Argentine maize production faces a persistent yield gap of 30 to 40 percent below environmental potential, driven largely by soil nutrient limitations despite favorable soil moisture for the 2026/2027 agricultural campaign. According to María Fernanda Gonzalez Sanjuan, Franco Córdoba, and Esteban Ciarlo of Fertilizar AC, current fertilizer applications fall significantly short of crop demands, capping potential yields across early and late planting windows.
Maize Yield Gaps and Soil Moisture Conditions
The 2026/2027 agricultural season opened with robust soil moisture levels and well-recharged profiles, matching conditions seen in the prior campaign. While genetic evolution among modern hybrids allows successful management from early planting dates through late schedules—helping avoid January water deficits during the critical yield-determination window—water alone cannot maximize output. Fertilizar AC reports that average crop yields remain 30 to 40 percent below what specific environments can achieve, with nutrient deficiencies accounting for the shortfall.
To convert available water into biomass and grain, crops require balanced nutrition spanning nitrogen, phosphorus, sulfur, zinc, and potassium in specific deficient zones. Precise soil diagnosis at planting, specifically measuring nitrate nitrogen (N-NO3-) and anaerobically mineralizable nitrogen (Nan), remains essential for optimizing fertilization strategies. Without targeted applications, producers forfeit a substantial portion of their harvest potential.
Nitrogen Deficits and Yield Ceilings
Nitrogen exerts the greatest overall impact on maize yields, demanding between 18 and 22 kilograms per metric ton of grain produced. High-potential production systems require significantly higher nitrogen availability than many fields currently receive. Assessments conducted by Fertilizar AC indicate that average applied doses, combined with existing soil nitrogen, supply only 120 to 150 kilograms of nitrogen per hectare. This limits maximum yields to between 6,000 and 7,500 kilograms per hectare, leaving a profitable margin for increased nitrogen investment.
Phosphorus Depletion Across Agricultural Soils
Phosphorus levels present a parallel challenge as agricultural soils gradually lose natural fertility through continuous crop removal. Because phosphorus drives root development, early crop establishment, and initial yield determination, its presence is mandatory for high-yield maize production. Soil maps produced by INTA Balcarce, the National University of Mar del Plata, and Fertilizar AC reveal that over 70 percent of planted maize area suffers from phosphorus deficiency, establishing it as a primary constraint for the current campaign.
Frequently Asked Questions
What causes the yield gap in Argentine maize production?
Nutrient limitations account for a substantial share of the 30 to 40 percent deficit between actual farm yields and environmental potential, according to Fertilizar AC data.
How much nitrogen does maize require per ton of grain?
Producing one metric ton of maize requires approximately 18 to 22 kilograms of nitrogen, driving high-potential systems to demand much higher nutrient availability than standard application rates provide.
What percentage of maize land lacks adequate phosphorus?
Soil mapping from INTA Balcarce, the National University of Mar del Plata, and Fertilizar AC shows that over 70 percent of the planted area suffers from phosphorus deficiency.