Results in Different Localities Compared. 



57 



description of soil and of one locality only. Table XII., 

 however, summarises the results of experiments made on 

 very various soils, under various conditions due to previous 

 treatment, and in various seasons, notwithstanding which the 

 general characters of the results are seen to be accordant. 



TABLE XII. RESULTS OF EXPERIMENTS ON THE GROWTH OF WHEAT 

 BY DIFFERENT MANURES, ON DIFFERENT SOILS, IN DIFFERENT 

 LOCALITIES, AND IN DIFFERENT SEASONS. 



Dressed grain per acre bushels. Average annual 

 results. 



* By amm.-salts = only 431b. of nitrogen. 



Thus, not only is there general agreement in the character 

 of the results in different localities, when the averages of a 

 number of years are taken, but the non-effect of the residue 

 from previous applications of ammonia-salts is as marked in 

 the sandy soil at Woburn as in the very different loamy soil 

 at Eothamsted. This latter point is illustrated in Table XIII. , 

 which shows the produce of wheat grown year after year on 

 the same land in Stackyard Field, Woburn. 



This field received mineral manure and ammonia- salts 

 (= 861b. of nitrogen) for five successive years, in the year 

 following which one portion again received the same manure, 



