Imagine a Godavari-delta paddy grower. Canal release and drainage determine the planting window; labour, seed, fertiliser and electricity determine cost; weather and pests affect yield. After harvest, drying and procurement quality matter. Milling creates a secondary-sector product. Trucks, wholesale markets and retailers provide tertiary services. The final rice price contains more than the farm-gate price because each stage incurs cost and may add value.
A government budget can touch every stage. Water-resources capital spending can improve canal reliability, agriculture extension can advise on crop practices, roads reduce transport delays, and public procurement or food distribution can affect demand. These lines appear in different departments; adding them as if they were one new “paddy scheme” would be wrong. A district's production can grow while a farmer's margin falls if input costs rise faster than farm-gate prices.
Exam application: classify the stages, locate the delta on the map, and distinguish a production statistic from a farmer-income statistic. Ask which agency reports the number and which crop year it covers.
Worked example: A paddy harvest enters a mill, then a wholesale market. Water availability shapes yield, power and machinery shape milling cost, and roads shape delivery. If a canal delivers less than its design, the farm effect may appear before any change in mill output. A district gross-output figure can conceal this chain. To explain a policy, identify its intervention point: seed, irrigation, processing, storage, transport or consumer market.