269 
Americnn Agriculturist, March 24,1923 
w 
difficulty in arriving at the conclusion 
that potash pays. The eight-bushel 
increase gained by increasing the pot¬ 
ash to 6 per cent would probably more 
than pay for the increase in cost under 
normal conditions. The point of dimin¬ 
ishing returns probably lies close to 6 
per cent. Certainly the four bushels 
gained by increasing the percentage 
from 6 to 10 would hardly pay for the 
trouble and expense even with potash 
at the present low price level. 
The yields with marl have been good, 
although none has been applied since 
1917. It should be pointed out, how¬ 
ever, that a large percentage of the 
potatoes on the marled plots have been 
so scabby as to be unsaleable. 
It is not entirely safe to draw gen¬ 
eral conclusions from a local experi¬ 
ment, but since this soil is typical of 
much of the potato soil found in this 
and other Coastal Plain sections, it 
seems safe to suggest that in a large 
majority of cases, with similar soil 
and climatic conditions, 1,200 to 2,000 
pounds of a fertilizer analyzing 4 per 
cent nitrogen, 8 per cent phosphoric 
acid and 3 to 6 per cent potash, with 
the nitrogen derived from at least two 
sources, will come about as near giving 
the maximum returns for the invest¬ 
ment as any that can be offered. 
The work makes it quite clear that 
there is little need for using organic 
materials beyond the amounts required 
to give a good mechanical mixture, if 
nitrogen in this form is to continue to 
cost more than nitrogen in the form of 
nitrate of soda and sulfate of ammonia. 
The Best Truck for the Farm 
A **Jim-Dandy'* Truck 
Model K-16, One Ton 
*1295 
Cha$sU only—at tho factory 
For general farm use, on hard roads or in rough fields, the Model 
K-16 one ton GMC provides more pulling power, more speed, and 
more economy than other trucks of the same capacity. 
Moreover, this “Jim-Dandy” truck is built from truck parts 
exclusively—no passenger car parts used. Consequently it has 
the sturdiness and enduring performance that is demanded for 
hauling over all kinds of roads and in all kinds of weather. 
The Relation of Lime to 
Farm Prosperity 
{Continued from page 263) 
as I imagine those of this locality to 
be, two tons of ground rock will pay 
if you are able to buy it.” 
“I have read that half a ton of the 
burnt lime is equal to a ton of ground 
rock. Is that so?” 
“In theory, yes, or approximately so. 
In practice, rarely, if ever. We will 
take, for example, 100 pounds of raw 
limerock, analyzing in theory an abso¬ 
lutely pure carbonate of lime, and 
burn it in a kiln. On removing the 
product from the furnace, we find that 
in passing through the process of burn¬ 
ing it has thrown off weight to the 
amount of 44 pounds, leaving 56 pounds 
of calcium oxide, or, in plain English, 
burnt lime. The 44 pounds weight that 
has been lost consists not of moisture, 
as you might suppose, but of an ele¬ 
mental gas called carbon dioxide. 
“Now, when our 56 pounds of burnt 
lime is removed from the furnace, it 
imme'diately begins to seek this affinity 
it has lost, and in passing through the 
processes of slackening it recovers 
every ounce of the lost element and be¬ 
comes once more 100 pounds of calcium 
carbonate, or raw lime. It is only when 
it has returned to this carbonate form 
that it becomes available for soil sweet¬ 
ening. 
“Where we err in assuming that 56 
pounds of burnt lime equal 100 pounds 
of raw lime is that we do not take into 
consideration the fact that the burnt 
product begins to seek its affinity, to 
take back lost weight, the moment it 
leaves the kiln. If it could be tightly 
confined in bai'rels, there would be no 
great action in a considerable period, 
but shipped loosely in box-cars, it is 
possible that the 56 pounds may become 
60 or 70, or even more, by the time 
the farmer receives it as weighed out 
by the local dealer. Also, we must con¬ 
sider the possibility that quantities of 
the stone may not be well burned, and 
in too large chunks to be available as 
raw lime.” 
Which Form of Lime Is Best? 
“Then you think the raw rock is 
best?” 
“I would not make that statement. 
Either form is excellent when properly 
applied, and the whole of lime science 
as bearing on the right kind to use re¬ 
solves itself into a simple question of 
where you can buy the most calcium 
carbonate, that is, available lime ele- 
arent, for the least money, taking into 
consideration the difficulties of hauling 
and spreading. If you are in a section 
where burnt lime is cheap and cheaply 
handled, use that form. If the mill 
price and freight rates on the ground 
rock are much lower than the other, 
(^Continued on page 270) 
CMC Chassis list at fac¬ 
tory as follows: One Tons 
$12 9 5; Two Ton, 
$2375; Three and One- 
half Ton, $3600; Five 
Ton, $3950; tax to 
be added 
The exclusive features of GMC construction, developed from more 
than ten years of successful truck building, have provided this 
truck with more continuous performance and lower operating 
and maintenance costs. Due to its advanced design there is not a 
single wearing part in this truck that cannot be replaced. Such 
refinements as Removable Cylinder Walls, Removable Valve 
Lifter Assemblies, Pressure Lubrication, and Instantaneous 
Governor action all give to this truck the dependability that 
is so vital in farm trucking. 
In every detail of construction the Model K-16 has been built 
according to the most approved and most advanced practices. 
Magneto ignition, electric lights and starter with conduit wiring 
entirely separate from the ignition wjring, radius rods, thermo¬ 
syphon cooling, oversized brake drums, interchangeable brake 
rods, complete instrument board, pressure chassis lubrication, 
cord tires— 
All these are universally accepted as the best for motor truck 
use—all these are standard in this GMC. 
Measured by any standard this one ton truck has no superiors— 
and its cost, considering its quality, is much lower. 
Write for an illustrated booklet, “Motor Trucks on the Farm.’* 
General Motors Truck Co^Pontiac, Michigan 
Division of General Motors Corporation 
Dealevs and Service in Most Communities 
FERTILIZERS 
Croxton Brand 
Commercial Fertilizers 
ALSO RAW MATERIALS 
Carload or less Carload lots 
NITRATE OF SODA TANKAGE 
SULPHATE OF AMMONIA BONE MEAL 
ACID PHOSPHATE MURIATE OF POTASH 
BLOOD SULPHATE OF POTASH 
Inquiries should state whether carload or less carload 
and in commercial mixtures, analysis desired. 
N. J. FERTILIZER & CHEMICAL CO. 
Factory: CROXTON, JERSEY CITY, N. J. 
Office: 38 RECTOR STREET, NEW YORK 
KENTUCKY NATURAL LEAF TOBACCO 
Chewing, 5 pounds, $1.75; 10 pounds. $3.00; 20 pounds, 
$5.25. Smoking, 5 pounds, $1.25; 10 pounds, $2.00. 
Send no money. Pay when received. FARMERS’ CO¬ 
OPERATIVE TOBACCO UNION, Paducah, Ky. 
XHfEND’SPRmRS i 
GASPORT,N.Y. ’ 
On FENCE, GATES 
STEEL POSTS, PAINTS 
■MBBand ROOHNa 
*‘Ihave saved 
$56.00 on my 
order. Ipaid 
you 87c per 
rodandfence 
here no bet- 
teris93^c.’* 
Cbaa. Rowe. 
Stella, Mo. 
Gates, Barb Wire, 
Steel Posts. Roofinff 
and Paints. Highest 'V 
Quality Guarantead. f 
Prices ^ 
BOOK 
Write for Jim Brown’s big new /T 
Bargain l^ok.— FREE] See 
Jim Brown’s Factory Prices, 
Freight Preoaid. Send post- /fl( Tw Z 
card or letter NO W.Jim 
Brown, President. 
The Brown Fence & Wire Co. 
Dept. 3009 Cleveland, OhloUf^W 
Thresh With Half the 
Usual Machine Crew 
You can thresh with only half of the 
crews needed on old-type raachiiu's 
when you use the 1923 Farquhar 
Thresher. Gearless Windstacker never 
chokes, puts straw exactly where it is 
wanted with minimum hand labor. Self- 
feeder, keeps thresher always working 
at full capacity, eliminates services of 
one mail. Patented grain-saving de¬ 
vice at bottom of windstacker prevents 
grain from being blown out and lost. 
Strong, light running trucks. Threshes 
all kinds of grain, soy beans and cow 
peas—also comes with clover hulling 
and rice attachments. 
Simple and economical in operation. 
Satisfaction guaranteed. 5 different 
sizes. Write for catalog. 
A. B. FARQUHAR CO.,Umited 
Box 531, YORK, PA. 
FARQUHAR 
