30 



MASS. EXPERIIMENT STATION BULLETIN 281 



Table 6. — Treatments of Experiment B 



Plot Fertilizer Plot Fertilizer Plot Fertilizer 



treatment treatment treatment 



IP 5 2K 9 2P, 2K 



2 K 6 Check 10 Check 



3 Check 7 Gypsum 11 P, K, N 



4 2P 8 P, K 



Lime was applied to east half of each plot twice, 1921-22 and 1928. 



N — Chilean nitrate of soda 160 pounds per acre 



P — superphosphate (16% P2O5) 480 pounds per acre 



K — muriate of potash 80 pounds per acre 



Gypsum 480 pounds per acre 



Lime, as ground limestone 2400 pounds per acre 



Check — nothing added 

 Each treatment was replicated 6 times, making 66 plots (1 rod x 2 rods) in 6 series. Dates 

 of application of fertilizer were as follows: 



Series III: S 1922, S 1923, S 1926, S 19.30 , . . 



Series IV: F 1921, S 1923, S 1927*, S 19.30 ^ applications 



Series I: S 1922, S 1923, S 1927*, S 1928, S 1930 

 Series VI: F 1921, S 1923, S 1927*, S 1928, S 1930** 



5 applications 



Series II: F 1921, S 1923, S 1924, S 1925, S 1926, S 1930 

 Series V: S 1922, S 1923, S 1924, S 192.5, S 1928, S 1930** 



S — Spring 



6 applications 



F— Fall 



*In 1927 all treatment consisted of muriate of potash (160 pounds per acre) applied to all 

 plots of Series I, IV and VI, except the check plots (3, 6 and 10); and nitrate of soda (160 pounds 

 per acre) to plot 11 of the same series. 



**By mistake plot 10 of Series V and VI received fertilizer which should have gone to plot 11. 



Table 7. — Percentage Rating of Plots of Experiment B, June, 1923 



Series I, II, III, V, and VI 



Plot Fertilizer Treatment Lime No lime 



1 P 25 12 



2 K 53 28 



3 Check 32 17 



4 2P 26 15 



5 2K 61 30 



6 Check 31 13 



7 Gypsum 28 21 



8 P, K 61 39 



9 2P, 2K 72 47 



10 Check 47 23 



11 P, K, N 57 35 



Table 8. 



-Yield and Chemical Composition of one Clipping of Grass from 

 Experiment B, 1923 

 (Pounds per acre and percentages.) 



DRY M.A.TTER 



PROTEIN 



ASH 



