Give two natural and two man-made factors that help in the cultivation of wheat.

Two natural factors that help in the cultivation of wheat are:

1. Wheat is a temperate crop. In India, it is taken as Rabi crop. Winter temperature of North India provides most favourable conditions for wheat cultivation.
2. The fertile friable loamy alluvial soils of clayey composition of the flat and well-drained Indo-Gangetic plains is best suited for wheat cultivation.

Two man-made factors that help in the cultivation of wheat are:

1. Supply of high yielding variety (HYV) seeds with proper use of chemical fertilizers.
2. Excellent irrigation system provided by a close network of canals.