240 



THE CEREALS IN AMERICA 



no maize was obtained. This experiment has been verified bj 

 the New Hampshire^ and Utah^ Stations. 



Plats were also cultivated from three to five times a season 

 in comparison with plats cultivated about three times as much. 

 The averages for five years are as follows : 



Bushels grain 

 per acre 



Shallow, ordinary . • , . • 70.3 



Deep, ordniary • 66.7 



Shallow, frequent . . . • • 72.8 



Deep, frequent 64.5 



Frequent, average . . • • 68.6 



Ordinary, average . . • . 68.5 



Eight other stations have found similar results, while th^ 

 Michigan Station found that frequent cultivation gave a yield 

 of twenty-five per cent more dry substance than infrequent 

 culture.^ 



No advantage has been found in cultivating maize after the 

 plant is three to four feet high, provided it is free of weeds 

 at that time; and cultivation to prevent subsequent growth cf 

 weeds has not materially increased the yield, and when cultivsr 

 tion was deep, has decreased it. 



314. Conservation of Moisture : Influence Due to Stirring the 

 Soil. — It has been shown that allowing the weeds to grow almos t 

 prevents the growth of maize; that when weeds are removed 

 no stirring of the soil gave better yields than deep stirring ; 

 while shallow stirring gave better results than either no stirring 

 or deep stirring, while finally stirring two or three times a week 

 gave about the same results as stirring once a week during the 



1 N. H. Bui. 71 (1900), p. 50. 



« Utah Bui. 66, p. 108. 



3 Okla. Bui. 63 (1898), p. 4. Ga. Bui. 58 (1902), p. 20S. Kan. Bui. 64 (189;), p. 

 233. OhioRpt. iSS8,p.87. N. H, Bui. 71 (1900), p. 51. So. Dak. Rpt. 1900 (E. S, 

 R.IT: 511). Mich. BuL 164, p. go. Wis. Rpt. iS94,p. 282. Md. BuL 62 (1899), p. ^95 



