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High input management of narrow row maize production systems

Research Scholar

Matheus do Granja, undergraduate student, Federal University of Lavras (Brazil)
Alex Lindsey, faculty mentor


  • Hometown: São Paulo, Brazil
  • Degrees received: Bachelor of Science in agronomy from Federal University of Lavras, Brazil (in progress).

What is the issue or problem addresses in your research?

Considering the need to increase production on existing land areas, studies that examine which yield factors (for example: yield, disease incidence and nitrogen (N) demand) are affected when the spacing is decreased are needed. Maize produced in narrow row systems (less than 76-cm row spacing) may experience increased disease incidence and more competition for water and nitrogen.

What methodology did you use in your research?

Two different corn hybrids (P0825AM and P0843AM) were planted in 38-cm (narrow) and 76-cm (conventional) row spacings. Each treatment (applied at silking) consisted of a foliar fungicide (rate: 100.88 + 39.23 g ai/ha), a foliar application of N (rate: 6613.02 g N/ha), or a combination of fungicide and foliar N. All treatments were compared with an untreated control. Measurements included a foliar disease severity rating taken the day before application and 14 days after application.

What are the purpose/rationale and implications of your research?

Increase production on existing land areas and manage diseases.