FIELD CROPS. 



719 



"As a basis of comparison it was determined that with a single exception all the 

 aitilicial fertilizers should have the following composition : 



Pounds 



Nitrocen 



lMi()s])li(irie acid (available) 

 Potash (water soluble) 



95 

 155 

 155 



"This corresponded to the composition and quantity recommended for use in the 

 case of one of the most poi)ular tohacco manures." 



This formula was of necessity not strictly followed in 1893. The fer- 

 tilizers used cost at retail prices $27.22 to $.41.77 per acre. 



At Donegal the ex]jerimeiit occupied 20 twentieth-acre plats and at 

 Eocky Springs 10 twentieth-acre plats, using duplicate plats in both 

 localities. 



At Donegal the soil was a limestone clay; the surface soil was 6 or 7 

 in. deep, and the subsoil a heavy yellow day. Drought obscured 

 the results. However, phosphoric ncid appeared to increase the yield 

 of leaf and of wrapper leaf. Double carbonate of potash and magnesia 

 gave a slightly larger yield than sulphate of potash. The results from 

 cotton-seed meal were regarded as .slightly more favorable than those 

 from linseed meal. Nitrate of soda (one-half applied interculturally) 

 appeared to reduce the yield of wrai)pers. Barnyard manure showed 

 no superiority over commercial fertilizers. 



At Eocky Springs the soil was thin and "gravelly," belonging in the 

 limestone class. Drought and hail vitiated the results. Here phos- 

 phoric acid was without marked effect. 



The yield and quality of the fermented tobacco and the results of the 

 chemical studies on the cro])S are to be published later. 



Experiments with wheat, U. J. Waters and E. J. Weld [Penn- 

 sylvania Sta. lipt. 1893, pp. 112-115 J dgm. 1). — These consisted of tests of 

 varieties and of seed selected by hand in comparison with that from 

 the threshing machine. ^STo marked differences in yield resulted from 

 the 2 classes of seed. On duplicate twentieth-acre plats 26 varieties of 

 wheat were tested in 1892 and 33 varieties in 1893. Tabulated data 

 give yields of every variety for each year tested. The average yields 

 l)er acre for 1890, 1891, 1892, and 1893 were as follows: 



Average yields of different varieties of wheat for 4 years. 



Variety. 



Bushels. 



Keliable 



Valley 



Currell Prolific 



Deitz Longberry Ked 



Wyandotte lied 



Fulcaster 



Ontario Wonder 



Mediterranean 



Theiss 



Kaub Black Prolitic . 



Democrat 



Eed Fultz 



Sibley iJ'ew Golden.. 



32.33 

 30. 97 

 30.97 

 30.84 

 30.71 

 30.52 

 29.54 

 28.90 

 28.35 

 28. 23 

 28.08 

 27. 78 

 27. 56 



Variety. 



Extra Early Oakley . 

 Uie.hl Mediterranean 



Fultz 



Gorman Emperor 



Mealy 



Kiirger 



Deitz 



McGhee Wliite 



Tuscan Island 



Velvet Chatt' 



Finley 



Irniiroved Kice 



Miller Prolitic 



Bushels. 



27.41 

 27. 25 



27. 18 

 2G. 98 

 26.86 

 26.08 

 25.98 

 25.47 



25. 19 

 24.67 

 24.30 

 23.18 

 22.18 



