Before I start, I apologize if this is a mirror thread. Now, let's get started.
Also, please note that I only give requirements for Level 1 technologies, any higher I cannot help. (The gold requirement may be lower for you, though).
Resource Technologies
Agriculture:
Requires:
Level 1 Academy, Level 2 Farm, 1,000 food, 2,000 gold.
Reward: Go to quests, claim your reward. This research increases food production by 10% every upgrade.
Lumbering:
Requires:
Level 1 Academy, Level 3 Sawmill, 2,000 lumber, 400 iron, 4,800 gold.
Reward: Go to quests, claim your reward. This research increases lumber production by 10% every upgrade.
Masonry:
Requires:
Level 2 Academy, Level 2 Quarry, 1,000 stone, 400 iron, 3,000 gold.
Reward: Go to quests, claim your reward. This research increases stone production by 10% every upgrade.
Mining:
Requires:
Level 2 Academy, Level 3 Iron mine, 3,200 iron, 8,000 gold.
Rewards: Go to quests, claim your reward. This research increases iron production by 10% every upgrade.