Targeting Subsoil Constraints in Southern Queensland: Concept Proof of Spraying Polyacrylamide for Subsoil Stabilisation during Tillage

Subsoil Water

In March, last, Drs. Cunningham and Lewis put ia motion experiments to test the value of Professor Pettenkofer's theory of the propagation of cholera, in the neighbourhood of Calcutta, by daily measurements of the level of subsoil water: they a^s0 caused similar experiments to be undertaken in Oudh. The measurements are now ordered by the Government of India to be carried out in every military ...

Identifying Different Areas of Inhomogenous Mineral Subsoil: Spatial Fluctuation Approaches

We use a recently proposed fluctuation-type procedure for detecting breaks in spatial regions to distinguish between hard and soft areas of inhomogeneous mineral subsoil like additives, air pockets and adhesion. For a proper application, some refinements of the procedure are necessary. Both simulation evidence of the refinement and the application on the subsoil yield favorable results.

Global sensitivity analysis for subsoil parameter estimation in mechanized tunneling

The present paper validates two alternative global sensitivity analysis methods, namely variance-based and elementary effect, for the purpose of detecting key subsoil parameters that influence the output of mechanized tunnel finite element simulation. In the elementary effect method, a strategy for considering the dependencies, that result from a set of constraints between different parameters,...

Absorption of Nutrients From Subsoil in Relation to Crop Yield

Field application of PAM as an amendment in deep-tilled US southeastern coastal plain soils

In sandy soils of the southeastern USA coastal plains, crop production is limited by low water holding capacity and compacted soil layers that reduce root growth and productivity. Polyacrylamide (PAM) was added to sandy coastal plain soils to improve physical properties and yield. Soils were amended with linear and cross-linked PAMs. Treatments and controls included the following: (1) spraying ...