Soil Improvements

Soil Improvements

The data presented on this page and in the attached Information Sheets show the Deep Seedbed Conditioner dramatically:

    • increased crop production; and
    • improved soil physical, biological and nutritional root zone conditions.

The creation of a deeper, loose, structurally stable root zone soil:

    • produced more top growth and INCREASED grain production by an AVERAGE of 24 %;
    • over 15 yrs, across two continents, across Australia and across Pakistan;
    • over a wide range of soil types and crops;
    • over 24 cropping seasons;
    • in both dryland and irrigation farming systems.                                                                                                        (See Info. Sheet No. 4, below.)

The UNDISTURBED crop root systems in DSC soils INCREASED in mass by > 30 % and depth (> 85 % of this increased root mass occurred between 100 – 300 mm soil depth), and were shown to:

    • REINFORCE loose soil and MINIMISE or PREVENT reconsolidation ( > 70 % of the increased porosity was retained beyond harvest);
    • INCREASE soil organic carbon (by  > 48 %) and soil nitrogen (by > 30 %) (i.e., increased soil biological activity);
    • MAKE CARBON FARMING  very profitable ( e.g., by  > AU $ 5.17 million  / 1,000 ha (@ CCU = AU$ 55 / tonne), through the build-up of soil carbon over 6 years);                                                                              (See Info. Sheet No. 5, below.);                                                                                                                            
    • REMOVE  production limitations of compact subsoils (i.e., limited water absorption, limited plant-available water, limited oxygen and restricted root growth);
    • INCREASE infiltration capacity (water storage) in 0 -300 mm soil depth by > 40 mm (or  34 %) ;
    • INCREASE the plant water extraction by > 63 %, via enlarged root systems in more porous soil, i.e., INCREASED DROUGHT RESILIENCE;                                                                                                                                 (See Info. Sheet No. 6, below.);                                                                                                                                                     
    • PREVENT dispersion in sodic soils by preventing saturation and reducing the percentage of exchangeable sodium by > 8%;        
    • INCREASE the nutrient holding capacity (cation exchange capacity) by ~ 60% over 6 years, through the increase in soil organic matter ;  
    • RAISE the pH of an acid soil  by ~ 1.0 unit, through the increase in soil organic matter;                            (See Info. Sheet No. 7, below.).

A stand-alone DSC machine requires only ONE rapid, low energy operation prior to seeding.                             

A DSC machine attached to the front of a seeder requires NO extra operation prior to seeding.                   

AND, occasional deep ripping and/or gypsum applications are no longer required.

                                     __________________________________________________________________

                           Easily readable details of these findings are presented in Information Sheets                                                                                              attached to the Green Bars below.

soil improvements
DCS increased plant water extraction by 63 %

Information Sheets containing explanations and substantiation of all the claimed operational, productivity and environmental benefits that flow from the practice of Deep Seedbed Conditioning can be accessed by clicking on the Green Bars below and then clicking on the red download buttons.

Info. Sheet No. 4 - Productivity Increases

This Information Sheet describes the location, soil type, number and type of crops, seedbed type and seasonal conditions (rainfall and irrigation) under which the DSC machine was tested.  It also draws attention to the distinction between soil and field productivity increases.  Across all soil types, seedbed types, crop types and seasonal conditions, DSC always produced increased yields, even on highly fertile black self-mulching soil.

Info. Sheet No. 5 - Roots & Soil Carbon

This Information Sheet outlines the detailed data that explain the extent to which the looseness of DSC root zones is stabilised and root growth is increased and deepened.  The consequences of conserving/preserving the extra root growth is shown to be increased soil carbon and nitrogen, plus a large amount of extra income from the sale of carbon credits.

 

Info. Sheet No. 6 - Compact Subsoil

This Information Sheet explains why deep ripping provides only a temporary and unsatisfactory fix for soils with compact subsoils and uses data collected from a DSC treated site with compact subsoil to illustrate how and why it is the best way to rehabilitate compact soils.  Compared to a no-tillage treatment the DSC soil
(i) maintained its looseness to 250 mm depth with no discernible consolidation throughout three variable rainfall growing seasons;
(ii) had a water holding capacity that was 35 per cent larger and
(iii) had plant water extraction that was 65 per cent greater.

Info. Sheet No. 7 - Sodic Soil

This Information Sheet explains why gypsum applications are unreliable and basically an ineffective means of rehabilitating sodic soils.  Comparatively, sodic soils subjected to DSC practice have their structure stabilised by enlarged and conserved root systems and increased soil biological activity.  In turn, the stabilised and porous root zone is rarely saturated, which prevents dispersion occurring and makes these soils more productive.