Document Type

Other

Publication Date

1-1-1989

Keywords

nitrogen, crops, nitrogen fertilizer

Extension Number

ExEx 8010

Department

Plant Science

Description

Nitrate Nitrogen (NO₃-N) in the top 2 ft of soil is normally used as efficiently by crops as fertilizer nitrogen. Therefore when nitrogen fertilizer recommendations are made, the NO₃-N soil test level is subtracted from the total nitrogen requirement of the crop. The nitrogen required by most crops grown in South Dakota has been determined by extensive field calibration studies over the past 20 years by SDSU soils researchers (Table 1).

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