850 



trials with sweet corn the yield was somewhat reduced when the tassels were 

 removed. 



Removing the tops by cutting them off above the ears just before the leaves 

 began to turn brown had no appreciable effect upon the yielrl of grain. 



Summary of experiments with corn (i)p. 50,51). 

 In 1891, 36 varieties were tested on 52 plats. About 86 per cent of a full stand of 

 stalks was secured. About 12 per cent of the stalks prodnced no ears. This is nearly 

 the same result as found in 1888 and 1890. In 1889 there wa« less than 2 per cent of 

 barren stalks. While the percentage of stalks does not seem to depend on variety, 

 there were great differences in different plats — from 3 to 29 per cent. 



As had been the case in each of the 3 preceding years, the varieties maturing 

 about September 20 gave a larger average yield than those maturiug either earlier 

 or later. In 1891, 13 early varieties averaged 56, 19 medium averaged 66, and 6 late- 

 maturing varieties averaged 57 bushels of air-dry corn per acre. For Ihe 4 years 

 the early varieties gave an average yield of 61, the medium 7.3, and the late 68 bushels 

 of air-dry" com. 



For 4 successive years 11 varieties have been tested. The average yield has 

 been at the rate of 70 bushels per acre. Of these varieties Champion White Pearl 

 has had the highest average, 79 bushels; Learning (yellow) the next, 76 bushels; 

 Burr WTiite, which resembles Champion White Pearl, next, 74 bushels. Boone 

 County White gave much the largest yield, 89 bushels, in 1891, and as large as any 

 other in 1890. Leaming gave the largest yield of any yellow variety in 1891. Mnr- 

 dock and Edmonds stood highest in yield of the e.arly-maturing varieties tested for 

 4 years. A plat of Murdock did not ripen until September 20, while 1 plat of Leam- 

 ing matured so as to be classed with the early varieties; but these were exceptional 

 cases. 



In some cases marked differences; were found in the yield of adjacent plats of the 

 same variety. In the case of 1 variety there have been extraordinary variations in 

 veld in ditlVreut years. In each of the 4 years varieties little known and without 

 more than a neighbcuhoud rcputiitiou have giv»'n large yields of good corn. The 

 vield does not seem to depend on the cohir or the smoothness or roughness of the 

 kernels, although in 1891, the white varieties gave an average of 4 bushels larger 

 yield tlian the greater jnimber of yellow varieties. 



A medium-sized variety of corn, i>lanted at the rate of one kernel each 9 to 12 inches 

 in rows 3 feet 8 inches apart, gave larger yields of good corn than thicker planting; 

 but the yield of corn and stalks together increases with tliickness of planting, at 

 least up to the rate of one kernel each 3 inches. As the result of 4 years' trials it 

 is believed the larger yield of grain makes the food value of the total crop greater 

 when it is planted at the rate of one kernel to about each 6 inches in the row. 



In 1891, little ditVerence was found in yi<'ld from plats ]ilanted with a medium- 

 maturing variety at weekly intervals from April 2."> to May 23. Later plantings gave 

 niu< h smaller yields; the ears were not well tilled, and the corn did not mature 

 thoroughly. For 3 years jtri-vions good croj>s were had from jdantings anytime 

 in May. For the 4 years the best results have come from i>lanling from May 11 

 to 16. 



In 2 out of 3 years no material ditVereme in yield has been lound, whether the corn 

 has been planted in hills or tlrills, if the land was kept equally free from weeds. 



The yicMs were nearly the same from 3 ]dats of spring-plowed land, one plowed 2, 

 one 5, and ime 10 inches deep. In 1890 land i)lowed 8 inches deep gave a little 

 larger yield than that plowed shallower. 



In 1891, for the first time in 4 years, there was a larger yield from a plat deep cul- 

 tivated than from one shallow cultivated. A cultivator with narrow spring teeth 

 was used this year in the deep cultivation, in former years a shovel cultivator. 

 For 4 years the average yields have been at the rate of 71 bushels from deep and 76 



