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Year 2018
No. VOL 102(1)

2017 Photo Contest Winners

4R Nutrient Stewardship Category: FIRST PLACE

Localized Placement of Urea to Maize


Ms. Ruth Atchoglo, Agricultural Experimental Station in Lomé, Southern Togo.

Urea is placed in a localized nests beside maize plants 1 month after planting at a rate of 60 kg N/ha. These fertilizer nests should be covered to avoid losses from N volatilization. This placement helps to reduce nutrient losses and improve crop N uptake.

4R Nutrient Stewardship Category: SECOND PLACE

Direct Seeding on the Canadian Prairies


Mr. Lyle Cowell, Northeast Saskatchewan, Canada.

Seed, starter fertilizer, and banded anhydrous ammonia (NH3) combine to efficiently apply fertilizer with minimal soil disturbance. This is the view from on top of a seed cart while a farmer is getting ready to direct seed and fertilize his canola crop in a single pass.

Primary Nutrient Category: FIRST PLACE

Phosphorus Deficiency in Cotton


Dr. Srinivasan Subbiah, Kovilpatti, Tamil Nadu, India.

Rain-fed cotton plant in flowering stage that is growing on black calcareous soil. The leaf nearest to flower has developed interveinal purple pigmentation. The soil test (Olsen-P) revealed a very low (<1.4 mg/kg) P concentration. Leaf tissue analysis was 0.11%.

Primary Nutrient Category: SECOND PLACE

Potassium Deficiency in Cashew


Mr. Rahul Kulkarni, Usgaon, Ponda, Goa, India.

Symptom first appear on the older leaves as yellowing of margins progress towards the midrib. Soils in this region are acidic (pH 6.2), highly weathered, and are deficient in the available potassium.

Secondary Nutrient Category: FIRST PLACE

Magnesium Deficiency in Avocado


Dr. Jaume Cots Ibiza, Oliva, Valencia, Spain.

Leaves show interveinal chlorosis which progressed from the margins of the leaves. This farm has a sandy soil with low soil organic matter and a pH of 7.4. Tissue was low in magnesium (0.32% Mg). Application of Mg fertilizer source at the beginning of sprouting corrected the problem for the remainder of the season.

Secondary Nutrient Category: SECOND PLACE

Magnesium Deficiency in Tomato


Ms. Cristina Pulido Gilabert, Torre Pacheco (Murcia), Spain.

Interveinal chlorosis is visible on mature leaves. Main leaf veins remained green. The site had loamy textured soil (pH 7.4) with low organic matter (0.86%) and high carbonate concentrations (52%). Soil testing indicated 0.23 meq Mg/100g soil. The site had no history of Mg fertilization, but plants improved and the symptoms disappeared with an in-season application of magnesium sulfate.

Micronutrient Category: FIRST PLACE

Boron Deficiency in Mango


Mr. Sandesh Nayak, Farmer Field Near Krishna Ganj, District Sirohi, Rajasthan, India.

Severe fruit cracking symptom attributed to boron deficiency. The deficiency becomes more prominent in summer months when temperatures can reach 44 to 46°C (110 to 115°F) and water availability becomes poor. Soil status was 0.1 mg/kg and plant concentration was 4.5 mg/kg.

Micronutrient Category: SECOND PLACE

Iron Deficiency in Avocado


Dr. Jaume Cots Ibiza, Altea, Alicante, Spain.

Extreme iron chlorosis where the leaves are losing their green appearance. The soil is low in organic matter and has a high concentration of active calcium carbonate (12.5%) and a pH of 7.8. Iron-based fertilizers have not been applied here for a long time. Foliar analysis found an extremely low Fe concentration of 23 ppm. This problem tends to decrease progressively after the application of a EDDHA chelate source of iron.

IPNI. 2018. 2017 Photo Contest Winners. Better Crops 102(1): 34-37.