VDK_Recolt__Limitations

Step 1 :
Add a new column limitation to your item table name (not null)

Step 2 :
add "i1.limitation AS raw_lim, i2.limitation AS treat_lim" in SQL request and add "'raw_lim', 'treat_lim'" in getResults (server.lua in vdk_recolt : jobs:getJobs event handler)

Step 3 :
You can use this piece of code if you want (from CitizenThread in vdkrec.lua):

if (exports.vdk_inventory:notFull() == true) then
	if (near == 'field' and exports.vdk_inventory:getQuantity(item.raw_id) < item.raw_lim ) then
		recolt('Récolte', item, '+1')
	elseif (near == 'treatment' and exports.vdk_inventory:getQuantity(item.raw_id) > 0 and exports.vdk_inventory:getQuantity(item.treat_id) < item.treat_lim) then
		recolt('Traitement', item, '+1')
	elseif (near == 'seller' and exports.vdk_inventory:getQuantity(item.treat_id) > 0) then
		recolt('Vente', item, '-1')
	end
else
	if (near == 'treatment' and exports.vdk_inventory:getQuantity(item.raw_id) > 0 and exports.vdk_inventory:getQuantity(item.treat_id) < item.treat_lim) then
		recolt('Traitement', item, '+1')
	elseif (near == 'seller' and exports.vdk_inventory:getQuantity(item.treat_id) > 0) then
		recolt('Vente', item, '-1')
	end
end

Step 4 :
In vdkinv.lua, change getQuantity function to :

function getQuantity(itemId)
	if(not ITEMS[tonumber(itemId)]) then
		return 0
	else
		return ITEMS[tonumber(itemId)].quantity
	end
end

Step 5 (if you have vdk_recolt 1.5) :
In server.lua, there is the giveItem event modified

AddEventHandler("player:giveItem", function(item, name, qty, target)
    local player = getPlayerID(target)
    local executed_query = MySQL:executeQuery("SELECT SUM(quantity) as total FROM user_inventory WHERE user_id = '@username'", { ['@username'] = player })
    local result = MySQL:getResults(executed_query, { 'total' })

	local executed_query2 = MySQL:executeQuery("SELECT quantity, limitation FROM `items` JOIN user_inventory ON items.id = user_inventory.item_id WHERE user_id = '@user' AND id = '@id'", { ['@user'] = player, ['@id'] = item })
    local result2 = MySQL:getResults(executed_query2, { 'quantity', 'limitation' })

	if(result and result2) then
		local total = result[1].total
		if (total + qty <= 60 and result2[1].quantity < result2[1].limitation) then
			TriggerClientEvent("player:looseItem", source, item, qty)
			TriggerClientEvent("player:receiveItem", target, item, qty)
			TriggerClientEvent("es_freeroam:notify", target, "CHAR_MP_STRIPCLUB_PR", 1, "Mairie", false, "Vous venez de recevoir " .. qty .. " " .. name)
		end
	end
end)