diff --git a/FS25_ADSmartPickup/adFieldSiloPlanner.lua b/FS25_ADSmartPickup/adFieldSiloPlanner.lua
index 8825692..4000bec 100644
--- a/FS25_ADSmartPickup/adFieldSiloPlanner.lua
+++ b/FS25_ADSmartPickup/adFieldSiloPlanner.lua
@@ -39,6 +39,9 @@ local function chooseStore(stores, silo, fillType, liters, minLiters, reserved,
             if mostFree == nil or free > mostFree then most, mostFree = store, free end
         end
     end
+    -- fabrikker kun med plads til hele læsset: en fabrik tager kun det den forbruger, så en vogn med resten
+    -- holder ved den i timevis (in-game 28/9: 252.000 l kartofler ved en fuld snackfabrik)
+    if production then return best end
     return best or most
 end
 
@@ -69,6 +72,27 @@ local function pickStore(input, farmIncoming, task, liters, minLiters, reserved)
         or chooseStore(input.stores, task.silo, fillType, liters, minLiters, reserved, not wantProduction)
 end
 
+-- Høsten først: for hvert behov {fillType, count} (høstere i arbejde, der mangler tømmevogne) holdes så mange
+-- vogne der kan bære afgrøden tilbage; resten må marksilo-flowet låne. Ny liste; input muteres ikke.
+function ADFieldSiloPlanner.withoutHarvestReserve(vehicles, needs)
+    local held = {}
+    for _, need in ipairs(needs or {}) do
+        local left = need.count or 0
+        for _, vehicle in ipairs(vehicles or {}) do
+            if left <= 0 then break end
+            if not held[vehicle.id] and canCarry(vehicle, need.fillType) then
+                held[vehicle.id] = true
+                left = left - 1
+            end
+        end
+    end
+    local free = {}
+    for _, vehicle in ipairs(vehicles or {}) do
+        if not held[vehicle.id] then table.insert(free, vehicle) end
+    end
+    return free
+end
+
 function ADFieldSiloPlanner.plan(input)
     local minLiters = input.minLiters or 10000
     local storesById = {}
diff --git a/FS25_ADSmartPickup/adFieldSilos.lua b/FS25_ADSmartPickup/adFieldSilos.lua
index 4659ba4..bf604b0 100644
--- a/FS25_ADSmartPickup/adFieldSilos.lua
+++ b/FS25_ADSmartPickup/adFieldSilos.lua
@@ -251,7 +251,8 @@ function ADFieldSilos.collectVehicles(adEnv)
     local vehicles, byId = {}, {}
     -- hvorfor tømmevogne ikke kan lånes (til fanens statuslinje)
     local why = {notEnabled = 0, busy = 0, controlled = 0, noPark = 0}
-    for _, rig in ipairs(ADFieldWork.getRigs(adEnv)) do
+    local rigs = ADFieldWork.getRigs(adEnv)
+    for _, rig in ipairs(rigs) do
         -- uden AD-parkeringspunkt bliver vognen holdende på lagerets markør og spærrer for de næste
         local canPark = ADFieldWork.parkMarkerId == nil or ADFieldWork.parkMarkerId(adEnv, rig.vehicle) ~= nil
         if rig.role == "unloader" then
@@ -266,11 +267,54 @@ function ADFieldSilos.collectVehicles(adEnv)
             byId[rig.id] = rig.vehicle
         end
     end
+    local ok, needs = pcall(ADFieldSilos.harvestNeeds, adEnv, rigs)
+    if ok and #needs > 0 then
+        local before = #vehicles
+        vehicles = ADFieldSiloPlanner.withoutHarvestReserve(vehicles, needs)
+        why.harvest = before - #vehicles
+    elseif not ok then
+        Logging.warning(ADFieldSilos.LOG_PREFIX .. "høstreserve kunne ikke beregnes: %s", tostring(needs))
+    end
     why.eligible = #vehicles
     ADFieldSilos.lastVehicleReasons = why
     return vehicles, byId
 end
 
+-- Høsten først: pr. høster der arbejder (CP kører) holdes dens planlagte antal tømmevogne tilbage, minus dem
+-- markarbejdet allerede har sendt til marken. (in-game 28/9: marksilo-flowet havde lånt begge kartoffelvogne,
+-- og ingen kom til roeoptagerne.)
+function ADFieldSilos.harvestNeeds(adEnv, rigs)
+    local assignments = ADFieldJobs ~= nil and ADFieldJobs.state ~= nil and ADFieldJobs.state.assignments or {}
+    local sent = {}
+    for _, assignment in pairs(assignments) do
+        if assignment.role == "unloader" and assignment.fieldId ~= nil then sent[assignment.fieldId] = (sent[assignment.fieldId] or 0) + 1 end
+    end
+    local needs = {}
+    for _, rig in ipairs(rigs) do
+        if rig.role == "harvester" and ADCpBridge.isWorking(rig.vehicle) then
+            local assignment = assignments[rig.id]
+            local fieldId = assignment ~= nil and assignment.fieldId or nil
+            local field = fieldId ~= nil and ADFieldJobs.getField(fieldId) or nil
+            local info = fieldId ~= nil and ADFields.getInfo(fieldId) or nil
+            local count = field ~= nil and ADFieldModel.maxHelpers("harvesting", field.plan) or 1
+            count = count - (fieldId ~= nil and (sent[fieldId] or 0) or 0)
+            local fillTypes = {}
+            if info ~= nil and info.harvestFillType ~= nil then
+                fillTypes[info.harvestFillType] = true
+            else
+                for fruitIndex in pairs(rig.fruits or {}) do
+                    local fruit = g_fruitTypeManager ~= nil and g_fruitTypeManager:getFruitTypeByIndex(fruitIndex) or nil
+                    if fruit ~= nil and fruit.fillType ~= nil then fillTypes[fruit.fillType.index] = true end
+                end
+            end
+            for fillType in pairs(fillTypes) do
+                if count > 0 then table.insert(needs, {fillType = fillType, count = count}) end
+            end
+        end
+    end
+    return needs
+end
+
 -- ---- lån ----
 
 local function fillTypeName(fillType)
diff --git a/FS25_ADSmartPickup/gui/SmartPickupFieldSiloTab.lua b/FS25_ADSmartPickup/gui/SmartPickupFieldSiloTab.lua
index ca2f990..df14d25 100644
--- a/FS25_ADSmartPickup/gui/SmartPickupFieldSiloTab.lua
+++ b/FS25_ADSmartPickup/gui/SmartPickupFieldSiloTab.lua
@@ -61,6 +61,10 @@ function SmartPickupFrame:fillFieldSiloRows(adEnv)
         self:addTextRow(string.format(i18n:getText("spu_fs_noVehicle"), why.noPark, why.busy, why.controlled, why.notEnabled))
     end
 
+    if why ~= nil and (why.harvest or 0) > 0 then
+        self:addTextRow(string.format(i18n:getText("spu_fs_harvestHeld"), why.harvest))
+    end
+
     self:addTextRow(i18n:getText("spu_fs_silosTitle"))
     if plan == nil or #plan.status == 0 then
         self:addTextRow("    " .. i18n:getText("spu_fs_nothing"))
diff --git a/FS25_ADSmartPickup/l10n/l10n_da.xml b/FS25_ADSmartPickup/l10n/l10n_da.xml
index 09a66a8..0a2d595 100644
--- a/FS25_ADSmartPickup/l10n/l10n_da.xml
+++ b/FS25_ADSmartPickup/l10n/l10n_da.xml
@@ -501,5 +501,6 @@
         <text name="spu_fs_reserveDays" text="Foderreserve: staldenes forbrug i"/>
         <text name="spu_fs_days" text="%d døgn"/>
         <text name="spu_fs_toFactory" text="→ fabrik"/>
+        <text name="spu_fs_harvestHeld" text="%d tømmevogn(e) holdes tilbage til høstere der arbejder"/>
     </texts>
 </l10n>
diff --git a/FS25_ADSmartPickup/l10n/l10n_en.xml b/FS25_ADSmartPickup/l10n/l10n_en.xml
index 30ccc00..2c5cc30 100644
--- a/FS25_ADSmartPickup/l10n/l10n_en.xml
+++ b/FS25_ADSmartPickup/l10n/l10n_en.xml
@@ -501,5 +501,6 @@
         <text name="spu_fs_reserveDays" text="Feed reserve: barn consumption for"/>
         <text name="spu_fs_days" text="%d days"/>
         <text name="spu_fs_toFactory" text="→ factory"/>
+        <text name="spu_fs_harvestHeld" text="%d unloading trailer(s) held back for working harvesters"/>
     </texts>
 </l10n>
diff --git a/FS25_ADSmartPickup/modDesc.xml b/FS25_ADSmartPickup/modDesc.xml
index c55cec6..60ce81e 100644
--- a/FS25_ADSmartPickup/modDesc.xml
+++ b/FS25_ADSmartPickup/modDesc.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8" standalone="no"?>
 <modDesc descVersion="107">
     <author>masterdraco</author>
-    <version>1.45.0.0</version>
+    <version>1.45.1.0</version>
     <title>
         <en>AD Smart Pickup</en>
     </title>
diff --git a/tests/test_adFieldSiloPlanner.lua b/tests/test_adFieldSiloPlanner.lua
index 8a5effa..3e50742 100644
--- a/tests/test_adFieldSiloPlanner.lua
+++ b/tests/test_adFieldSiloPlanner.lua
@@ -111,5 +111,23 @@ check("P7 reserve mangler men ingen gård tager varen -> fabrik", r.dispatch[1].
 check("P7 status ok (ikke noFarmStore)", r.status[1].state, "ok")
 check("P7 status viser destination", r.status[1].toProduction, true)
 
+-- fabrik kun når hele læsset kan være der (in-game 28/9: vogn med 252.000 l ventede timevis ved en fuld fabrik)
+r = P.plan(base({stores = {store("farm", 5000, {[WHEAT] = 1000000}), factory("mill", 100, {[WHEAT] = 30000})}, silos = {silo("A", 500, {[WHEAT] = 90000})},
+    vehicles = {vehicle("v1", 400, 50000)}}))
+check("P8 fabrik uden plads til hele læsset -> gårdlager", r.dispatch[1].storeId, "farm")
+r = P.plan(base({stores = {store("farm", 5000, {[CANOLA] = 1000000}), factory("mill", 100, {[WHEAT] = 30000})}, silos = {silo("A", 500, {[WHEAT] = 90000})},
+    vehicles = {vehicle("v1", 400, 50000)}}))
+check("P9 kun fabrik uden plads til hele læsset -> ingen afsendelse", #r.dispatch, 0)
+
+-- høsten først: tømmevogne holdes tilbage til høstere der arbejder
+local vs = {vehicle("v1", 400, 50000), vehicle("v2", 400, 50000, {[CANOLA] = true}), vehicle("v3", 400, 50000)}
+local left = P.withoutHarvestReserve(vs, {{fillType = WHEAT, count = 1}})
+check("R1 én hvede-vogn holdt tilbage", #left, 2)
+check("R1 raps-vognen er fri", left[1].id == "v2" or left[2].id == "v2", true)
+left = P.withoutHarvestReserve(vs, {{fillType = WHEAT, count = 5}})
+check("R2 alle hvede-vogne holdt tilbage", #left, 1)
+check("R3 intet behov -> alle fri", #P.withoutHarvestReserve(vs, {}), 3)
+check("R4 input muteres ikke", #vs, 3)
+
 print(failures == 0 and "\nALLE TESTS OK" or ("\n" .. failures .. " FEJL"))
 os.exit(failures == 0 and 0 or 1)