Which one of the following sets of conditions is necessary for a good cultivation of wheat ?

Wheat generally performs best under moderate temperatures and moderate rainfall; agronomic data give an optimum temperature range of roughly 12–25°C and a rainfall requirement of about 25–75 cm, which aligns with “moderate” conditions [1]. Authoritative crop guidance also indicates mean daily optimum temperatures for growth and tillering around 15–20°C, with a preference for a dry, warm ripening period near 18°C to secure yield and quality [2]. Many wheat-growing systems, especially winter-wheat areas, exploit autumn sowing and winter rains to establish the crop before cold periods, underscoring the need for moderate seasonal rainfall rather than heavy or scanty precipitation [3]. Therefore option (1) is the correct choice.

Sources

1. [1] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 12: Major Crops and Cropping Patterns in India > Tobacco > p. 56
2. [2] https://www.fao.org/land-water/databases-and-software/crop-information/wheat/en/
3. [3] Certificate Physical and Human Geography , GC Leong (Oxford University press 3rd ed.) > Chapter 19: The Warm Temperate Western Margin (Mediterranean) Climate > Economic Development of the Mediterranean Regions > p. 186