L8&9 Flashcards
1
Q
soil is defined as saline when the electrical conductivity of the saturation paste extract (ECe) exceeds …..?
A
4 dS m–1 equivalent to 40 mM NaCl.
2
Q
Growth and yield of most crops is reduced by salinity, and only………….. are able to handle large amounts of salt without penalty
A
halophytes
3
Q
Why Sodic soils affect plant growth?
A
because roots cannot penetrate layers that are hypoxic or hard
4
Q
Most sodic soils have a pH above??
A
7
5
Q
is a term used to describe thickening of leaf tissues and the resultant increase in the volume of leaf sap
A
Leaf succulency
6
Q
are arguably the most remarkable anatomical feature related to salinity.
A
Salt bladders and glands
7
Q
Salt bladders play an important role as?
A
secondary epidermis to reduce water loss and prevent excessive UV
