2007 Crop Nutrient Deficiency Photo Contest Winners

Results of 2007 Crop Nutrient Deficiency Photo Contest

On this page, we highlight winners for each of the four categories. The entries were judged on the overall quality of the image as well as the supporting data provided by entrants.

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Nitrogen

First Place

Nitrogen deficiency in tobacco.
Adriana Elina Ortega of Salta, Argentina, took this shot showing N deficiency in tobacco under no-till cultivation and mulch. Plants had a light green appearance and a definite yellowing of older leaves. Fully developed leaves had 1.79% N total and cured leaves had 1.18% N total.

Second Place N deficient corn submitted by S. Srinivasan Tamil Nadu, India

Third Place N deficient corn submitted by Ryan Stoffregen Illinois, U.S.A.)

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Phosphorus


First Place
Phosphorus deficiency in canola.
Lyle Cowell of Saskatchewan, Canada, noticed this unintended ‘test strip’ in a canola crop that was directseeded into alfalfa stubble. The previous alfalfa crop depleted soil P and, in this case, the farmer ran out of seed-row P fertilizer on the last pass during seeding, causing slow and stunted growth.

Second Place P deficient corn submitted by Nathan Slaton Arkansas, U.S.A.

Third Place P deficient corn submitted by Mr. Syafruddin South Sulawesi, Indonesia.

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Potassium


First Place
Potassium deficiency in bermudagrass
Colin Massey of Arkansas, U.S.A., captured this image of K deficiency in bermudagrass. The crop received no K over a 2-year period. Mean soil test K in 2007 was 82 ppm. Tissue K concentration in 2007 ranged from 0.57% to 1.03% across four harvests. Averaged across harvests, total biomass with no K fertilizer was 59% of yields produced with 560 kg K20/ha applied over the four harvests.

Second Place K deficient soybean submitted by Li Yuying Heilongjiang, China

Third Place K deficient soybean submitted by Nathan Slaton Arkansas, U.S.A.

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Other

First Place
Born deficiency in coconut palm.
P. Jeyakumar of Tamil Nadu, India, took this close-up photo showing B deficiency in a 14-year old coconut palm. The deficiency was confirmed with symptoms such as early shedding of buttons (female flowers), resulting in poor fruit set, plus small and unevenly opened leaves. The developed nuts were also small and malformed. The soil test revealed that B content was very low (less than 0.3 mg/kg). Leaf tissue analysis also registered a lower value of 14 mg/kg.

Second Place Ca deficient banana submitted by Luis Estrada Guatemala

Third Place Fe deficient oilpalm submitted by Nolver Arias Santander, Colombia

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Here are some of the other excellent entries that were received.

Nitrogen

N deficient corn	N deficient corn	N deficient oil palm
N deficient pasture	N deficient rice

Phosphorus

P deficient banana	P deficient corn	P deficient corn
P deficient corn	P deficient tomato

Potassium

K deficient barley	K deficient corn	K deficient oilpalm
K deficient rice	K deficient sugarbeet

Other Nutrients: B, Mg, Zn, Ca

B deficient canola	B deficient soybean	Ca deficient corn
Ca deficient sugarbeet	Fe deficient banana	Fe deficient cashew
Mg deficient corn	S deficient corn	Zn deficient corn
Zn deficient rice	Zn deficient rice