The power tillers and mini tillers are rapidly replacing bulls for land preparation. The use of the machines are extended even to steep fields, where the accidents resulting from toppling is of serious concern. To determine a safe limit of gradient for the use of the machines, a team of AMC engineers from head office and RAMC, Khangma had carried out tests and evaluation at Chimong village under Pemagatshel Dzongkhag. This was in continuation to the earlier works carried out. The result is under analysis and will be published later.