52 



Dr, Stewart. Yes, very good cover crops. Many of them as 

 fine as could be. 



Member. Won't the roots get so near the surface in a few 

 years that the mulch and manure will not have much effect? 



Dr. Stewart. This has not occurred in five years. I would 

 not attempt to say what is going to happen in the next five. 



Member. What is the relative cost of the two ? 



Dr. Stewart. The cost of manure is usually much greater. 

 The commercial fertilizer that we are suggesting costs about $10.00. 



E. C. Tyson. When you speak of $10.00, do you mean $10.00 

 per acre? 



Dr. Stewart. Yes, $10.00 per acre. 



Member. The comparison in results between manure and fer- 

 tilizer is hardly fair. The manure would cost us about $30.00 in 

 place of $10.00. 



Dr. Stewart. Well, it is certainly not against the manure. 

 There is much more plant food in it. It is much in favor of the 

 manure, so far as that is concerned. 



Dr. Stover. Which one pays best according to your chart, so 

 far as your expenses are concerned and the results obtained? 



Dr. Stewart. So far. I should say that in general we have a 

 good deal more net gain out of a properly compounded fertilizer. 

 The net results thus far have been greater. 



Relative Values of Fertilizers in Tyson Orchard. 



The relative values of the different fertilizer elements as indi- 

 cated by the results in the Tyson experiment, No. 215 are of con- 

 siderable local interest, hence the yields in this experiment are given 

 separately. They are shown in Table \ll for the last four years, 

 the fertilizers having been applied first in 1907. 



Table VII. Yields ix Fertilizer Experiment 215. (In Tvsou 



Orchard). 



(Yields in pound per plot, 1908-11.) 



Per Cent. 



Plot Treatment 



1 Check, 



2 Nitr. & Phos. 



3 Nitr. & Potash, 



4 Check, 



5 Phos. & KCl 



G Phos. & K2SO4, 



7 Check, 



8 Comp. Ftlzr., 



9 Nitrogen, 



10 Check 



11 Acid Phos., 



12 Raw Phos., 



1?. Check, 



14 Manure, 



15 Lime 



16 Check, 



1908 



1909 



1910 



1911 



Totals 



Benefit 



14 



95 



346 



2,053 



2,508 





26 



73 



301 



2,277 



2,677 



16.3 



43 



115 



418 



3,043 



3,619 



72.6 



21 



54 



260 



1,555 



1,890 





26 



146 



476 



2,828 



3.476 



78.0 



61 



179 



483 



2,352 



3,075 



52.8 



18 



45 



235 



1,777 



2,075 





21 



74 



300 



2,885 



3,280 



64.4 



17 



83 



239 



1,746 



2,085 



8.9 



17 



89 



150 



1,579 



1,835 





3 



43 



153 



1,359 



1,558 



—18.5 



4 



62 



164 



2,010 



2,240 



12.6 



31 



46 



103 



1.886 



2.066 





15 



52 



190 



2,333 



2,590 



24 2 



27 



86 



186 



1.765 



2,064 



—1.9 



10 



76 



115 



1,922 



2,123 





Total fruit involved, last 4 years 39,161 lb. 



