Phosphorus application rates and farmers’ perceptions of environmental concerns

Fertilizer overapplication remains a persistent challenge in several US watersheds. Farmer attitudes play a key role in nutrient management decisions, but few studies link farmer attitudes to phosphorus(P) fertilizer application rates. This study analyzes survey responses from 1650 Michigan corn farmers to assess P application behaviors and attitudes. The objective is to identify factors influencing P management and evaluate differences between P-overapplying and non-overapplying farmers. Overapplication is based on self-reported P use and soil P levels, and differences are tested using chi-square tests. Results show significant differences in attitudes, perceptions, and management practices between the two groups. Overapplying farmers express greater concern about nutrient runoff, suggesting they may be receptive to interventions. This study emphasizes the need to address P overapplication and improve information dissemination through agricultural consultants, soil testing laboratories, and extension services, as 55% of farmers reported not receiving recent information on P yield response.

Core Ideas

• Farmer attitudes and perceptions are critical factors influencing management practice adoption.
• Self-reported survey data for 1650 corn farmers in Michigan reveal phosphorus (P) fertilizer overapplication.
• Farmers that overapply P fertilizer have different attitudes than other farmers.
• Farmers overapplying P fertilizer indicate higher environmental concerns.