So vast has the literature become that
thespecialists themselves are unable to cope with it. Where the drainage and
aeration are poor, the alkali condition atonce becomes acute. It is exceedinglyeasy
under canal irrigation to create alkali salts on certain areas. The causesof this
failure are to be found in ourselves. Once this is accomplishedwe shall hear very
little about soil erosion. Development andActivities of Crop Plants, Publication No.
The first condition is an impermeable soil.
This simpledevice was put into practice at the
Shahjahanpur Sugar ExperimentStation in India. In this way water can be provided
without anyinterference with soil aeration. Theresources of the Government are being
called up to put the land inorder. The problem must, in the natureof things, be a
local one.
According to Lowdermilk, erosion control in Japan
is like a game ofchess.
A separate institution for this purpose has
beenfounded at Farnham Royal in Buckinghamshire.
This phenomenon can be observed in anyriver valley.
What has been the general result of all thisstudy of vegetable
pathology?
This when suitably conserved will soon re-create
large stretchesof valuable land. The constant passage of the irrigation waterdown
the water channel soon removed the alkali salts. Development andActivities of Crop
Plants, Publication No. In the limans near Odessaand in portions of the Black Sea, a
similar process is taking place.
The catchmentarea of the river is the natural unit
in erosion control.
What has been the general result of all thisstudy
of vegetable pathology? Each field so providedsuffers little or no erosion.
Theaction is reversed in the presence of oxygen.
Iraq also furnishesinteresting examples of the
connexion between alkali and poor soilaeration. These quarantine methods therefore
cannever succeed.
This point of viewderived considerable impetus from
a preliminary study of Indianagriculture.
The run-off then drains away as a thinsheet of
clear water, leaving all the soil particles behind.
This is perhaps thebest local account of soil
erosion which has yet appeared.
An impressive volumeof specialist literature has
resulted. Theanswer is both interesting and illuminating. Development andActivities
of Crop Plants, Publication No.