268 



WHAT MANURES TO APPLY. 



able for the cultivation of arable than grass lands, for the plow 

 mixes it with the mass of the soil. It pays better, especially on 

 sloping lands, to apply a little manure frequently than much 

 manure at greater intervals." Some grasses draw much more 

 potasli and phosphoric acid than others. Here are two mixtures 

 in which the re(|uirments of potash and phosphoric acid greatly 

 differ. Tlie tables are from Mr. Julie: 



FIRST mixti;ke. 



POTASH. 



PHOSPHORIC ACID. 



In 1,000 lbs. 

 Lolitini i>crenne 6.75 



Phalaris hh'uatre 5.08 



.^^l vena flu vescens 5. 98 



AnthoMintJiiini oduratuvi 6.85 



Fesfnca pni teima 5. 52 



I 

 Bromnii Sdiraderii 8.07 ! 21.55 



In 1,000 lbs. 

 .... 36.:} 



.... 31.4 



26.55 



.... 25.89 



.... 21.83 



Mean or average 6.375 ; 27.256 



SECOND MIXTUUE. 



Poa. nemoraltH 4.12 | 10.85 



BrotnuK jirdfcusis 3.62 13.59 



Poa pratensis. 4.43 15.24 



Cyuosnnis cristafns.. 3.72 [ 15.24 



Fest iim rubra 3.34 | 16.37 



Phk'iim pratense 4, . i 16.01 



Mean <ir average 3.893 14.05 



It will be seen that the average of the second n;'"ture is only 

 about half as exhaustive to the soil as tlie first in producing the 

 same amount of hay. 



In 1858 Mr. Lawes said: " The best artificial manures for 

 grass land are Peruvian guano, and nitrate of soda and sulpliate 

 of r.mmonia." In 18T5 lu^ wrote: " I am disposed to think a 

 dressing of dung once in five years and 2 cwt. of nitrate of soda 

 the other four is about as good an application as can bo used. 

 Peruvian guano, when alone, may be used at the rate of 150 or 



