HOW TO GROW GOOD COllN. 



207 



1. TABLE OF RESULTS OF EXPERIMENTS AT ROTHAMSHEAD, BY 

 MESSRS. LAWES AND GILBERT. 



Manures used every year. 



Unmanured every year 

 Ammonia salts alone 

 14 tons Farmyard manure . . 

 Unmanured every year 

 Mixed mineral manure alone 



Ammonia salts alone 



Ammonia salts and mixed ) 



mineral manure \ 



14 tons Farmyard manure . . 



20 years, 1844-63. 



19 years, 1845-63. 



20 years, 1844-63. 



12 years, 1852-63. 



A glance at this table shows us the wonderful re- 

 sults of continuous manuring for the soil operated 

 upon; we might, however, expect that, though the 

 general conclusions would probably not greatly vary, 

 yet that there wo aid not be absolute uniformity in 

 these respects in different soils and districts. 



2. On the Quality and Quantity of Seed-corn. — It 

 seems to be generally concluded that a thin seed, 

 from poorer soil, should be preferred for land of a 

 better quality ; but our own experience would lead us 

 to look for seed from as great a change of soil as pos- 

 sible, and to procure therefrom not a poor, but as good 

 a sample as we could. We should, however, look for 

 our seed, not from a richer soil or a warmer climate, 

 but the reverse. Oats, for example, as previously 

 shown, degenerate, even to wild ones, if the poor seed 

 be brought from a poor, cold soil, to be cultivated in 

 land still poorer. We, however, on our farm, sowed 

 oats during the past season weighing 481b. per bushel 

 on a sandy soil ; and, although our return was not so 

 large in bushels as though we had sown black oats, 



