326 Rereortr oF THE HORTICULTURAL DEPARTMENT OF THE 
Jenkins and Britton’ continued the experiments previously 
noted and found that, on the coal-ash and peat-moss soil, 1.8 
grams nitrogen, .556 gram phosphoric acid and 3.03 grams 
potash per square foot gave as good results as larger amounts. 
This is equivalent to 1079 lbs. nitrate of soda, 320.4 lbs. dis- 
solved bone black and 582.8 lbs. muriate of potash per acre. 
The mixture of coal ashes with 5 per ct. of peat moss gave larger 
yields than coal ashes alone, but was not equal to mixtures 
containing 9 to 12 per ct. of moss. None of these mixtures 
gave as much or as good lettuce as compost soil (sod and manure 
rotted) with the same amounts of fertilizers. Head lettuce and 
loose lettuce gave the best results on rich compost soils without 
either lime or chemical fertilizers. ‘The results on the limed 
plats were better than on the chemical fertilizer plats. 
In 1900 these authors’ report much better crops from compost 
without chemical fertilizers than from the coal-ash and peat-moss 
mixtures with such fertilizers. On this artificial soil nitrogen in 
ground bone gave best results; in cotton-seed meal, poorer 
results, and in nitrate of soda poorest results. The authors 
believe that the poor texture of both the coal-ash and peat-moss 
mixture and the compost make it impossible to produce on them 
lettuce of the best quality. The character of the compost is 
not given. 
Stuart,? in the winter of 1896-7, used chemical fertilizers in 
growing lettuce on a black loam soil unfertilized for several 
years and believed to be quite deficient in plant-food. Diiferent 
plats were supplied liberally with muriate of potash alone or 
in combination with either or both dissolved bone black and 
nitrate of soda. A loose lettuce, Grand Rapids, was grown on 
all plats. The watering was by sub-irrigation. The muriate 
alone or with nitrate of soda gave unfavorable results, as in 
tests of Maynard and Goessmann; but the muriate with dis- 
solved bone black gave a marked increase in the crop. The 

‘Jenkins and Britton. Conn. State Exp. Sta. Rept. 1899:224—226. 
*Conn. State Sta. Rept. 1900: 298-301. 
*Stuart, Wm. Ind. Sta. Bul. 66 (Oct., 1897). 
