377 



Thero was a differenee of 8 per cent in the water in the tieM-fure«l hay [from dif- 

 fereiit phits.] - >f * This emphasizes the fact that eoiieliisions far from true may 

 be drawn from tield weigliings without the ad<litioual knowledge of the water con- 

 tent of tlH^ crop. 



The application of nitrogenous fertilizers increased the percentages of protein in 

 the grasses, and somewhat in proportion to the amounts applied. This is in accord 

 with observatious made by the station upon the relation of the protein in maize 

 (corn and stover) to the nitrogen applied in the fertilizers. * "" * 



The increase in the amount of nitrogen in the crop did not ecinal the increased 

 amount of nitrogen supjdied in the fertilizers, implying that the plants were not 

 able to avail themselves of all the nitrogen su^jplied. 



Cooperative field experiments ayith fertilizers, C. S. 

 Phelps, B. S. (}»]). 57-02).— Tliese experiments were of tliree kinds, 

 soil tests, special nitrogen experiments, and special corn exi^erinients. 

 The fertilizers were in all cases snpplied by the station, and in most 

 cases the more im])oit;int details of the experiments were carried ont 

 nnder the snpervision of a representative from the station. 



*S'o// tests with fertilizers for corn (pp. 62-71). — These were on four 

 different farms and at t\\Q station, each experiment inchuling- 10 tenth- 

 acre plats. On these, nitrate of soda 100 ponnds, dissolved boneblack 

 320 pounds, and muriate of potash 160 pounds per acre were used singly, 

 two by two, and all three together; x>la8ter 400 ponnds was used on 

 1 plat and 2 remained unnmniued. In the experiment at the sta- 

 tion 2 extra plats were added, 1 of which received stable manure 

 16,000 pounds, and the other stable manure 12,000 pounds, with dis- 

 solved boneblack 320 pounds per acre. Other slight deviations from 

 the above plan occurred. The soils represented were mostly loam, 

 ranging from light to clayey. In two cases similar experiments had 

 been made on the same soil the i)revious year. 



The results of the trial on each farm are tabulated, the yields all 

 being calculated to a water content of 11 per cent. The indications were 

 that the soil of one farm needed both potash and nitrogen, and that 

 one especially needed potash, one nitrogen, and one phosx)horic acid. 

 The results at the station were not conclusive, the soil proving uneven. 



Special nitrogen experiments (pp. 71-74). — Exi^eriments were made on 

 two farms on the same general ])lan as the one with grass at the station 

 described above, except that dried blood was added, being used in the 

 same manner as the other nitrogenous fertilizers. Potatoes were grown 

 in one case and oats in the other. The tabulated results show no very 

 definite mdications in either case, both soils proving rather uneven. 

 "The oats responded quite markedly to nitrogen." 



Special corn experiments (pp. 75-02). — "This class of experiments was 

 X^lanned for the purpose of studying the best proportiims of phosphoric 

 acid and potash for use in growing corn on soils whose peculiarities had 

 already been studi'ed by means of 'soil tests.' In addition, the profit 

 or loss from the use of the mixtures was also considered." 



Four of these experiments were made, the soils being medium-comi)act 

 loam, a clay loam, and a tine light loam. Each experiment included 10 



