MAP 11-52-0 Phosphorus-Rich Starter Fertilizer

Overview

Monoammonium Phosphate (MAP) 11-52-0 is a highly concentrated phosphorus fertilizer, carrying a smaller proportion of nitrogen alongside its dominant phosphorus content. Phosphorus is essential for early root establishment and energy transfer within the plant, which makes MAP a widely used starter fertilizer at the beginning of a crop’s growth cycle. Like the rest of our catalog, it’s produced through the manufacturing and quality-control network described on our Our Process & Sustainability page.

When to Use It

MAP is commonly used with soybean, cotton, canola, and root vegetable crops, where strong early root development sets the foundation for the rest of the season. It is typically applied at or near planting, often in a banded placement close to the seed, to give young plants ready access to phosphorus during the critical establishment period.

Application Guidance

Placement and rate matter for MAP, since phosphorus is relatively immobile in soil and seed-zone salt effects should be managed carefully at higher rates near the seed. As a general reference, growers commonly apply within the range noted above at planting; buyers should confirm exact rates and placement method against local soil test recommendations.