66 SW£Et POtAtdfig. 



; ' ^ - GEORGrA 1890. ^ ' 



By G. Speth, HoRTicuLTURisT. BuUetia No. ri. Soil— Red clay, 



with clay; subsoil. The effects of kainit and muriate were alike cm 



the average. The valufe of increase above the cost of the fertilizer 



varied according to the variety of the potato^-^from $37.43 to $162.83 



per acre. The cost of ithe fertilizer was $10.2:7 •^cir^9;4o respectively^ 



"The yield of sweet potatoes is governed by the amount o£ potash 



in the fertilizer. A fertilizer, as in the experiment, analyzing 8 per 



cent, phosphoric acid^ 3 per cent, ^monia, and id per cent, of potash 



is the most effective for swe** ipot^toes.- ' 



• ■• '^'-^ 189*. ••'^''■' i -"■ ■ ■- ■ - •>a^..M:jif.-: 



By Hi N.Starnes^ HORTltULTURiST. Bulletin Noi 25; f^*^ teA ;• :Jili 



In the introduction about fertilizer fequiirehients for -thd sweet 

 potato the following is saidv : h ^ j 



"Commercial fertilizers are preferable to stable manure. iRecent 

 fBiVestigations have developed: th« fact that the sweet .ptolato f^eds 

 much more grossly on both nitrogen and potash and requireSjJess 

 phosphoric acid than was formerly supposed.'* ) : . i; 



By H. N. Starnes, HoRTicu|ii),URiST. Bulletin Noiisi^, page!.i38^. 

 ^J| i jThe yield frondi the unfertilized plots, was 133 bu^els. The best 

 yield from the fertilized plotSjjiyas 278 bushels, v ^ 5: , , ;, .| 



"As a source of potash, kainit secjui^ to be prefpral)^, to muriate 

 in. nearly every cpmbination, though the dififer^^ce^ is pot great. In 

 this connectlon.it may be staged th^t.for all slow-growing^rops kainit 

 seems to Be preferable to muriate, as' a sou rpe of potash, ^nd cottor^-- 

 seed meat to nitrate of soda ^as a solirce of nitrogen. Wheri lii^me- 

 dikte actiofe is desifiBle, however, the 'rever'^ie' is tiie ^a^e." ' " • *^' " '^^* 



Experiment bVH. A.' MoRfCAN and B. B. Ross at "BAToil^'feouGE, 

 •-BulletinNo.^r3.'-/^ '^^^^"^^' ■ ^^-' '- ' • -^ 1 ^5r-» 



**Sweet pUtatoes i'equire for'their best development at loose' pul- 

 verulent sarMy loam, fairly fertile, partfculkrlj^ scJ in . phosphoria acid 

 and potash." , ■' *''^^ ■^iU\ ' ■■■-'^ - -t ^I.^. ,:iJM ;"'i: 



MARYLAND. 1892. :»,^,<»^ ,f , k>^ ? 

 By E. H. Brinki^ey, Assistant Agriculturist. Bulletin No. 18. 

 Soil — -Sandy loam. A study of the results shows that the average 

 yield per acre from the unmanured plots was 3599 lbs. and the^hrgn- 

 '' esf'^jrield otl^^Jn^3 from'siilphate df ' potsisfi l/s^^ ^t th^^ratef of ^66 lbs. 

 f)eP^cre^ahVa%^nted to 6357 lbs. fA*t afi'fef, aiirf th^' nexf highest yiefid 

 ^'cafh^ircMi tM Use of muriate oFpOta^ &t the rate if H 2 00 IbSi f (&r 

 acre, amounting to 5920 lbs. per acre. ii»i> , ^^ S.*.irvr .? : • !' 



