<fillType name="HEMP" title="hemp" showOnPriceTable="true" pricePerLiter="0.313" >
            <image hud="Huds/hud_fill_hemp.png" hudSmall="Huds/hud_fill_hemp_sml.png" />
            <physics massPerLiter="0.50" maxPhysicalSurfaceAngle="15" />
            <pallet filename="$data/objects/pallets/fillablePallet/fillablePallet.xml" />
        </fillType>
           As you scroll down the xml you will need to add hemp to the categories forageHarvester, and mower to what you want.
 <fillTypeCategories>
        <fillTypeCategory name="BULK" >WHEAT BARLEY OAT CANOLA SUNFLOWER SOYBEAN MAIZE POTATO SUGARBEET MANURE SEEDS FORAGE FORAGE_MIXING CHAFF WOODCHIPS SILAGE STRAW GRASS_WINDROW DRYGRASS_WINDROW SUGARCANE FERTILIZER PIGFOOD LIME ALFALFA CLOVER SORGHUM SUDANGRASS CORN2 BLACKBEAN TOBACCO PEANUT RICE HEMP</fillTypeCategory>
        <fillTypeCategory name="LIQUID" >MILK FUEL WATER DIESEL DEF</fillTypeCategory>
        <fillTypeCategory name="PIECE" >WOOL TREESAPLINGS EGG</fillTypeCategory>
        <fillTypeCategory name="WINDROW" >STRAW DRYGRASS_WINDROW GRASS_WINDROW</fillTypeCategory>
        <fillTypeCategory name="COMBINE" >WHEAT BARLEY OAT CANOLA SUNFLOWER SOYBEAN MAIZE ALFALFA CLOVER SORGHUM SUDANGRASS CORN2 BLACKBEAN TOBACCO PEANUT RICE HEMP</fillTypeCategory>
        <fillTypeCategory name="SPRAYER" >LIQUIDFERTILIZER HERBICIDE</fillTypeCategory>
        <fillTypeCategory name="SPREADER" >FERTILIZER</fillTypeCategory>
        <fillTypeCategory name="AUGERWAGON" >WHEAT BARLEY OAT CANOLA SOYBEAN SUNFLOWER MAIZE FERTILIZER SEEDS ALFALFA CLOVER SORGHUM SUDANGRASS CORN2 BLACKBEAN TOBACCO PEANUT RICE HEMP</fillTypeCategory>
        <fillTypeCategory name="FORAGEWAGON" >STRAW GRASS_WINDROW DRYGRASS_WINDROW CHAFF SILAGE</fillTypeCategory>
        <fillTypeCategory name="SILAGETRAILER" >STRAW GRASS_WINDROW DRYGRASS_WINDROW CHAFF SILAGE WOODCHIPS SUGARCANE</fillTypeCategory>
        <fillTypeCategory name="TRAINWAGON" >WHEAT BARLEY OAT CANOLA MAIZE SUNFLOWER SOYBEAN SUGARBEET POTATO ALFALFA CLOVER SORGHUM SUDANGRASS CORN2 BLACKBEAN TOBACCO PEANUT RICE HEMP</fillTypeCategory>
        <fillTypeCategory name="FORAGEHARVESTER" >CHAFF GRASS_WINDROW WOODCHIPS</fillTypeCategory>
        <fillTypeCategory name="SLURRYTANK" >LIQUIDMANURE DIGESTATE</fillTypeCategory>
        <fillTypeCategory name="MANURESPREADER" >MANURE</fillTypeCategory>
        <fillTypeCategory name="FORK" >MANURE SILAGE CHAFF STRAW GRASS_WINDROW DRYGRASS_WINDROW</fillTypeCategory>
        <fillTypeCategory name="ANIMAL" >COW_TYPE_BRAHMAN_GREY COW_TYPE_BRAHMAN_LIGHT_BROWN COW_TYPE_BRAHMAN_WHITE COW_TYPE_BRAHMAN_BROWN COW_TYPE_BROWN COW_TYPE_BROWN_WHITE COW_TYPE_BLACK COW_TYPE_BLACK_WHITE SHEEP_TYPE_WHITE SHEEP_TYPE_BROWN SHEEP_TYPE_BLACK_WHITE SHEEP_TYPE_BLACK PIG_TYPE_RED PIG_TYPE_WHITE PIG_TYPE_BLACK_WHITE PIG_TYPE_BLACK CHICKEN_TYPE_BLACK CHICKEN_TYPE_WHITE CHICKEN_TYPE_BROWN CHICKEN_TYPE_ROOSTER</fillTypeCategory>
        <fillTypeCategory name="HORSE" >HORSE_TYPE_BEIGE HORSE_TYPE_BLACK HORSE_TYPE_BROWN HORSE_TYPE_BROWN_WHITE HORSE_TYPE_DARK_BROWN HORSE_TYPE_GREY HORSE_TYPE_LIGHT_BROWN HORSE_TYPE_RED_BROWN</fillTypeCategory>
        <fillTypeCategory name="FARMSILO" >WHEAT BARLEY OAT CANOLA SUNFLOWER SOYBEAN MAIZE POTATO SUGARBEET SUGARCANE ALFALFA CLOVER SORGHUM SUDANGRASS CORN2 BLACKBEAN TOBACCO RICE PEANUT</fillTypeCategory>
        <fillTypeCategory name="HAYLOFT" >STRAW DRYGRASS_WINDROW</fillTypeCategory>
        <fillTypeCategory name="LOADINGVEHICLE">WHEAT BARLEY OAT CANOLA SUNFLOWER SOYBEAN MAIZE SEEDS FORAGE CHAFF WOODCHIPS SILAGE FERTILIZER LIME ALFALFA CLOVER SORGHUM SUDANGRASS CORN2 BLACKBEAN TOBACCO PEANUT RICE</fillTypeCategory>
    </fillTypeCategories>

		
		<fruitType name="hemp" shownOnMap="true" useForFieldJob="true">
            <general startStateChannel="0" numStateChannels="4" />
            <cultivation needsSeeding="true" allowsSeeding="true" useSeedingWidth="false" directionSnapAngle="0" alignsToSun="false" seedUsagePerSqm="0.04" />
            <harvest minHarvestingGrowthState="4" maxHarvestingGrowthState="6" cutState="8" minForageGrowthState="3" allowsPartialGrowthState="false" literPerSqm="0.92" />
            <growth witheringNumGrowthStates="8" numGrowthStates="7" growthStateTime="24000000" resetsSpray="true" groundTypeChangeGrowthState="-1" groundTypeChanged="NONE" growthRequiresLime="true" />
            <options lowSoilDensityRequired="true" increasesSoilDensity="true" consumesLime="true" startSprayState="0" />
            <destruction filterStart="2" filterEnd="7" state="8" />
            <mapColors default="0.5019608 1.0000000 0.5019608 1" colorBlind="0.3968 0.3712 0.2159 1"/> 
        </fruitType>
		
		
                  As you scroll down the xml you will need to add hemp to the categories forageHarvester, and mower to what you want.

 <fruitTypeCategories>
        <fruitTypeCategory name="GRAINHEADER" >WHEAT BARLEY OAT CANOLA SOYBEAN ALFALFA SORGHUM BLACKBEAN SUDANGRASS CLOVER PEANUT RICE</fruitTypeCategory>
        <fruitTypeCategory name="MAIZEHEADER" >MAIZE SUNFLOWER CORN2 TOBACCO</fruitTypeCategory>
        <fruitTypeCategory name="MAIZECUTTER" >MAIZE CORN2 SUDANGRASS HEMP</fruitTypeCategory>
        <fruitTypeCategory name="DIRECTCUTTER" >GRASS WHEAT BARLEY OAT CANOLA SOYBEAN ALFALFA SORGHUM</fruitTypeCategory>
        <fruitTypeCategory name="PICKUP" >GRASS DRYGRASS</fruitTypeCategory>
        <fruitTypeCategory name="SOWINGMACHINE" >WHEAT BARLEY OAT CANOLA SOYBEAN OILSEEDRADISH GRASS ALFALFA SORGHUM TOBACCO BLACKBEAN SUDANGRASS CLOVER RICE HEMP</fruitTypeCategory>
        <fruitTypeCategory name="SUGARCANE_PLANTER" >SUGARCANE</fruitTypeCategory>
        <fruitTypeCategory name="PLANTER" >MAIZE SUNFLOWER SOYBEAN SUGARBEET COTTON SORGHUM CORN2 SUDANGRASS PEANUT HEMP</fruitTypeCategory>
        <fruitTypeCategory name="WEEDER" >OILSEEDRADISH GRASS</fruitTypeCategory>
    </fruitTypeCategories>
		
		