Improvement of Planosol Solum: Part 4, Field Experiments with Prototype Roll-In and Drop-Down Ploughs

✍ Scribed by K. Araya; M. Kudoh; D. Zhao; F. Liu; H. Jia

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 927 KB
• Volume: 63
• Category: Article
• ISSN: 0021-8634
• DOI: 10.1006/jaer.1996.0030

✦ Synopsis

This paper deals with the design of prototype roll-in and drop-down ploughs and field tests on a planosol solum in China to obtain mixing of the second (Aw) and third (B) horizons to improve the planosol solum , leaving the first (Ap) horizon undisturbed .

The field test results showed that the drop-down plough was ef fective for mixing of the Aw and B horizon of the planosol solum . However , a new problem was encountered , in that the ploughing of the Aw horizon produced large clods , and the Ap horizon crumbled and dropped down among the large clods and reached lower horizons . The roll-in plough was not ef fective for soil mixing because planosol solum was much harger than the pseudogley soil used in soil-bin tests in Japan . The roll-in plough bodies simply penetrated into the soil such as subsoilers do .