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50 
HOW TO GROW ONIONS 
Continued from page 49 
THE SOIL 
A crop of onions can be grown on any soil which will produce 
a full crop of corn, but on a stiff clay, very light sand or gravel 
or on some muck or swamp lands, neither a large nor a very 
profitable crop can be grown. We prefer a rich loam with a 
slight mixture of clay. This is much better if it has been culti- 
vated with hoed crops, kept clean from weeds and well-manured 
for two years previous, because if a sufficient quantity of ma- 
nure to raise an ordinary soil to a proper degree of fertility is 
applied at once, it is likely to make the onion soft. The same 
result will follow if sown on rank, mucky ground or on that 
which is too wet. 
MANURING 
There is no crop in which a liberal use of manure is more 
essentiai than in this, and it should be the best quality, well 
fermented and shoveled over at least twice during the previous 
summer to kill weed seeds. If rank, fresh manure is used, it is 
liable to result in soft- bulbs with many scallions. Of the com- 
mercial manures, any of the high-grade, complete fertilizers are 
good for ordinary soils, and even very rich soils are frequently 
greatly benefited by fine ground bone, and mucky ones by a 
liberal dressing of wood ashes. 
PREPARATION 
Refer to page 5 for preparation of the soil. 
SOWING THE SEED 
This should be done as soon as the ground can be made ready. 
Here at Rocky Ford we plant from Feb. 20 to April 1. A good 
hand seed drill will do an excellent job of planting. Growers of 
large acreages here plant with the 4 and 6 row beet drills, using 
special plates. This permits cultivating with tractor cultivators. 
The drill should be carefully adjusted to sow the desired quan- 
tity of seed about one inch deep. The quantity needed will vary 
with the soil, the seed used and the kind of onions desired. Thin 
seeding gives much larger onions than thick seeding. Two to 
two and one-fourth pounds of seed per acre is sufficient for very 
large sorts like Sweet Spanish and as much as five or six pounds 
per acre can be sown of the smaller sorts. Use a drill with a 
roller attached, but if the drill has none, the ground should be 
well rolled with a light roller immediately after the seed is 
Planted. It is impossible to cultivate the crop economically 
unless the rows are straight. 12 seeds planted per foot of row 
requires about 1% lbs. to 2 lbs. per acre. 
CULTIVATION 
As s00n as the onions are large enough so that the rows can 
be seen, begin cultivating very shallow and as close to the rows 
as possible without damaging the Plants. Cultivate every week 
to ten days until the bulbs have started to develop. 
Here a special weeder made from clock spring with handle, is 
used for removing grass and weeds from the row (listed page 
ade Do not cover the onions with soil when hoeing or culti- 
vating. 
If under irrigation; irrigate every week to 10 days until the 
crop is matured or up to about 10 days before harvest. Here we 
irrigate 12 to 14 times and cultivate 10 to 12 times. 
Furrows must be large enough to irrigate without flooding. 
Flooded onions will not bulb properly. 
GATHERING : 
As soon as the tops die in the fall, the bulbs should be pulled 
and about four rows put together in each windrow. As soon as 
the tops are dried, cut about one-half inch from the bulb with 
shears and put into field crates. Stack crates in piles of about 
one truckload each and protect top crates from weather. When 
thoroughly cured, run over grader, sort out seallions and dam- 
aged bulbs and store in onion house. Stack So that the best of 
of a small lead pencil, to the field rows. 
The tops of some Sweet Spanish Oniens remain green right up 
until time it is necessary to harvest. The onions may then be 
pauled and allowed to remain in windrows long enough for 
Special Onion Weeders listed page 73 
D. V. Burrell Seed Growers Co., Rocky Ford, Colo. 
