||The movement of molecules from higher
concentrationto lowerconcentrationis called
|The total kinetic energy of the molecules is called chemical potential.•
||It states thatthe rates of diffusionof gases ai.
inverselyproportional to the square roots of the .r
||The pressure exerted by the diffusing particles is known as diffusion pressure.
||The special type of diffusion in which an imbibant absorbs water on its surface without dissolving in it is called imbibition.
||The force generatedby theimbibantsis called
imbibition pressure or metric potential.
||The movement of solvent molecules front the regiQn
||of higher concentration to the region of lower
concentration through semi permeable membrane is called osmosis.
||The maximum pressure that develops when a
solution is separated from its solvent by a semi
permeable membrane is called osmotic pressure.
||The chemical potential of water is called water
potential. The total kinetic energy of the molecules is called water potential.
|Solute potential :-.
||The decrease in water potential due to dissolution of
solute molecules or ions in water is called solute
||The decrease in the water potential due to affinity of
water molecules with the colloidal substances (protoplasm and cell wall) is called matric potential.
||The turcor pressure (TP) exerted by the vacuole is called pressure potential.
||[he complex composite mass made up of both inorganic and organic. components containing water and air is called soil.
||Relative proportion of the soil particles size is
known as soil texture.
|Run away water
||Some of the water drains away along the slopes
after a lieu\ v rainfall. or irrigation. This is called
run-a um u ater.
|Field capacity of soil
||.1-he amount of 11 at e r retained by soil after the
removal of excess water by gravitation is called ths. field capacity or the water holding capacity of the soil.
|Ilygroscopic water_ .
||Water adsorbed on the surface of soil colloids is called hygroscopic water.
||The ‘sater which fills the spaces between the non
colloidal smallersoil particles is called capillary
||The water level at some depth from the soil where all pore spaces are filled with water is called Water table.
||The amount. of moisture left in the soil after a plant has permanently wilt is called wilting coefficient.
||The movement of water molecules through the adjacent cell walls is called apoplast pathway.
||The movement of water through the protoplast of the plant cells is called symplast pathway.
||The hydrostatic pressure generated in the root which forces the water upward in the stem is called root pressure.
||A glass tube with a narrow bore is called a capillary tube.
|Cohesion tension theory
||This theory states that the negative pressure or pull or suction is created in the leaves as a result of transpiration pulls the water upward.
||The attraction between the water molecules and the cell wall of the xylem cells is called adhesion.
||The evaporation of water from the aerial part of plant is called transpiration.
||Saturation deficit is the difference between the
amount of water vapour actually present in the air and the amount necessary to completely saturate it.
||The amount of moisture actually present in the air is called its absolute humidity
||The percentage of the amount of moisture necessary for saturation at a particular temperature is called relative humidity.