CH Plant Nutrition and Fertilization 2

Question 1

Fertilizer burn on plant roots is primarily caused by high concentrations of which factor?

Accepted Answer

Soluble salts

Answer

Water

Answer

Organic matter

Answer

Carbon dioxide

Question 2

Which fertilizer application method places nutrients directly in the root zone with minimal surface waste?

Accepted Answer

Deep root injection

Answer

Broadcasting

Answer

Foliar spray

Answer

Top dressing

Question 3

Phosphorus in fertilizers is expressed as which chemical compound equivalent on the label?

Accepted Answer

P2O5

Answer

P

Answer

PO4

Answer

H3PO4

Question 4

A soil test reports low potassium. Which symptom would you most likely observe on affected plants?

Accepted Answer

Brown scorching along leaf margins of older leaves

Answer

Purple discoloration of young leaves

Answer

Pale green color of entire plant

Answer

Stunted root growth only

Question 5

Which nutrient application timing is most appropriate for promoting flower and fruit development?

Accepted Answer

High phosphorus prior to flowering

Answer

High nitrogen in early spring

Answer

High nitrogen during fruiting

Answer

High calcium after harvest

Question 6

Soil EC (electrical conductivity) is used in horticulture primarily to measure:

Accepted Answer

Total dissolved salts

Answer

Organic matter content

Answer

Microbial activity

Answer

Soil texture