798 
THE GARDENING WORLD. 
December 21, 1907. 
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6difopial. 
“ Seed and Soil IwocuUUon.” 
The above is the title of a pamphlet 
bearing on the subject of the fixation of 
nitrogen from the atmosphere by means 
of the nodules on the roots of the Pea 
family. This pamphlet has been written 
by Professor W. B. Bottomley, M.A., 
Ph.D., of King’s College, London, to give 
a record of the discoveries of science in 
this matter by various professors in differ- 
ent’parts of the world. It also deals with 
experiments that have been carried out 
in various parts of this country with the 
object of showing the advantage of in¬ 
oculating either the seed or the soil in 
which Peas, Beans, Scarlet Runners, or 
any other member of the Pea family had 
been sown. Some of the experiments that 
have been carried out in this country 
have been done by people who had never 
studied the subject, and therefore were 
unable to take advantage of this new dis¬ 
covery by using it in the proper way, on 
suitable soils, etc. In some cases the 
bacteria used were dead before being ap¬ 
plied either to seed or soil, and, of course, 
when no results were obtained the culti¬ 
vator considered the material as value¬ 
less. 
It is quite useless and unnecessary to 
apply it to soils that are rich in vegetable 
matter, as they are already well supplied 
with these microscopical organisms, and 
applying more is merely like taking coals 
to Newcastle or Potatos to Ireland. There 
are, however, soils that have been lying 
in an uncultivated condition for many 
years, and on such this material could 
not fail to be serviceable. There are 
also gravelly and sandy soils in various 
parts of this country that could be made 
fertile by sowing some, member of the Pea 
familv on the soil, at the same time in¬ 
oculating these soils or the seeds to be 
sown with microbes. In a state of nature 
we find what would otherwise be barren 
heaths occupied with luxuriant crops of 
Gorse and Broom, which are also mem¬ 
bers of the Pea family, and with the aid 
of the microbes which assist them they 
can make a luxuriant growth, and in 
course of time so enrich those barren soils 
as to make them capable of supporting 
crops of grain and other agricultural, as 
well as horticultural, crops. 
Experiments have been carried out in 
various parts of England, Scotland and 
Ireland, and in nearly every case the use 
C ^ 
The species of Ceanothus are very 
numerous, and a good many of them are 
grown in this country for the purpose of 
covering garden walls and house fronts. 
The best known is C. azureus Gloire de 
Versailles, which has myriads of small, 
bright blue flowers, produced in large 
bunches. The subject we wish to call 
attention to on this occasion is another 
variety of the last-named and known as 
Perle Rose. The name indicates the 
of these organisms has given excellent 
results. At Hindhead and Sutton, in 
Surrey, the seeds were inoculated, and at 
Hindhead sown on sandy soil, resulting 
in a splendid crop of Sweet Peas. At 
Sutton the land was freshly dug meadow, 
and here again the cultivator obtained the 
finest crop of Sweet Peas he ever raised. 
The sandy soil at Woking was also sown 
with inoculated Peas, and the crop was 
excellent, sometimes more than double 
that which had not been treated. Scarlet 
Runners were employed at Redhill, Beans 
and Peas at Knap Hill, and the crop, be¬ 
sides being earlier, was heavier. 
(Ceanothus Perle Rose). 
colour, being of a soft, clear, rosy pink. 
The individual flowers are small, aS may 
be seen by reference to the accompanying 
illustration, but they are produced in 
such numbers as to present a cloudy ap¬ 
pearance, but being pink, they have "quite 
a different effect to white flowers. > 
Whether the plant would ultimately get 
tall if planted against a wall, there is 
some doubt. It can be grown in a very | 
dwarf state. 
Ceanothus Perle Rose. Maclaren and Sons. 
R Beautiful Sfyrub for Beds. 
