If only three irrigations are available indicate critical stages or wheat when these will be applied

The correct answer is A: Crown root initiation, flowering, doughing stage.
Let's break down why:

Understanding Critical Stages: Wheat needs water most during certain key growth phases. Missing irrigation at these times can drastically reduce yield.

Option A: Crown Root Initiation (CRI), Flowering, Doughing Stage:
* Crown Root Initiation (CRI): This is the most crucial stage. It's when the plant establishes its permanent root system. Lack of water here severely limits growth.
* Flowering: This is when the plant is forming grains. Water stress at flowering reduces the number of grains that develop.
* Doughing Stage: This is the grain-filling stage. Water here ensures plump, heavy grains, directly impacting yield.

Why the other options are less ideal:
* Option B: Tillering, jointing milking: While these stages are important, CRI is more important than tillering. * Option C: CRI, tillering, doughing stage: Flowering stage is a more crucial stage. * Option D: CRI, late jointing and dough stage: Flowering stage is a more crucial stage.
In summary: Prioritizing irrigation at Crown Root Initiation, Flowering, and the Doughing Stage gives wheat the best chance for strong growth and a high yield when only three irrigations are possible.