EXPERIMENT STATION BULLETINS. 



I«j7 



A COMPARISON OF STAPLE MANURES WITH OTHER FERTILIZERS. 



This experiment lias been in progress for three years, the same fertilizers being applied 

 every year. The first seeding in 1901 gave no promise of a complete stand and was 

 harrowed up and reseeded on June 8. The condition of the ground, favorable season for 

 growth of sugar beets, and the excellent care of the Held ought to have given a larger 

 yield than was realized iu 1901. The only cause than can be offered for the poor growth 

 is the fact that the seed was sown so late. The ground is a sandy loam, very uniform 

 in character, though not typical ground for growing sugar, beets. The reader is referred 

 to the comparisons for his conclusions rather than to the yield itself. Here as in soil 

 test experiment referred to on page 19C>, we find the barnyard manure giving tbe lowest 

 average per cent of sugar, although the tonnage is nearly the highest. Plot 17 received 

 a dressing of one ton of lime per acre in 1901, while plots 18 to 22 were discontinued 

 after 1900. 



The special features of the following table will be brought out by comparisons in 

 smaller tables made from these and others wherein the inlluenee of lime, various forms 

 of nitrogen, and the advantage of home mixed and commercial fertilizers will be more 

 fully explained. 



Tabic showing the effect of air-sluked lime on the growth and sugar content of beets. 



Fertilizers. 



Average 3 nothing plots. 

 < ommercial fertilizer... 



Home mixed fertilizer (Nitrate Nitrogen). . . 

 Home mixed fertilizer (Ammonia Nitrogen). 



Totals 



Uulimed. 



Yield 

 per acre. 



Tons. 



7.00 

 7.15 

 8.24 

 7 05 



30.34 

 7.59 



Sugar 

 in beets. 



Per cent. 



13.79 

 13.07 

 14.09 

 14.19 



13.93 



Sugar 

 per acre, 



Pounds. 



1,930 

 1,945 

 2,323 

 2,255 



8,453 

 2,113 



In favor of lime, tons of beets 



In favor of lime, pounds of sugar per acre. 



Limed. 



Yield 

 per acre, 



Tons. 



7.45 

 8.09 

 9.39 

 7.79 



32.72 

 8.18 



.59 



Sugar 

 in beets. 



Per cent, 



13.45 

 13.04 

 13.43 

 13.19 



13.28 



Sugar 

 per acre. 



Pounds. 



2,003 

 2,111 

 2,524 

 2,176 



8,814 

 2,204 



91 



The unlimed plots in every case produced beets richer in sugar. 



Woll in Wisconsin Experiment Station Bulletin No. 71 found that lime increased 

 the percentage of sugar in six cases, and decreased it in two. but that there was no 

 difference in the average results in favor of lime. 



