Growth Stages And Nutrients Required

Question 1

Germination

Zaddock stage - 0-9

Answer 1

None as all energy is supplied by the seed

Plant also has immature roots so can’t access soil nutrients

Question 2

Seeding Growth

Zaddock Stage - 10-19

Answer 2

Z10- 1st cotyledon becomes apparent
Z19- is leafy stage before first tiller emerges
Major requirement for N
P, S needed in smaller amounts
Also require small amounts of moly, zinc, manganese

Question 3

Tillering

Zaddock stage - 20-29

Answer 3

All crops require large amounts of NKS
P demand is lower but still needed for photosynthesis
90% of yield potential is determined at this stage
Tissue test

Question 4

Stem Elongation

Zaddock stage: 30-39

Answer 4

Massive demand for N, K, S

Micro nutrients required for the next stage are applied

Question 5

Booting

Zaddock stage: 40-49

Answer 5

Flag leaf is being pushed up inside stem of plant
Require large amounts of P, K, S, CU, MO
Grain quality is determined

Question 6

Ear Emergence

50-59

Answer 6

Grain head pushing through top of sheath

Requirement of N, P, K

Question 7

Flowering

Zaddock stage: 61-69

Answer 7

High requirement of N, P, Mg, Boron

Question 8

Milk Development

Zaddock stage:70-79

Answer 8

Heads have fully developed and now grain fills occurs

Plant still drawing on micro nutrients such as Mg, Mo, Zn, Cu

Question 9

Dough

Zaddock stage: 80-89

Answer 9

Nutrient demand is starting to decrease as plant is almost mature
Demand continues primarily for P and N

Question 10

Ripening

Zaddock stage: 90-99

Answer 10

Still some demand for n and P but the demand for nutrients is decreasing