Using Leaf Chlorophyll Meter to Predict Nitrogen Status and Yield of Grapefruit Trees

Nitrogen Nutrition in Relation to Yield and Quality of Grapefruit.

Investigations at this and other stations have shown generally that nitrogenous fertilizers exert considerable influence in increasing the yields of grapefruit and other citrus fruits. The factors affecting quality of grapefruit and the relation of nitrogen nutrition to quality have not yet been fully studied with the result that orchard management practices, particularly in Arizona, cannot be ...

Chlorophyll Meter Assessments of Corn Response to Nitrogen Management Practices

Modification of yield and chlorophyll content in leaf lettuce by HPS radiation and nitrogen treatments.

This study evaluated the potential of high photosynthetic photon flux (PPF) from high-pressure sodium (HPS) lamps, alone or in combination with metal halide (MH) plus quartz iodide (QI) incandescent lamps, to support lettuce growth, with or without N supplementation. Varying exposures to radiation from combined HPS, MH, and QI lamps influenced dry weight gain and photosynthetic pigment content...

In Situ Measurement of Pecan Leaf Nitrogen Concentration using a Chlorophyll Meter and Vis-near Infrared Multispectral Camera

Knowledge of foliar nitrogen (N) concentration is important in pecan [Carya illinoinensis (Wang.) K. Koch] management protocols. Lower cost and/or rapid methods to determine foliar N are desirable and may result in improved management strategies as well as enable precision agricultural practices to be deployed in pecan production. This study investigates using a portable chlorophyll meter and V...

Leaf relative chlorophyll content as an indicator parameter to predict nitrogen fertilization in maize

This manuscript was extracted from the first author’s Thesis in Crop Science. Engenheiro Agrônomo, Doutor, Desenvolvimento de Produtos Syngenta Seeds Ltda. Av. Bento Gonçalves, 7712, 90001-970, Porto Alegre, RS. Departamento de Plantas de Lavoura. E.mail: [email protected]. Corresponding author. Engenheiro Agrônomo, Doutor, Professor, Departamento de Plantas de Lavoura da Faculdade de...