Determining Nitrogen Fertilizer Needs for Sugarbeets from Residual Soil Nitrate and Mineralizable Nitrogen

Carter, J.N. and Jensen, M.E. and Bosma, S.M. (1974) Determining Nitrogen Fertilizer Needs for Sugarbeets from Residual Soil Nitrate and Mineralizable Nitrogen. Agronomy Journal. 66(2):319-323.

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Abstract

Soil nitrate and mineralizable nitrogen are used to
predict the root yield potential and N fertilizer needs of
sugarbeets. Predicting the required N fertilizer for optimum
refined sucrose production based on soil test procedures
is needed because inadequate N limits root yield
and high levels of N may reduce both extractable sucrose
and sucrose yield.

Sugarbeets (Beta vulgaris L.) were grown at 14 residual
and fertilizer N rates to determine the root yield, sucrose
percentage, sucrose yield, and N uptake in relation to
the residual, mineralizable, and fertilizer N. A soil test
to measure both the mineralizable and NO₃-N level of a
soil was found to serve as a valuable guide in recommending
N fertilizer for sugarbeets. The amount of N
supplied from mineralizable sources in a uniformly
cropped and fertilized field is expected to remain reasonably
constant if adequate but not excess N fertilizer
is supplied each year to the crop grown. Therefore, repeating
the test for mineralizable N each year may not be
necessary. Determining the amount of NO₃-N in the root
zone, which is now feasible with rapid and accurate
methods of soil analysis, combined with the predetermined
mineralizable N, would increase the accuracy of N fertilizer
recommendations.

Item Type:	Article
NWISRL Publication Number:	0282
Subjects:	Irrigated crops > Sugarbeet Soil > Amendments > Fertilizer Soil > Chemistry > Nitrogen Mass Import - autoclassified (may be erroneous)
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:51
Last Modified:	16 Feb 2017 21:30
Item ID:	256
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/256