By Scout Nelson
On April 29, 2025, Advancing Nitrogen Smart focused on the importance of understanding the nitrogen cycle in managing soil fertility. This knowledge is essential for farmers aiming to improve nutrient use and crop performance.
The nitrogen cycle includes several key processes: mineralization, immobilization, nitrification, denitrification, and volatilization. Each step determines how nitrogen becomes available–or unavailable–for plant uptake. Understanding these helps growers minimize losses and improve nitrogen efficiency.
“What does 'the nitrogen cycle' mean, and how does it affect your management strategy? In what ways do temperature and moisture slow down or speed up nitrogen's window of usability?”
Moisture and temperature greatly impact how fast nitrogen moves through the cycle. Warmer, wetter conditions typically increase microbial activity, speeding up mineralization and nitrification. On the other hand, excess water can trigger denitrification, leading to nitrogen loss as gas.
Organic matter also plays a vital role. Soils rich in organic content enhance microbial activity, supporting mineralization and better nutrient release. But too much activity can also risk nitrogen loss if not managed carefully.
Inhibitors can help regulate nitrogen transformations. Nitrification and urease inhibitors are most effective when applied at planting or just before fertilization–timing is key. These tools slow down nitrogen loss, especially under wet or variable weather conditions.
“How well do inhibitors work, and when should they be applied? How does organic matter affect the nitrogen cycle?” These are the questions that help shape better nitrogen management strategies.
Farmers who understand the nitrogen cycle can better align application timing, minimize losses, and improve crop nutrient availability. This leads to healthier soil, more efficient fertilizer use, and ultimately, better yields.
Photo Credit - gettyimages-klosfoto
Categories: Minnesota, Crops, Rural Lifestyle