Even when oilseeds (esterified, partially refined or crude) are used as diesel fuel extenders, the economic difficulty still persists and will continue until such time as diesel oil supplies begin to dwindle or until a more appropriate substitute fuel (renewable or nonrenewable) should emerge. Should diesel fuel supplies run out and an appropriate substitute fuel fail to emerge, tractors and other engine-driven equipment could convert to spark-ignition engines. These are more versatile in terms of fuel use (e.g. renewable alcohol, as well as nonrenewable hydrocarbons) even if less suited to the heavy workloads in agriculture.
For small grain, drying to 14% moisture (wet basis) is sufficient to inhibit both fungal and respirational activity. The shelf life of certain fruits (most commonly apples) may be extended through controlled atmosphere storage (using reduced atmospheric oxygen) in refrigerated stores. In most instances, the careful control of temperature and relative humidity is sufficient to extend the shelf life of most crop products stored on the farm. Increasing emphasis on quality control and assessment will be facilitated by novel items of equipment including the electronic nose, biosensors, X-ray computer-aided technology (i.e. three dimensional mapping; CAT scan), nuclear magnetic resonance (Figure 9) and chlorophyll fluorescence.

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Even when oilseeds (esterified, partially refined or crude) are used as diesel fuel extenders, the economic difficulty still persists and will continue until such time as diesel oil supplies begin to dwindle or until a more appropriate substitute fuel (renewable or nonrenewable) should emerge. Should diesel fuel supplies run out and an appropriate substitute fuel fail to emerge, tractors and other engine-driven equipment could convert to spark-ignition engines. These are more versatile in terms of fuel use (e.g. renewable alcohol, as well as nonrenewable hydrocarbons) even if less suited to the heavy workloads in agriculture.
For small grain, drying to 14% moisture (wet basis) is sufficient to inhibit both fungal and respirational activity. The shelf life of certain fruits (most commonly apples) may be extended through controlled atmosphere storage (using reduced atmospheric oxygen) in refrigerated stores. In most instances, the careful control of temperature and relative humidity is sufficient to extend the shelf life of most crop products stored on the farm. Increasing emphasis on quality control and assessment will be facilitated by novel items of equipment including the electronic nose, biosensors, X-ray computer-aided technology (i.e. three dimensional mapping; CAT scan), nuclear magnetic resonance (Figure 9) and chlorophyll fluorescence.

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