functions and deficiency's of major nutrients

Question 1

What two ways does nitrogen uptake as

Answer 1

Mainly Nitrate (NO3)- but also ammonium (NH4)+

Question 2

What leaves is Nitrogen deficiency seen on

Answer 2

older leaves

Question 3

symptoms of nitrogen deficiency

Answer 3

stunted root and shoot, yellowing of older leaves, few branch stems, early ripening

Question 4

if nitrogen deficiency is due to restricted up take then what may the symptoms be associated with

Answer 4

Magnesium

Question 5

what soils are most likely to suffer from nitrogen deficiency

Answer 5

Sandy soils in high rainfall areas

Question 6

Nitrogen is a constituent of what (two answers)

Answer 6

all proteins and chlorophyll

Question 7

phosphorus is a constituent of

Answer 7

nucleic acids (genes)

Question 8

what is phosphorus is needed for

Answer 8

root growth, germination, seed formation

Question 9

which leaves is phosphorus deficiency seen on

Answer 9

older leaves (and potato seedlings)

Question 10

symptoms of phosphorus deficiency

Answer 10

poor growth, stunted root and shoot, spring crops can show overall reddening of leaves

Question 11

which soils is phosphorus deficiency most likely to be seen on

Answer 11

Alkaline soils with a very low ph.

Question 12

what does potassium do in the plant

Answer 12

speeds up chemical changes, controls water loss, regulates cell water content and turgor

Question 13

which leaves is potassium deficiency seen on

Answer 13

older leaves

Question 14

symptoms of potassium deficiency

Answer 14

older leaves have scorched tips, bleaching/chlorosis of cereal leaf tips, stunted plants, few branch stems

Question 15

which soils are most likely to show potassium deficiency

Answer 15

sandy/chalky in a high rainfall area