Introductory Crop Physiology (1+1)

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Factors affecting ascent of sap

1. Water movement is regulated by root pressure and transpiration. All those factors which affect the rate of water absorption and transpiration also influence the ascent of sap.
2. High temperature, atmospheric pressure, wind velocity and low atmospheric humidity influence the ascent of sap as that of transpiration.
3. Soil water deficit also decrease the ascent of sap indirectly by influencing the absorption of water.