ABSTRACT The recommendations of nitrogen (N) fertilization in garlic are still based on different varieties of the current types that are infected with phytopathogenic virus. There are several methods for recommendation of nitrogen (N) fertilization in garlic, but there are no enough methods for N diagnosis in garlic obtained by meristem culture. The objective of this work was to evaluate methods for diagnosing the nutritional status of virus-free garlic subjected to N doses through the use of a specific NO3– […]

The objective of monitoring the adequate nitrogen (N) content in maize is to determine when a nutrient application becomes necessary, since the use of high doses of this nutrient may contaminate superficial and underground waters with nitrate. This experiment was conducted to evaluate the chlorophyll content in leaves, measured by a chlorophyll meter, as an indicator of the N level in maize, at four growth stages, in the state of Rio Grande do Sul, Brazil, during the growing season 1999/2000. […]