not enter the cylinder in bunches. More than 200 bushels of
seed have been threshed in a day from crops which yielded abundantly.
The seed should be carefully winnowed before putting it on the market.
The seed crops, as would naturally be expected, vary much; crops are
harvested which run all the way from 1 to 20 bushels per acre. From
irrigated lands the yields are, of course, much more uniform than from
unirrigated lands, since in the former the supply of moisture may be
controlled. Fair to good average yields on these may be stated at from 4
to 6 bushels, good yields at from 6 to 8 bushels per acre, and specially
good yields at from 10 to 12 bushels. The bushel weighs 60 pounds.
Growing alfalfa seed under irrigation has frequently proved very
profitable. The seed grown in such areas is larger and more attractive
to the eye than that ordinarily grown in the absence of irrigation, and
because of this many are lured into sowing it on unirrigated land when
the former would better serve their purpose. The seed is frequently
adulterated with that of yellow clover (_Medicago lupulina_), which
resembles it closely, but this is more likely to be true of imported
than of American grown seed.

=Renewing.=--Alfalfa may be renewed and also renovated where the stand
secured at the first has been insufficient, where it may have been
injured from various causes, where it is being crowded with weeds, and
even with useful grasses, and where the land requires enriching.

The stand of alfalfa secured is sometimes thin and uneven. This may
arise from such causes as sowing too little seed; whether over-dry or
through the crowding of the young plants. When this happens, in many
situations it is quite practicable to thicken the stand by disking the
ground more or less, adding fresh seed, according to the need of the
crop, and then covering the seed thus added with the harrow. Such
renovation would be comparatively easy on clean land, were it not for
fact that the alfalfa plants already rooted overshadow the young plants,
always to their injury, and sometimes to their total destruction. The
spring will probably be the best season to attempt such renovation, but
there may be instances where the winters are not severe, in which autumn
seeding will succeed as well or better than spring seeding. Because of
the uncertainty of the results of such renovation, the aim should be so
to prepare the land and sow the seed that a good, thick stand will be