ADD BELOW TO MODDESC (seed & fert capacity (--,---) can be whatever you'd like)

<l10n>
	
<!-- tank-->	
	<text name="configuration_graintank">
		<en>Tank Capacity</en>
	</text>
		
	<text name="configuration_seedfert">
        	<en>Seed --,---L/Fert --,---L</en>
        </text>
		
	<text name="configuration_onlyseed">
        	<en>Seed ----- L</en>
	</text>
</l10n>

------------------------------------------------------------------------------

ADD BELOW TO XML

<!-- grain tank config -->
	<configurationSets title="$l10n_configuration_graintank">  
        <configurationSet name="$l10n_configuration_seedfert" isDefault="true">
            <configuration name="fillVolume"   index="1" />
            <configuration name="fillUnit"     index="1" />
            <configuration name="cover"        index="1" />
        </configurationSet>
        <configurationSet name="$l10n_configuration_onlyseed">  
            <configuration name="fillVolume"   index="2" />
            <configuration name="fillUnit"     index="2" />
            <configuration name="cover"        index="2" />
        </configurationSet>
    </configurationSets>