144^ CHKEAI.S AND PUI.SE CROPS 



The use of acid phosphate and manure has increased the yield 40.58 bushels, 

 thus leaving 9.31 bushels to be credited to the acid phosphate. 



3) On such acid soils as are found on the Station farm at Wooster, 

 one ton of burned lime , or two tons of ground limestone, applied once in 

 5 years, has increased the yield of corn on an average 7.35 bushels per 

 acre on the fertilised plots and 8.25 bushels per acre on the unfertilised 

 plots.Taking into consideration all the crops of the rotation, the appli- 

 cation of lime has been worth, on the average, € 2 18 s o rf (0 S i4-2i) per acre 

 per rotation, the cost of the lime being £ i is od. ($ 5). 



4) Comparing very deep ploughing (15 ins) with ordinary- ploughing 

 (7 Iq i'^s) and with subsoiling (carried out by running an ordinary' subsoil 

 plough in the bottom of the ordinary furrow for an extra depth of 7 \.y- 

 inches), the 5 year average gain for subsoiling has been 2.32 bushels per 

 acre and for the deep ploughing, 0.43 bushel per acre, compared with the 

 quantities obtained with ordinary- ploughing. 



5) Plantings of maize made at Wooster from May 4 to 10 have a 

 given larger yields of shelled corn per acre than the plantings of other dates, 

 though the moisture content and the shrinkage have been lower for the 

 plantings made from April 24 to 29. Of the plantings of the latter dates, 

 78.62 lbs of ears as weighed in November have been required to equal a 

 bushel of shelled corn in April, whileof the planting of June 2 to 6, 91.95 lbs. 

 of ears have been required. The variety of corn and all the conditions of 

 growth except date of planting have been the same. 



6) Where the distance between rows (42 ins.) and the number of 

 plants per acre (12 446) have been the same, one plant every twelve inches 

 has outyielded 3 plants every 36 inches (in hills) by 4.55 bushels per acre. The 

 produce obtained from isolated plants and from those grouped in hills of 2,3 

 and 4 respectively was : — grain, 46.88 ; 46.28 ; 42.33 ; 42.85 bushels per 

 acre ; stems (stover), 2 827 ; 2 417 ; 2 168 ; 2 180 lbs. per acre. 



7) With hills 42 inches apart each way, the maximum yield of 

 shelled corn, as a 10 year average, has been secured from 4 plants per hill 

 or 14.220 plants per acre. 



8) Nine years tests of deep (4 ins.) as compared with shallow (i \(, in), 

 cultivation show an average gain of 4 bushels per acre in favour of shallow 

 cultivation. The average crops have been respectiveh' : — grain — 56.4 ; 

 60.4 bushels per acre ; stems — 2 691, 2 874 lbs. per acre. 



9) Two years' tests of three late cultivations of corn (in July and 

 August) with a one-horse cultivator, after the ordinary cultivation had 

 been carried out with a two-horse implement (five cultivations in June 

 and early July) show an average gain of 3.44 bushels per acre for late cul- 

 tivation. 



10) A 10 year average variation of 6.25 bushels per acre has been 

 found in varieties of corn well acclimatized to the locality where tested. A 

 variation in 3deld of 34.29 bushels per acre has been found in varieties grown 

 and sold for seed within the state of Ohio. 



11) A comparison of ears varying 2.44 inches in length, on the 

 average shows a difference in yield of only 1.39 bushels per acre, as a 10 



