380 



ami triplicate sainiiles from <'a<li jtlat of a spooial nitrogen exi>erinient 

 with grass." Tlie manner of taking the samples is ilescrilMMl as follows: 



Corn. — Arepr<'S«-ututive buuch of four to eight jilaiits was taken from evj-rv altt-r- 

 uatestook [statki-il in th<- field for some time] and )>ut into a pile, takinfj about half 

 of each sample from the exterior and half from tiie interior of the stook. The 

 total sample thus obtained made a good-sized armful, varj'iug in weight from 10 to 

 tr* pounds. Three distinct samples were taken in this way from each plat [the «lif- 

 fereut sanjples from eacli plat being taken by the same person]. 



Kach entire sanijde was weighed and husked. Tlie stalks from each 8e])arate sam- 

 ple were lut into about 1-inch lengths, and the whole, or very nearly the wh<de, 

 taken for the laboratory sample. < )ne half to two thirds of the e.irs, selected so as 

 to represent the whole as fairly as possible, were taken for the final sam]de. The final 

 samples were weighed, jilaced in cotton bags, and inmiediately shipped to the labora- 

 tory. " * ' [In preparing the dried sample for analysis] the sample of , stover wa.s 

 weighed and then eut into as short pieces as j>ossible by means of a vertical li:f>--cutter, 

 and carefully sain]ded. A samjde of It to 4 (piart** was ground, being put through the 

 mill once. This was again carefully sam)di'd. and enough to fill an S-ounce bottle 

 was taken ami ground till it wouhl |)ass through a round hole 1 mm. in diameter. 

 " • • The [sljellcdj com was carefully sample<l an<l almut a jMut was groiuid, 

 being put through the niill once. This was again sani|de<l and treated in tlie same 

 way as the stover ab«»ve. The final s.'im)de tilled a t-ouiice bottle. 



//«(/ iind UynmiM. — Kepreseiitative handfiils were taken from eaeh windrow [of the 

 dried hay]. ' * " The total s:tm]d<- weighed from 12 to l.'» jmunds, being about 

 all that could be erowdeil into a bran sack. Three distinct samples were taken in 

 this way from each )dat. These large, samples were cut into short lengths, and a 

 final sam]ile of about 4 pounds was selected from each, weighed, and ]>ut in a eotton 

 bag for shipment to th«' laboratory. 



Several samples of legumes were taken by selecting for each an area of 4 square 

 feet, the crop upon whieli seemed to fairly represent the average of the crop in the 

 different ]>arts of the )dat or field, and cutting and taking the total yield of the 4 

 s(|uare feet for a sam]de. ' ' * The hay was prepan'd for analysis in the same 

 way as stover. The entire sample of the legumes was ground, being jtut through 

 flic mill once. Tliis was again 8ami>led an«l gmund till it would jiass through a 

 round liole 1 mm. in iliameter. 



.Vnalyscs were m;Mlr \A' tlir (lil|ilii-:itr saiiiplrs of coin :in<l st^iver 

 from 10 (lifVfii-iit jilats. of triplicat*' samph's <(f the hay from Iff iilafs;. 

 ami of »liii»li<at«' samples of \rtih, rlovcr. and white, yellow, ami l»lne 

 Injiines. the results ot' wliieh are tal»iilat«Ml. Tlie following ('omlen-sed 

 statement shows the extreme ami im-an ditVeiences l»et\\«'en analyses 

 of saini»les tVoin tin* same )»lats. 



]'ariat'ion in compoxHion of mimpltH from tht nainr plutii. 



Com. 



I ' .= 



Slover. 



S 



Har. 



J 5 



WatiT. iif liarv'est 



Ill WiitiT I'ri'C itiil)staiii-i> : 



Xitrogi-D 0.00 



Kilt ' 0.01 



Kit»pr 0. 01 



-\sh 0.01 



Pr. etJPr. H. Pr. et.Pr. et. 

 0.02 : 2.13 , 0.87 1 0.41 



Pr. et. \Pr. ct.iPr. H. Pr. ct. I'r. rt. 

 10.30 { 4.09 0.38 , 4. SO , 1. <i4 



