557 



Jndijjod by tlie resnlts, 1888 was m.-nsiially t':ivoial)lo for tlif> corn crop, 18S9 nincli 

 less favorahlf, and 1890 still less tlian IH-*!). The yield of air-dry corn per acre from 

 ilio medium niatnring varieties for the three years was 'JO, 75, and (J2 bushels 

 rt's]iectively. 



In 1881) the rain-fall was unfavorably distributed, and the temperature was below 

 normal; in 1890 the rain-fall was very dclicient, but the temperature was more 

 propitious durinj^ the corn months. 



Experiment No. 1. — Corn, test of varieties (pp. 392-404). — The varie- 

 ties tested in 1890 included 28 yellow dent, 13 white dent, 1 mixed 

 dent, 1 Hint, and Brazilian Hour corn. The results, as in the case of 

 the similar experiments previously reported, are given in detail in 

 tables, with summaries, general notes, and a meteorological record of 

 the growing season of 1890. 



Experiment No. 3.~Corn, time of planting (pp. 405-407). — In 1890 

 corn was planted at seven ditierent dates at intervals of a week, from 

 April 28 to June 9. The details and results are stated in tables giving 

 dates of planting and cultivation, implements used, yield of corn, and 

 per cent of water in corn. 



Experiment No. 4. — Corn, depth of plantinfj (p. 407). — May 8, 1890, 

 six rows, each 6 rods long, were planted at depths varying from 1 to 

 inclies with Burrs White corn, four kernels to the hill. The yields are 

 reported in a table and compared with those for 1888 and 1889. 



Experiment No. 5. — Corn, thickness of plantinrj (pp. 407-415). — In 

 1890, as in previous years, " this experiment was conducted to determine 

 not only the best thickness at which to plant corn, but also the best 

 manner of distributing the seed at a given thickness, whether, for 

 instance, to plant three kernels every 42 inches or one kernel every 14 

 inches." Burr's White corn was planted "at six different degrees of 

 thickness as follows: 47,520, 23,700, 15,810, 11,880, 9,504, and 5,940 

 kernels per acre." Tables show for each planting the number and 

 weight of stalks and ears harvested ; the yields of fodder, stover, and 

 shelled corn, and pounds of stover for each pound of shelled corn, in 

 1888, 1889, and 1890; detailed data for 1890; and the yield of dry mat- 

 ter and digestible substance per acre in 1890. 



Experiment No. 6. — Corn, planting in hills or drills (p. 415). — Three 

 plafs, containing 0.433 acre each, were planted with the same quantity 

 of Burr's White corn, one plat in drills and the other two in hills. One 

 of the plats planted in hills was cultivated both ways, the other two one 

 way. The yields of shelled corn in bushels per acre, as stated in a 

 tal)le, were G0.8 on the plat planted in drills, 71.7 on the plat planted in 

 hills and cultivated one way, and 77.7 on the plat cultivated both ways. 



Experiments Nos.^,Q, and 10. — Frequency and depth of cultivation and 

 root pruning (pp. 416-423).— In 1890, as in previous years, these were 

 practically one experiment with three sets of conditions. In No. 8, in 

 which the effects of frequency of cultivation were tested, the com- 

 parison was between cultivating four times (ordinary cultivation), five 

 times (ordinary cultivation, and once after tasseling), and thirteen times. 



