When separating wheat grains from husks, several effective methods can be used:
1. Winnowing: This traditional method involves tossing the mixture to let the wind carry away the lighter husk while the heavier grains fall back.

2. Sieving: Using a mesh, grains are retained while husk passes through based on size differences.

3. Magnetic Separation: If the husk contains magnetic impurities, magnets can separate them from grains.

4. Density-Based Techniques: Flotation or heavy liquid usage exploits density differences for separation.

5. Industrial Machinery: Gravity separators or air classifiers mechanically separate grains and husks based on size, weight, or aerodynamic properties.