How does shading cloth affect light intensity and crop growth?

• A. Shade increases light intensity and leaf temperature.
• B. Shade reduces light, lowers leaf temperature; prevents heat stress but can reduce photosynthesis if overused; match shade percentage to crop stage.
• C. Shade has no effect on crop growth.
• D. Shade always improves photosynthesis.

Answer: (B)

Shading cloth is used to moderate the light and heat around plants. By lowering the light intensity that reaches the leaves, it also reduces leaf temperature, which helps prevent heat stress and lowers water loss on hot days. But light is the energy source for photosynthesis, so too much shading cuts into the plant’s ability to photosynthesize, slowing growth. The smart use of shading is to balance these effects: enough shade to prevent heat damage, but not so much that photosynthesis becomes light-limited. The best shade level depends on the crop’s type and growth stage; crops with high light demand or key growth phases may need less shading, while hotter conditions or more sensitive stages may benefit from more shading.