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Agricultural Drainage             

       

Two major problems in agriculture are water logging and salinisation.  Both of these effects can be reduced through effective Capiphon™ drainage. .

What is waterlogging?

 
       

High rainfall, combined with poor soil structure causes severe waterlogging damage to plant growth.

Waterlogging is a consequence of the high clay content and low permeability of subsoils, resulting in the development of perched watertables during the long cool growing season. It is often associated with dense and sodic subsoils which are common throughout the world. Following rainfall, perched watertables can develop close to the soil surface due to hardpans or dense subsoils restricting profile drainage. In the southern hemisphere, this is most prevalent in the wet winter months of June-August, when temperatures and evaporation rates are low.

 

Under waterlogged conditions, aeration of the soil is reduced, and loss of nitrogen by denitrification and leaching is increased resulting in reduced growth and yellowing of leaves.

The inhibition of gas exchange within the root zone also has the potential to damage plant roots resulting, paradoxically, in restricted water and nutrient uptake by the plant.

Without adequate drainage, these effects can lead to crop failures on both flat and sloping ground.

 

What is Salinisation?

       

All water in soils carries some dissolved minerals (salt).  When this water comes to the surface through the rising watertable and/or capillary movement, it evaporates leaving a more concentrated solution behind in the root zone.  Sometimes this can be seen as a residue on the surface, but it might still be doing damage to the plants even when not visible.

 

This olive grove shows obvious signs of salinisation with surface grass cover dying and trees losing leaves. 

 

 

 

Low cost installation of Capiphon™ drainage successfully solved this problem.