Three demonstration sites were established over the 4 years looking at the interaction of lime rate and cultivation in changing subsoil pH. Sites were located in Warrdarge and North Badgingarra. Spading and mouldboarding to incorporate lime are both relatively expensive methods of increasing subsoil pH and reducing non-wetting. These NACC funded demonstrations aimed to asses the effectiveness of modified one-way plough at achieving subsoil pH change.
Increasing the pH of acidic subsoils in the West Midlands is necessary to increase crop water use and crop yields. A fast way of doing so is to mix lime into the subsoil; spading and mouldboarding are two common methods used in the West Midlands. Both methods are relatively expensive, so this trial aims to assess the effectiveness of a modified one-way plough at achieving subsoil pH change. This trial was located in Warradarge on deep sandy duplex soil.
The trial was aimed at assessing the effectiveness of simple and cheap ‘bolt-on’ attachments to deep ripper tines at incorporating topsoil and applied lime into acidic sandplain subsoils.