12 X. H. EXPERIMENT STATION [Bulletin 320 



clover there when proper fertility conditions are maintained for its 

 sustenance. 



The responses for complete fertilizers in Livingston pasture are 

 therefore proportionatelv higher than in Seavey as indicated in 

 Table 11. 



The treatments listed in Table 11 were all applied annually in con- 

 trast to the triennial superphosphate and potash application on most 

 of the plots of Seavey pasture. This means, of course, that three 

 times as much phosphoric acid and potash have been applied on Liv- 

 ingston as on the Seavey plots. Unless one had seen the plots to 

 observe how they react this might lead to the conclusion that these 

 heavier applications would be responsible for the differences in 

 amount of clover on the two fields. The response in clover is so 

 distinct and immediate on the Livingston field after superphosphate 

 and potash are applied that the difference cannot be accounted for in 

 this manner. Rather it must be due to slower availability of one or 

 the other of the elements on Livingston, coupled with the better 

 moisture relations of the soil, which, when conditions are right, per- 

 mit maximum crops of wild white clover. 



A comparison of Tables 9 and 11 indicates how much better Liv- 

 ingston pasture responds to complete fertilizer than to nitrogen 

 alone. The maximum yields of dry matter and protein with nitro- 

 gen are 2339 and 437 pounds, respectively, whereas the top treat- 

 ments with complete fertilizers returned 3543 pounds of dry matter 

 and 667 pounds of protein per acre, an increase of more than 50 per 

 cent. 



The average yields of all nitrogen plots and of all complete fertil- 

 izer plots of Livingston pasture are presented here for comparison : 



I'm'.ik r_V /' • ,  averagt n'nh]. [jvingston pasture 



Pound- pi r acre Gain over check 



Treatment Dry matter Protein Dry matter Protein 



50 lbs. nitrogen per acre annually 2048 .^>V; 



50 lbs. nitrogen with 100 lbs. 



each of P^O, and K-,0 



annually 3391 632 1343 249 



i he gain reincbeiu> an iiKrra>c- <m <jr per cent for ihe complete 

 over the nitrogen treatment. It should l^e remembered here that 

 equal quantities of nitrogen were applied in all cases. 



Fertilizers Without Nitrogen 



A rather elaborate system of top-dressing with super])hosphate 

 and potash has been contluctcd on Seavey while on Livingston pas- 

 ture only a limited amount of work in this respect has been done. 



Table 13 gives the yields for various phosphoric acid and potash 

 treatments on .Seavey pasture, alone, and in combination. 



liasic slag. Plot 1. has proved to be a better carrier of phosphoric 

 acid than superphosphate in this test, either because the phosphoric 

 acid from this compound holds its availability for a longer period or 



