By-Plant Prediction of Corn (Zea mays L.) Grain Yield using Height and Stalk Diameter

Methods for determining midseason nitrogen (N) rates in corn have used the parameter normalized difference vegetation index (NDVI) and, in some cases, plant height. The objective of this study was to analyze the relationship of stalk diameter along with predictors of yield, including NDVI and plant...

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Published in:Communications in Soil Science and Plant Analysis 2015-03, Vol.46 (5), p.564-575
Main Authors: Kelly, Jonathan, Crain, Jared L., Raun, W. R.
Format: Article
Language:English
Subjects:
By-plant
grain yield
NDVI
stalk diameter
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description Methods for determining midseason nitrogen (N) rates in corn have used the parameter normalized difference vegetation index (NDVI) and, in some cases, plant height. The objective of this study was to analyze the relationship of stalk diameter along with predictors of yield, including NDVI and plant height with grain yield. Five site-years of data were analyzed, where several rows of corn plants were selected, and yield from plants within the row was recorded individually. Measurements of stalk diameter, plant height, and NDVI were taken from growth stages V8-VT. Using a value of stalk diameter × plant height gave the best correlation with grain yield (r 2  = 0.34, 0.55, 0.67; V8, V10, V12, growth stages respectively). This work showed that stalk diameter × plant height was positively correlated with by-plant corn grain yields, and this parameter could be used for refining midseason fertilizer N rates for growth stages V8-V12.
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subjects By-plant
grain yield
NDVI
stalk diameter
title By-Plant Prediction of Corn (Zea mays L.) Grain Yield using Height and Stalk Diameter
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