FIELD EXPERIMENTS WITH FERTILIZERS. 



139 



reported as if obtained from sections one twenty-fifth acre each. 

 The early white variety of soy beans has been regularly grown 

 in this experiment since 1895. Only the seed has been taken into 

 account in discussing the results with this crop, as most of the 

 leaves drop off before the seed matures, leaving only the coarse 

 stems as straw. 



The amounts and cost of the fertilizer per acre, the yields of 

 seed per section and the estimated yields per acre are shown in 

 Table 71. The percentages and amounts of protein in the dry 

 matter are shown in Table 72. 



The amou7its of the fertilizer and the total yields of the crop. — 

 The results given in Table 71 indicate the effects of the nitro- 

 gen of the fertilizer on the yields of seed. The smallest yields 

 were of course obtained on the sections without fertilizers. The 

 yields on the sections supplied with mineral fertilizers were 



Table 71. 

 special nitrogen experiments on soy bean seed. 



Weight and cost of fertilizers per acre, total C7'op, and increase of 

 crop over that of the 7iothing plots. 



Fertilizers per Acre. 



Kind. 



Nothing, - - - . 

 Mixed Alinerals, as No. 60', 

 Nitrate of Soda (25 lbs. N.), 

 Mixed Minerals, as No. ba. 

 Nitrate of Soda (50 lbs. N.), 

 Mixed Minerals, as No. ba. 

 Nitrate of Soda (75 lbs. N.), 

 Dis. Bone-Black, \ Mixed 

 Mur. of Potash, \ Minerals, 

 Mixed Minerals, as No. 6^, 

 Sulph. of Am. (25 lbs. N.), - 

 Mixed Minerals, as No. 6(7, 

 Sulph. of Am. (50 lbs. N.), - 

 Mixed Minerals, as No. 6^7, 

 Sulph. of Am. (75 lbs. N.), ■ 

 Nothing, . - . . 

 Mixed Minerals, as No. 6«, 



Lbs. 



480) 

 160 [ 

 480? 

 320 f 

 480 (^ 

 480 i 

 320 \ 

 160 \ 

 480; 

 120 f 

 480 

 240 

 480 

 360 



9.64 



13.14 



16.64 



6. 14 



10.27 



14-39 



18.52 



480 6.14 



n CO 

 > p. 



Bu. 



8.2 



10.3 



9.9 



4-4 

 6.9 



5.7 

 4.0 



5.7 



