Plot 5, receives a mixture of nitrogen and phosphoric acid only, at the rate of: ■ 



Per Acre. 1/20 Acre. 



Sulphate of Ammonia 150 lbs. 7^^ lbs. 



Superphosphate 400 " 20 



Sulphate of Ammonia is recommended as a source of nitrogen in this experi- 

 ment because it is more suitable for mixing with Superphosphate and Muriate 

 of potash, and all the fertilizers can be applied in one operation. 



The results of a "Five Plot Experiment" show whether a complete mixture 

 of nitrogen, phosphoric acid and potash, or a mixture of any two of these 

 ingredients is most profitable in the proportions used. The leaving out of nitrogen, 

 phosphoric acid and potash in Plots 3, 4 and 5, respectively, will also show which 

 of these constituents is most needed for that particular soil and crop. The pro- 

 portions in future applications can thus be adjusted so that the plant food most 

 needed for the same soil and crop will suitably predominate in the mixture. 



In every case, however, the main principle of the successful use of fertilizers 

 should not be forgotten, namely, Fertilizers cannot tal'e the place of Farmyard 

 Manure hut are merely to supplement its deficiencies in supplying the right 

 proportion of available plant food. Never discard Farmyard Manu/re for the use 

 of fertilizers entirely, hut, ivhenever possible %ise the two together. If Farmyard 

 Manure cannot be obtained every effort mmst he made to supply organic matter 

 by means of catch crops plowed in as green manure. 



MIXING OF FERTILIZERS. 



From: what has been said it will be realized that as the farmer's knowledge of 

 fertilizers increases, especially through experimenting, the more he will desire 

 to apply fertilizers according to the requirements which he finds necessary in 

 his own practice. He will naturally prefer to use the simple fertilizers and to 

 make up his own mixtures in the proportions which his experiments demonstrate 

 to be most profitable. In some instances he may find that an application of only 

 one or two plant food constituents produces the greater profit. Very often the 

 expensive nitrogenous fertilizers can be economically dispensed with. This is 



