Mineral nitrogenous materials gave greater increases than did organic N on both limed and unlimed sections. The greatest increase (4000 lbs. per yr.) was with a combination of NaNO3 and manure but this was obtained with a great loss of N. Where the nitrogenous fertilizer has been discontinued for a period of 5 yrs., there are still increases in yield over check plots, but these increases are generally less than the increases at the close of the 3rd 5-yr. period (1918-22). In general where the N treatment has been heavy, the percentage of N in the dry matter has been increased. The percentage of N recovered is irregular, due to a number of factors, but the average recoveries for the limed section are in most cases only a little above those of the unlimed. On plots where lime, phosphate, and potash have been used freely, with a limited supply of available N, volunteer clover comes in with grain and hay, although none has been seeded. This has materially affected the results on some of the N starved plots. With the exception of those plots that receive rather extreme treatment, the percentage of N in the soil has not changed much since 1913. The average percentages of N in the soils of the limed sec tion are distinctly lower than the averages for the unlimed. Loss of N is greater from the lime treated plots than from those without lime. The average pH value for the unlimed soils in 1927 was 5.5 and for the limed soils 7.0. Where NaN03, Ca(NO3)2, and Ca(CN)2 have been used the pH value is higher than the general average; where (NH4)2SO4 has been used with lime the pH is below the general average for the limed section.