Start Date

1-12-1994 12:00 AM

Description

The leaf nitrogen (N) concentration of com is related to the amount of chlorophyll in the leaf, and it may be possible to use a portable chlorophyll meter to estimate whether a crop is deficient in N and, when calibrated, to estimate the amount of N fertilizer required to attain optimum yield if the reading is below the critical value. Taking chlorophyll readings on the plant allows sampling in fields fertilized with injected N before planting. With the technology currently available it may be possible to walk through a field taking random chlorophyll readings and to predict if additional fertilizer is required; if so, the quantity could be figured out within minutes of walking out of the field. The objective of the experiments reported here was to find if the chlorophyll content of V6 com leaves can be used as a measure of the N fertilizer needs of the crop growing in fields injected with N fertilizer before planting.

DOI

https://doi.org/10.31274/icm-180809-467

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Dec 1st, 12:00 AM

Use of Portable Chlorophyll Meters to Predict Sidedress in Requirements for Corn

The leaf nitrogen (N) concentration of com is related to the amount of chlorophyll in the leaf, and it may be possible to use a portable chlorophyll meter to estimate whether a crop is deficient in N and, when calibrated, to estimate the amount of N fertilizer required to attain optimum yield if the reading is below the critical value. Taking chlorophyll readings on the plant allows sampling in fields fertilized with injected N before planting. With the technology currently available it may be possible to walk through a field taking random chlorophyll readings and to predict if additional fertilizer is required; if so, the quantity could be figured out within minutes of walking out of the field. The objective of the experiments reported here was to find if the chlorophyll content of V6 com leaves can be used as a measure of the N fertilizer needs of the crop growing in fields injected with N fertilizer before planting.

 

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