is interesting to follow the evolution wrought by labour, intelligence,
and capital in the prairie lands of Argentina. First, let us note the
developments on those wonderful tracts of splendid prairie lands lying
between the River Plate and the Andes: fifty years ago these lands were
of little account, and only a few cattle were to be found roaming about
them, but upon the advance of the railway they came under the plough,
and, without much attention or care, produced wheat and maize. After a
time improvements in the method of cultivation produced a better return,
and to-day a great deal of attention is paid to the preparing of the
land, and thought and care are given to the seed time, the growing, and
the harvest. When it is found desirable to rest the land after crops of
wheat and maize, etc., alfalfa is grown thereon. Alfalfa is one of the
clover tribe, and has the peculiar property of attaching to itself those
micro-organisms which are able to fix the nitrogen in the air and render
it available for plant food. Every colonist knows the value of alfalfa
for feeding his animals, but it is not every colonist who knows why this
plant occupies such a high place amongst feeding stuffs. Alfalfa is
easily grown, very strong when established, and, provided its roots can
get to water, will go on growing for years. The _raison d'être_ for
growing alfalfa is for the feeding of cattle and preparing them for
market, and for this purpose a league of alfalfa (6,177 acres metric
measurement) will carry on an average 3,500 head. When grown for dry
fodder it produces three or four crops per annum and a fair yield is
from 6 to 8 tons per acre of dry alfalfa for each year. A ton of such
hay is worth about $20 to $30, and after deducting expenses there is a
clear return of about $14 per acre.

The figures supplied by one large company are interesting; they show
that, on an average, cattle, when placed upon alfalfa lands, improve in
value at the rate of $2.00 per head per month, so it is easy to place a