| 摘要 |
A fertilizer knife is supported on an agricultural implement shank including a fertilizer tube extending alongside the implement shank for delivering anhydrous ammonia therethrough. The knife includes a dispensing tube support ed on the knife body at a trailing edge of the knife body for communication wit h the fertilizer tube to dispense fertilizer therethrough. The dispensing tube is formed of a material having a low heat conductivity, for example an insulating material such as plastic, to prevent freeze up of damp soil on the fertilizer knife when anhydrous ammonia is dispensed through the dispensing tube into a furrow formed in the ground by the knife.
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