Zinc Deficiency in Crop Production

What is zinc (Zn) described as in the context of crop production?

• A macronutrient

• A pesticide

• A micronutrient

• A fertilizer

Which crop is most often observed to have zinc deficiency in New York?

• Wheat

• Corn

• Barley

• Alfalfa

What appearance do plants take on when affected by zinc deficiency?

• Bushy

• Rosette

• Spiky

• Flat

What is a symptom of zinc deficiency in plants?

• Increased chlorophyll content

• Interveinal chlorosis

• Longer internodes

• Larger leaves

What role does zinc play in plant processes?

• It is a pesticide

• It is a constituent in enzymes involved with photosynthesis

• It is a growth hormone

• It is a soil conditioner

What is the effect of low zinc levels on the synthesis of auxin (IAA)?

• Increases IAA production

• Reduces IAA production

• Has no effect on IAA

• Converts IAA to another hormone

What pH level is mentioned as making zinc much less available in soils?

• 5.0

• 6.0

• 7.4

• 8.0

What is a possible cause of zinc deficiency in soils with high phosphorus levels?

• Zinc toxicity

• Phosphorus toxicity

• Calcium deficiency

• Nitrogen deficiency

What type of soils are mentioned as not likely to have lower zinc levels?

• Sandy soils

• Coarse textured soils

• Organic matter rich soils

• Calcareous soils

What is a recommended action if zinc soil test is low and deficiency occurred in previous crops?

• Apply 1 pound of zinc per acre

• Broadcast 8 to 10 pounds of zinc per acre

• Use only phosphorus fertilizers

• Avoid using zinc sulfate