functions and deficiency's of trace elements 3

Question 1

what is calcium needed for

Answer 1

helps to form the cell wall between cell, neutralises acids

Question 2

which leaves is calcium deficiency seen on

Answer 2

younger leaves, often seen as internal rust spot in potatoes

Question 3

symptoms of calcium deficiency

Answer 3

young leaves roll back at margins, growing point dies, leaf stalks break, pods twisted (beans)

Question 4

which soils are most likely to have a calcium deficiency

Answer 4

sandy in a high rainfall area

Question 5

what is magnesium needed for in the plant

Answer 5

its a constituent of enzymes (90%) and of chlorophyll (10%)

Question 6

which leaves is magnesium deficiency seen on

Answer 6

older leaves

Question 7

which crops would magnesium deficiency usually be seen on

Answer 7

sugar beet, potatoes and vegetables

Question 8

symptoms of magnesium deficiency

Answer 8

older leaves turn yellow between the veins

Question 9

which soils would be most likely to show magnesium deficiency

Answer 9

sandy in a high rainfall area,over limed soils, soils that have had excessive potassium added

Question 10

what is sulphur needed for in the plant

Answer 10

constituent of proteins and essential oils (glucosinolates) in brassicas

Question 11

what does sulphur uptake as

Answer 11

(SO4)2-

Question 12

which leaves is sulphur deficiency seen on

Answer 12

younger leaves

Question 13

which crops is sulphur deficiency often seen on

Answer 13

multi cut silage, OSR, cereals

Question 14

symptoms of sulphur deficiency

Answer 14

interveinal chlorosis of young leaves in OSR, general paling of cereal leaves, can easily be confused with nitrogen deficiency in cereals and grass

Question 15

which soils are most likely to show a sulphur deficiency

Answer 15

sandy in a high rainfall area