Nitrogen deficiency in potatoes - Symptoms & fertilizers for Nitrogen

Reasons
Nitrogen deficiency. Sulfur deficiency, root parasites (eg PCN), deep drilling of tubers, nightfrosts, water shortage or heavy metal toxicity can cause similar symptoms.

Potatoes - Chlorosis

Symptoms
Leaves (right) are stunted and leaves show a uniform chlorotic pale green/yellow colouration

Reasons
Nitrogen deficiency. Sulfur deficiency, root parasites (eg PCN), deep drilling of tubers, nightfrosts, water shortage or heavy metal toxicity can cause similar symptoms.

Potatoes - Growth retardation

Symptoms
Plants on the left side show uniform pale green leaves and stunted growth. Older leaves usually affected first and these then turn yellow and shed early.

Reasons
Nitrogen deficiency. Sulfur deficiency, root parasites (eg PCN), deep drilling of tubers, nightfrosts, water shortage or heavy metal toxicity can cause similar symptoms. Often seen as patches due to poor fertiliser application or soil type

Potatoes - Growth retardation

Symptoms
When nitrogen is deficient, potato leaves are a pale yellowgreen, small in size and drop prematurely. The plant is stunted in growth with only a few thin stems. Yields are low as few tubers are formed.

Reasons
Nitrogen deficiency (right). N is largely needed during leaf formation and then for tuber growth and yield. The right rate and timing of N is important in managing potato yields, tuber size and desired quality characteristics. Sulfur deficiency, root parasites (e.g. PCN), deep drilling of tubers, nightfrosts, water shortage or heavy metal toxicity can cause similar symptoms.

Nitrogen deficiency made worse by

Low or high pH soils
Sandy or light soils (leaching)
Low organic matter
Drought conditions
High rainfall (leaching) or heavy irrigation
Addition or high levels of non-decomposed organic matter/manure (eg straw)
Fast growing crops

Nitrogen is important for

Better crop development
Improved yield

Yara recommended fertilizers for Nitrogen

YaraBela® CAN-27™

Potatoes: General applications of 50-100 lbs of Nitrogen utilizing YaraBela® CAN-27 during early bulking as part of your Nitrogen plan is recommended. This rate supplies fast acting nitrate nitrogen. Rates may vary with location, variety, variety and soil types. Consult with your agronomist for local recommendations.

YaraMila® 15-15-15

Potatoes: General rates of 100-150 lbs of 15-15-15 per acre as a portion of the end NPK requirements. Complement with your N and K applications to meet the remaining needs. YaraMila 15-15-15 is a sulfate of potash based fertilizer, which provides sulfur and helps with quality of tubers. Rates may vary with location, variety and potential yields, consult your local agronomist for further details.

YaraMila® 21-7-14

Potatoes: General rates of 100-150 lbs of 21-7-14 per acre as a portion of the end NPK requirements. Complement with your N and K applications to meet the remaining needs. YaraMila 21-7-14 is a sulfate of potash based fertilizer, which provides sulfur and helps with quality of tubers. Rates may vary with location, variety and potential yields, consult your local agronomist for further details.

YaraLiva® CAN-17™

Potatoes: Apply up to 300-600 lbs YaraLiva® CAN-17/acre as part your total Nitrogen program. Utilizing YaraLiva® CAN-17 for part or all of the nitrogen needs supplies the crop with fast acting nitrate nitrogen and since CAN-17 contains 8.8% Calcium it will provide soluble calcium in proper ratio with nitrate nitrogen. Calcium is important for proper cell division, cell wall strength, and fewer internal disorders and better storability. Consult with your agronomist for local recommendations.

YaraLiva® CN-9®

Potatoes: General applications of 50-100 lb of Nitrogen through CN-9 during early bulking as part of your total Nitrogen plan are recommended. This rate provides fast acting nitrate nitrogen and much needed soluble calcium for tuber quality. Rates may vary with location, variety and potential yields, consult your local agronomist for further details.

YaraLiva® TROPICOTE®

Potatoes: General applications of 50-100 lb of Nitrogen through Tropicote during early bulking as part of your total Nitrogen plan are recommended. This rate provides fast acting nitrate nitrogen and much needed soluble calcium for tuber quality. Rates may vary with location, variety and potential yields, consult your local agronomist for further details.

YaraLiva® UCAN®-17

Potatoes: General applications of 50-100 lb of Nitrogen through UCAN-17 during early bulking as part of your total Nitrogen plan are recommended. This rate provides fast acting nitrate nitrogen and much needed soluble calcium for tuber quality. Rates may vary with location, variety and potential yields, consult your local agronomist for further details.

YaraVera® AMIDAS® 40-0-0

Read more about YaraVera® AMIDAS® 40-0-0