Predicting Nitrogen Fertilizer Needs for Sugarbeets from Residual Nitrate and Mineralizable Nitrogen

Carter, J.N. and Westermann, D.T. and Jensen, M.E. and Bosma, S.M. (1975) Predicting Nitrogen Fertilizer Needs for Sugarbeets from Residual Nitrate and Mineralizable Nitrogen. Journal of the American Society of Sugar Beet Technologists. 18(3):232-244.

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Abstract

Nitrogen (N) fertilizer management for sugarbeet (Beta vulgaris L.) production requires more precise information than for most crops. Inadequate N limits plant growth and root yield, but excess N may reduce both sucrose percentage and recoverable sucrose (7). Also, excess N may stimulate more leaf growth than necessary. The rate and timing of N fertilizer applications are not only important in supplying crop N needs, but can influence the amount of N lost by leaching and denitrification. Soil and plant tissue tests can provide essential data For decision-making for efficient and economical use of N fertilizer. Recent studies have shown that the NO?-N level in the soil before planting is closely related to sucrose production when N is limiting (8, 12). Inclusion of the N mineralization capacity of the soils would be expected to improve the relationship. Stanford and Smith (14) showed that the mineralization capacity varies with soil type and location. Therefore, a soil test for N that would have general applicability should include the mineralization capacity of the soil, and the interpretation of these tests should include some knowledge of expected irrigation practices. A soil test for NO?-N may suffice as an index of N fertilizer needs for a given soil and irrigation level. Recently, Carter et al. (5) showed that sucrose production was closely related to available soil N, as indicated by a soil test that included both mineralizable N and NO?-N. The objective of our study was to evaluate the soil test-yield relationship, developed from experimental data at one location in south central Idaho, for predicting N fertilizer needs throughout southern Idaho under various irrigation management practices.

Item Type: Article
NWISRL Publication Number: 0314
Subjects: Irrigated crops > Sugarbeet
Soil > Amendments > Fertilizer
Mass Import - autoclassified (may be erroneous)
Depositing User: Dan Stieneke
Date Deposited: 20 Nov 2010 21:51
Last Modified: 15 Feb 2017 22:38
Item ID: 276
URI: https://eprints.nwisrl.ars.usda.gov/id/eprint/276

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