The concept of timeliness recognizes that there is an optimum time to perform certain crop production operations from planting through to harvesting. If one or more of these operations is performed too early or too late, a timeliness penalty is likely to accrue, that is, yield and/or the quality of the crop is diminished, yielding a lower price to the farmer. For example, the ideal time to harvest grain is when the crop is ripe and the moisture is low (see also, Maintaining Working Conditions and Operation of Machinery).
By common consent, diesel oil (used to power the compression ignition engines, so dominant in agriculture) is a nonrenewable resource. Attempts to find or identify a diesel fuel substitute that could be used in conventional diesel engines have made some progress. In particular, the use of oils from renewable oilseeds has enjoyed some limited success in countries such as Austria, where generous tax remission is allowable on a fuel that is otherwise uneconomic.

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The concept of timeliness recognizes that there is an optimum time to perform certain crop production operations from planting through to harvesting. If one or more of these operations is performed too early or too late, a timeliness penalty is likely to accrue, that is, yield and/or the quality of the crop is diminished, yielding a lower price to the farmer. For example, the ideal time to harvest grain is when the crop is ripe and the moisture is low (see also, Maintaining Working Conditions and Operation of Machinery).
By common consent, diesel oil (used to power the compression ignition engines, so dominant in agriculture) is a nonrenewable resource. Attempts to find or identify a diesel fuel substitute that could be used in conventional diesel engines have made some progress. In particular, the use of oils from renewable oilseeds has enjoyed some limited success in countries such as Austria, where generous tax remission is allowable on a fuel that is otherwise uneconomic.

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