April, 194:] PASTURE TOP-DRESSING IN N. H. 11 



nitroo-en alone results had shown rather wide dilTerences for differ- 

 ent nitrogen carriers. 



The increase for the cyananiid, basic slag, muriate of potash com- 

 bination is interesting in view of the relatively low response for the 

 use of cyanamid alone (Table 8). When balanced with phosphoric 

 acid and potash this treatment actually gave slightly higher dry mat- 

 ter yields than other "complete" fertilizer treatments and made a 

 very good showing in protein increase. (It should be pointed out. 

 however, that this material should not be mixed with other fertil- 

 izers in the amounts specified but should be applied separately. The 

 same may be said of basic slag phosphate.) 



With respect to these complete fertilizers one might almost con- 

 clude that so far as different materials are concerned it makes 

 no difference what the source, so long as equal amounts of plant 

 food are applied. This statement appears to be verified by results 

 on the plot which had but 156 pounds of nitrate of soda annually, al- 

 though this plot did receive equivalent amounts of superphosphate 

 and potash, applied annually, and not in a large triennial application. 

 The response secured under this treatment is in the same relative 

 proportion as the half application of nitrate of soda. (Table 6). 



Perhaps the most noteworthy thing about the figures from Seavey 

 i»asture may be brought out by comparing Tables 8 and 10, a study 

 of which reveals how little stimulation has been secured from com- 

 plete fertilizers over that from nitrogen alone. The average total 

 yield from the four complete fertilizers has been 2538 pounds of dry 

 matter and 447 pounds of protein per acre while the three nitrogens 

 have yielded an average of 2476 and 429 pounds, respectively, of dry 

 matter and protein. The differences between these values are not 

 wide enough to be significant. 



This similarity of response is due primarily to the soil and to its 

 lack of ability to support a good stand of wild w^hite clover with the 

 grasses that are present. Wild white clover does appear in the 

 plots to some extent, depending upon treatment, but in no plot does 

 it assume the importance in the sward that it does in the Livingston 

 pasture, where under treatment with phosphoric acid and potash 

 wild w^hite clover abounds. 



Seavey pasture, in other words, is not unlike the grass pastures 

 listed earlier in this publication and the Livingston pasture would 

 certainly qualify as a clover pasture because of the importance of 



Table 11. — Five year average yield, Livingston pasture 



Pounds per acre Difference from check 



Plot No. Treatment Dry matter Protein Dry matter Protein 



9 and 16 8-16-16, 625 lbs. annually 3543 641 1873 385 



13 Ammo Phos, 11-48-0. 200 lbs. 



Nitrate of potash, 13-0-44, 

 220 lbs. 3469 663 1799 407 



Nitrate of soda, 156 lbs. 

 18 Sulphate of ammonia, 125 lbs. 



0-20-20. 500 lbs. 3379 667 1709 411 

 1,8. 14, 19 27 checks, no treatment 1670 256 



