• A botanist H.J Dittmer (1937) worked out that a four month old rye plant had an aggregate root length of about 600 km. the number of root hairs in it exceeded 14 billion and their estimated total length would even exceed 10,000 km.
• All the water inside the coconut comes from the ground. As one molecule of water evaporates from the leaves during transpiration, another molecule rises upto fill its place and this goes on in succession throughout the tall stem right from the roots. The secret lies in the force of cohesion.
• Tensiometer is the instrument that measures soil water tension.
• Auxins are known to enhance water absorption.
• Water or sap is lifted from near the root tip to the shoot tip against the force of gravity, sometimes to height of 100 meters. The rate of translocation can be up to 75 cm/minute.