SAW CO-JAPY. 
Bacteria which infect the land with milky disease, fatal to Japanese Beetle grubs. 1 Ib. (treats 
4000 sq. ft.) $5. 

Turf for Airports 
A smooth take-off and a perfect [anding are impossible in heavy 
mud or on a dry, hard field covered with ruts, but they are easily 
made on level grass-land which has been kept regularly mown. To 
cover a field with a matted, yielding, wear-resistant turf is not 
difficult in most cases, nor need it be costly. 
A good grass field is safe because in bad weather, as well as good, 
the surface is even and firm; and by using grass varieties that have 
tough wiry leaves and very deep roots, a sod can be obtained that 
will not readily develop ruts and mud-holes. Thus will be prevented 
many a broken propeller, many a damaged plane, many an injury 
to the aviator. 
In dry weather, dust is absent from a grass field. There are no 
stones to be caught up by the slipstream to annoy passengers and 
damage wing surfaces, no grit to settie on motors. 

Both small planes and large airliners are safe on grass turf 
Distinctive marking may be helpful to the pilot on an all-grass 
field; and if wished, the field may have runways of dark green against 
a lighter gray-green for the remainder of the area. When this mark- 
ing ts desired, use our Superfine Quality seeds for the runways and 
our Fine Quality seeds for the remainder of the field. The effect may be 
enhanced by applying Special Grass Fertilizer to the runways before 
seeding, and by top-dressing them every spring and fall; it also helps 
if the runways are mown more frequently than the out-field. 
Airport Formula, Superfine Quality. A combination of turf- 
binding grasses that will produce a strong, densely matted turf. 
It gives a sward of a deep green color. 100 Ibs. $80, 1000 Ibs. $775. 
Airport Formula, Fine Quality. Gives a tough, wear-resistant 
turf, of a gray-green color. 100 lbs. $65, 1000 Ibs. $625. 

MAKING A 
Requirements for airports, racetracks, sports 
fields, and other large grass areas are: 
(1) Good drainage. If water collects during and 
after rain, a program of underdrainage must be 
considered if the land is heavy; that is: clay, 
clay-loam, or medium loam. Contouring the sur- 
face slightly will usually take care of this con- 
eae: on Meche Iands, such as sandy loam or 
sand. 
(2) Topsoil must be present. Minimum thick- 
ness would be 5 inches but 7 inches is safer. Top- 
soil from building, runway, or track sites should 
be conserved and added to that already on the 
field. You may have to bring some in from else- 
where. If topsoil has been stripped or lost by 
erosion, manur , spent mushroom soil, or humus 
and some top-soil may be added and mixed with 
the upper 5 inches, in an attempt to make soil, 
but indifferent results must be anticipated. The 
better the soil, the better the turf. The quality 
of topsoil is determined by what grew on it last 


NEW YORK 8, N. Y: 
year; if the weed crop was good, the soil is good. 
Appearance of soil has little bearing; even poor 
land looks good when it is moist. Test the soil, 
using one of the Sudbury Test Kits offered in 
this Catalogue. Make sure that grading does not 
strip topsoil from high spots. First scrape away 
soil, grade, and then replace the soil. 
(3) Surface should be disced. Before doing so, 
spread any suitable material that may be helpful 
to grass and economically available—manure, 
spent mushroom soil, humus. It should be disced 
again and a high-grade, balanced commercial 
fertilizer spread. We recommend our 8-6-4 
Special Grass Fertilizer, used at from 14 to 1 ton 
per acre. If limestone is needed, from 1 to 2 tons 
per acre may be broadcast after the grass has 
been mown several times. 
(4) Rubbish and stones should be gathered up 
and the surface tooth-harrowed. 
(5) Seed at the rate of 100 pounds or more per 
acre is broadcast and brushed in with a bush- 
NEW FIELD 
harrow, made of tree branches. The kind of seed 
would depend upon the locality. Always a mix- 
ture. We increase the Bluegrass ingredient in the 
Middle West; we increase Fescues in the East, 
and for the Southern States we supply a mixture 
high in Bermuda Grass. 
(6) Rolling is helpful but not essential. 
The best periods of the year to sow seed are, 
in order: autumn, winter (on the snow), early 
spring, late spring (resulting turf very weedy). 
RENOVATING AN OLD FIELD 
For weeds, spray with *Tufor, then draw an ad- 
justable disc-harrow, weighted with bags of 
gravel and with the plates set straight, in four 
directions over the turf. Broadcast 44 ton per 
acre of Special Grass Fertilizer 8-6-4 and brush 
with tree branches. Sow 50 pounds or more per 
acre of seed, and brush again. A final rolling is 
desirable. *D.D.T. may be used for white grubs- 
Turf for Racetracks and Polo 
An improved grass track! Thick, springy, deep green in color, and tough—sod which will 
stand up after hard use. To produce it, and to repair damage caused by wear or drought, 
sow our Racetrack Formula seeds. On a polo field,. the relatively smaller area permits more 
detailed care, and justifies the use of our Hurlingham Polo Formula. ; 
Racetrack Formula. Produces a turf which is tough, thick, dark green and vigorous, 
100 Ibs. $70, 1000 Ibs. $675. iY : 
Hurlingham Polo Formula. Mixture used on the well-known English field, adapted to 
American conditions. 5 Ibs. $6.25, 25 Ibs. $28, 100 Ibs. $105. 
SS 
SPECIAL GRASS FERTILIZER 8-6-2. A superior grass food at a price low enough to justify its extended 
use, It contains both chemical and organic materials of high quality; hence it is bot h quick to show results 
and lasting in its effect. Compounded especially for us by the New Jersey Fertilizer Co, with no filler or 
make-weight. Use 14 ton or more per acre for new grass; 14 ton per acre for topdressing existing turf. 
In lots of one ton or more, \Ton $67.50. 
Grass Seeds 11 
*These are described on pages 132 and 133 
