With reference to the agricultural knowledge of the Harappans, consider the following statements : 1. There is evidence of ploughed fields at Kalibangan and at Shortughai and also of terracotta models of plough at Banawali and Jawaiwala. 2. There is ample evidence of advanced harvesting tools. 3. Wheat was not known to Harappans. How many of the statements given above is/are correct ?

• Statement 1 is correct: According to authoritative historical sources like Irfan Habib's The Indus Civilization, evidence of ploughed fields has been found at Kalibangan (Rajasthan) and Shortughai (Afghanistan). Furthermore, terracotta models of the plough have been discovered at Banawali (Haryana) and Jawaiwala (Cholistan, Bahawalpur).
• Statement 2 is incorrect: While Harappans had advanced urban planning, their harvesting technology was relatively simple. They primarily used stone blades set in wooden handles. Irfan Habib explicitly describes their harvesting tools as "poor" and notes that copper sickles were likely too expensive for widespread use. There is no "ample evidence" of "advanced" harvesting tools.
• Statement 3 is incorrect: Wheat and barley were the staple crops of the Harappan civilization. Evidence of wheat (specifically bread wheat) has been found at various sites including Mohenjo-Daro and Harappa.

Since only Statement 1 is correct, the answer is One.