Measuring spatially-variable N requirements of maize

An account of a trial to establish the value of crop sensors and geographic co-ordinates to determine variable nitrogen requirements and savings that can be made in nitrogen application rates.

Year of Publication2011

A Crop Circle sensor used to measure plant reflectance - an indicator of leaf chlorophyll and plant nitrogen status - in a commercial crop on Harper Adams’ farm showed great variability in nitrogen requirement. A comparison of the overall nitrogen requirement estimated in this way with the standard application rate suggests that substantial savings are possible using geographic co-ordinates to programme the fertiliser applicator.

This item is categorised as follows

Additional keywords/tags

environmental effects of nitrogennitrogen pollutionprecision agriculture
Error: The remote server returned an unexpected response: (302) Found.

What Next...?

This is a brief summary of an item in the OpenFields Library. This free online library contains items of interest to practitioners and researchers in the agricultural and landbased industries.

In early 2017, OpenFields Library content will be migrated to its successor site, Farming and Food Futures.