cleaux mixture for blight. 



140 MAIXE AGRICULTURAL EXPERIMENT STATION. I903. 



ARRANGEMENT OF PLOTS INT FIELD. 



East Side of Field. 



1 Rose. 



2 Early Michigan. 



3 Hulett's Rust Proof. 



4 Mill's Mortgage Lifter. 



5 Green Mountain. Three rows each. Paris green applied 



6 New Queen. [ as spray to kill the potato bug. No treat- 



7 Polaris. fment for blight. 



8 Maggie Murphy. 



9 Irish Cobbler. 



10 Early Ohio. 



11 Gem of Aroostook. 



12 Bovee. 



13 Bovee. 



14 <Tem of Aroostook. 

 1.5 Early Ohio. 

 IH Irish Cobbler. 



17 Maggie Murphy. Three rows each. Sprayed with Paris 



18 Polaris. I green for the potato bug' and with Bor- 



19 New Queen. (< 



20 Green Mountain. 



21 Mill's Mortgage Lifter. 



22 Hulett's Rust Proof. 



23 Earlj' Michigan. 



24 Rose. J 



West Side of Field. 



The plot had an area of a little more than an acre. The land 

 had been in grass for several years and for the preceding two 

 seasons had been used as a run for growing chickens. The soil 

 is a rather heavy, fairly uniform loam, with a clay subsoil. It 

 was plowed about seven inches deep in the fall of 1902, and was 

 worked several times in the spring of 1903 with the Clark double 

 action cutaway harrow. Because of the unusual dryness of 

 April and ]^Iay the turf was not as well rotted and broken up as 

 usual or desirable. The top. however, was thoroughly pulverized 

 and would in ordinary seasons have proven a good seed bed. 

 The seed was soaked in formaline solution for scab before cut- 

 ting. About a bushel of each variety Avas used for seed. The 

 piece was planted about ^Nlay 12, 1903, six inches deep, with a 

 Robbins potato planter in rows 32 inches apart and 12 inches in 

 the row. A fertilizer carrying 3 per cent nitrogen, 7 per cent 

 available phosphoric acid and 4 per cent potash was applied in 

 the drill at the time of planting, at the rate of 1,000 pounds to the 

 acre. The stand was imperfect but differed greatly with the dif- 

 ferent varieties, ranging from almost no stand with the Xew 

 Queen to 2-3 stand with the Irish Cobbler and the Green ^fount- 

 ain. The stand with the different varieties as measured by the 

 number of feet to obtain 55 plants (hills) at time of digging was 

 as follows : — 



