Nutrient and Water Use Efficiency

Authored by: Kefyalew Girma , William R. Raun

Handbook of Soil Sciences Resource Management and Environmental Impacts

Print publication date:  November  2011
Online publication date:  November  2011

Print ISBN: 9781439803073
eBook ISBN: 9781439803080
Adobe ISBN:

10.1201/b11268-18

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Abstract

Nutrient use efficiency (NUE) is an important aspect of plant nutrient management. While discussion of NUE of all essential elements is desirable, because over 108 ton of nitrogen (N) fertilizer is produced annually, 60% of which is used in cereals, we will focus on N as an example of a mobile nutrient from both production and environmental perspectives. Phosphorus (P) will represent immobile nutrients. The importance of spatial and temporal variability on improved nutrient and water use efficiency (WUE) will also be discussed. This will highlight the need for better mid-season management practices that can ultimately decrease nutrient loss from different causes. The approaches used to improve NUE of N and P can be applied to other plant nutrients. Recent technological advances that improve WUE will be further highlighted.

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