44 



HOOS FIELD 



HOOS FIELD 



Inoculation of Leguminous Plants 



Since the land on which potatoes had been formerly grown (see Plan 

 on page 42) is known to have carried no leguminous crop for the last 

 fifty years, it was decided to use those plots which no longer showed 

 much residue of the manures previously applied, i.e.. Plots 5-10, for testing 

 the comparative effects of different media for inoculating leguminous 

 plants with their appropriate bacteria. In 1905, therefore. Plots 6, 8, 

 and 10 were divided transversely into four plots ; on A, soil inoculated 

 with Hiltner's preparation from Munich; on B, soil inoculated with 

 Moore's preparation from the United States ; on C, soil from a field which 

 had carried red clover in 1904, were sown on 7th April ; D being left 

 uninoculated. Red clover seed was sown on 15th May over the whole 

 area, and was continued each year to 1911 inclusive; in 1912 a crop of 

 oats was taken. See yield in Table XX. 



Plots 5, 7, and 9 were similarly divided into three plots and sown with 

 cow peas ( Vigna catjang), a leguminous plant quite new to this land. On 



E, the seed was inoculated with Moore's medium just before sowing; on 



F, soil obtained from an old cow pea field in the United States was 

 spread; and G was not inoculated. The cow peas were sown on 16th 

 May, but failed to give a satisfactory plant, and were ploughed up. The 

 plots were sown with red clover in 1906, as part of a further trial of 

 the continuous growth of clover. This continued to 1911 inclusive; in 

 1912 oats were grown on the plots. For results, see Table XX. 



Table XXl.—Fxperiments on Wheat, alternated ivith Fallow, without Manure 

 {Hoos Field), 62 years (1851-1912) ; and grown continuously without Manure 

 {Broadbalk Field), 62 years (1851-1912). 



Average produce of Grain per acre, and Produce last two years, 1911 and 1912. 



