480 



the gross yield and tlie yield of dry matter; od tlie percentage of ker- 

 nels, cobs, and stover in the dry matter; on the comparative develop- 

 ment of the individual maize plants ; and on the percentage composition 

 of the dry matter in the licld-cnred crop, except with regard to the nitro- 

 gen-free extract, was the same as in 1888. In 1889 the percentage of 

 nitrogen-free extract "was largest where the stand was one stalk to a foot, 

 but not very different in the two plats on which the stand was thinner." 

 In 1888 "two stalks to a foot produced the largest percentage with rapid 

 decrease where the stand was thinner." With the dent variety the 

 largest quantities of albuminoids, of fat, and of nitrogen-free extract 

 were produced in 1888 where the plants stood two to a foot, and in 1889 

 where they stood one to a foot. 



In the two years the .ictiial yields of plats C and D [one stalk to a foot, and two 

 stalks to afoot] were 141 bnsUels of [dent] shelled corn per acre, and the stover and 

 shelled corn toi^ether took from an acre of laud in these two crops the quantities of 

 nitrogen, phosphoric acid, and potash given below. There are also giveu the quan- 

 tities of the same ingredients which were put on in the fertilizer during the two years. 



Put on per acre ia fortilizor during 2 years. . 

 Taken oil' in crop ilunug 2 years 



Nitrogen. 



00.5 

 155.7 



Gain+, loss—, to the land. 



Pbosplioric 

 acid. 



214.4 

 08. 1 



+U0. 3 



Potasli. 



155 6 

 08.6 



+57.0 



It appears that the soil has been drawn upon for 65 pounds of nitrogen — four fifths 

 as much as is required for a full crop of corn. At the same time it has been enriched 

 by as much phosphoric acid as four crops would take from it and by as much potash 

 as a single crop requires. 



This is the result of using a fertilizer containing 4.5 per cent of nitrogen, 10.7 of 

 phoephoric acid, and 7.8 x)er cent of potash at the rate of 1,000 pounj^s per acre, without 

 stable manure. 



Evaporation of water (luring field curing. — "The total weight of crop 

 at the time of cutting was 15,114 pounds per acre, and at harvest 9,15G 

 pounds per acre. If now we assume that there was no loss of dry sub- 

 stance by fermentation or otherwise during the curing, the diflerence, 

 5,958 pounds, is the water which evaporated during field curing — nearly 

 3 tons per acre." 



Analyses of the dry matter of the crop at the time of cutting, when 

 field cured and when house cured, indicated that " the crop did not 

 sutler any great loss from fermentation during field curing." 



Comparison of the crops 0/I888 aiid 1889. — A table which gives the 

 weight of water contained in the field-cured crops for each distance of 

 X)lanting, calculated to like amounts of dry matter, " shows that with 

 the same yield of dry matter in the 2 years there would have been from 

 CG2 pounds to 4,281 pounds more of water to be handled in 1888 than 

 in 1889, or with the average rate of planting, one to two stalks to afoot 

 in the row, about 1.75 tons more of water per acre in 1888 than in 1889. 

 * * * The crops on all the plats, and the yield of each food iugred- 



