770 



Observations on the gkowth of maize continuously on 

 THE same land (pp. 139-149). — Tliese statistics are jriven for crops 

 of com liiised in ISSS-Dl on 4 plats, each contnininji^ 0.3 of an acre. 

 In l.SS.S and 1SS9 all tlie i>lats received the same coninieninl fertilizer, 

 and the quantity of crop reniove«l was practically alike for all. In 1S90 

 and 1891 jdat A receive<l cow manure at tin* rate of alMait 10 <-ords 

 per acre, ]>lat B ]ui}i manure at the rate of alxuit 1.3.."> cords per miv, 

 plat C a complete fertilizer mixture at the rate of 1,700 i)onnds per 

 acre, an<l plat 1) received no fertilizer. The yiehls of corn on the dif- 

 ferent ]»lats are ^iven, together with the food and fertilizing;: ingredi- 

 ents contained in the <rop, and the amounts of fertiliziuiLr materials 

 apjilied to the soil. From these data calculation is nnule of the enrich- 

 ment or im]»overishment of the soil by 4 successive years of manurinj; 

 an<l crop)»ing. 



Till! f^ros.s yield iif kernels aiul of total ciiiji on jilat.s A ami 15, wliirh received a 

 lieavy <lressin;i; (if manure, is jtractieally tlic same, tlio dilVerenee l»ein,n less than it 

 percent. The stover on these plats ditlVrs l»y ahont per eent. beinji; lari;est on 

 plat A where cow manure was used. 



IMat ('. which had received fertilizer iheniicals, ;;ave less ;;ross yield than jdat A 

 liy somewhat more than S jier cent. 



I'lat ]), which for 2 years has had no fertilizer of any kind, i>ro«lu<-ed a eroji 

 wei;ihinji aliout ((2 per cent of the wei^^ht of thocroji harvested from the i)lats\\hi<h 

 hail lieen heavily manured for the last 2 years. * • ' 



The jiroduction of each food ingredient was f^realest on ]>lat A and hast on plat H. 

 Theri! w.-w more water in the liarvested croj) on jdat C" than in that of any otlierplat. 

 [An error in weijiliin;; the suhsaiujiles from this plat is siispectiMl.] 



While the alluimiiioids make up 7. 17 ami 7.(>1 j>er cent respectively of the wlnde 

 dry matter of the crops on plats A and 11. they make only (i.O.'j per cent ol the crop 

 on ])lat I). ' " " There are no strikinj; dilfereiiees in the per cent of fat and 

 liber in the cro]is from the ditlennt plat,s; the per cent of ash in the kernels from 

 the <lil1er»rnt plats is practi<'ally the same; in the stover it is noticeably lower on 

 jdats (' and I*. Nitro;ieii-free extract is 1 jier cent hi;;lier in the kernels from |dal (' 

 and 2 ]>er cent hi^^her than those from jdat D than in kernels from jdats A and 

 H. • • ■ 



The dr\ matlir id' the kermis rioiu plats A and I!, the Inav ily maiinied plats, i on- 

 tained in round numbers 1 ]ier cent more |iroteiii than the kernels from plat ('. which 

 received comnurci.il fertilizers and 2 per cent more than those of jdat l>. m liirh had 

 no leitilizer. 



The AriM-icATidN oi' i-i .ncu'idks fou leaf spot <»i <ji i.m is, 

 j;. 'fiiAXTEK, IMi. 1). (pp. ir)0-l.")2, phite 1). — An a<-count of experi 

 ments in continuation tif those re<-orded in the .Vnniial Kcpoi t of iln- 

 station for 1890 (.see lCxi)eriment Station Kecord, v<»l. in, p. KM. In 

 the spriiiii of 1891 the favorable effect of the application «»f fiiiiiiicitles 

 the jueviotis year was seen in the ;jreatt'r number of blossoms on the 

 treated shrtibs. Uortleaux mixture and precipitated carbonate of «op 

 per (instea«l of the ammoniacal solution used the ])revious se^ison) weir 

 the fuiijiicides used in 1891. Api>lications were nmde AI;iy 11 and "JS 

 ami .Ittne -L'. ''Owing to the unusu;illy dry snnnner. a fourth aiti>li«-a- 

 tiou was unnecessary, the Bordeaux mixture adliering so firmly that it 



