We do not know. It might make the soil better for the trees by allowing escape for surplus water through previous layers. It might allow the tree to root more deeply for moisture in those strata. It might allow water to rise from such strata if they have water under pressure. It might do other things good or bad, according to conditions prevailing under the hardpan. If you are to irrigate the land the effects would probably be good.
The Sub-soil Plow.
I am contemplating using a sub-soil plow for the purpose of breaking plow-sole on grain land. This is about 4 1/2 inches below the surface and is about 5 inches thick. This soil is comparatively loose and seems to be of good quality. Do you think that the sub-soil plow run low enough to break this plow-sole will benefit the land?
There can be no question about the benefit of breaking up this tight stratum, provided you use a long-tooth harrow or a subsoil packer afterward to reduce the land so that it will not be too open to loss of moisture by too free circulation of air. The best way to treat such a soil would be to use a tractor and plow to a full foot of depth, for this, followed by good harrowing, would disintegrate the hard stuff and commingle it with the loose surface soil and make it somewhat more retentive - doing this when the moisture is just right for disintegration and mixing. If you are not ready to go to this expense, a subsoiler, following the plow with another team, would put your land in better shape for dry farming or for irrigation than it is now. Starting late, however, might give you less crop the first year on such deep working than by shallow plowing if the year's rainfall should be scant. It would, however, be a good start for summer-fallowing and a big crop the next year.
Sour Soil.
What is "sour" soil? Is that the name by which it is commonly known, and what is the treatment for it?
Sour soil is soil in which an acid is developed by plant decay and exclusion of air. The proper treatment is the application of lime, and aeration by open tillage and underdrainage.
Old Plaster for Sour Land.
Can house plaster be used in reclaiming sour ground and how much per acre? The ground produces some sour grass - not a great deal. The plaster is from an old building that is being torn down.
House plaster is desirable as an application to land which is sour. It also adds to the mellowness of land which is hard, because of the sand contained in it. It has always been considered a good dressing for garden land. So far as the correction of sourness goes, it is much less active than fresh lime, but it acts in the same way to a limited extent. It is certainly worth using, providing it does not cost too much for delivery, and can be freely used if the land is heavy and needs friability.