TY  - JOUR
T1  - Nitrogen Variability: A Need for Precision Agriculture
AU - Haggard, B. AU - Weindorf, D.C. AU - Lofton, J. AU - Tubana, B. 
JO  - Agricultural Journal
VL  - 5
IS  - 1
SP  - 6
EP  - 11
PY  - 2010
DA  - 2001/08/19
SN  - 1816-9155
DO  - aj.2010.6.11
UR  - https://makhillpublications.co/view-article.php?doi=aj.2010.6.11
KW  - site-specific management
KW  -precision farming
KW  -remote sensing
KW  -precision agriculture
KW  -temporal variability
KW  -spatial variability
KW  -Nitrogen
KW  -nitrogen use efficiency
KW  -Greenseeker™
KW  -Crop Circle™
AB  - Nitrogen (N) variability can have a negative impact on many production practices as well as having a negative influence on the environment. Nitrogen can be highly variable, both spatially and temporally. This is due to the N cycle being such a dynamic system. Producers have to change management practices to account for this variability. One way to manage N variability is the implementation of precision management practices. Scale of N variability is important, when implementing precision management. In some sites, the resolution of N variability is too fine to implement traditional precision agriculture management, such as management zone soil sampling, therefore remote sensing needs to be implemented. Many ground-based remote sensors are able to detect fine resolution differences however, delays between sensing and implementing management practices makes them flawed. Therefore, on-the-go sensors that indirectly measure nutrient status by plant tissue can be utilized to minimize this downtime. Many of these sensors are available, such as the Greenseeker™ and the Crop Circle™. Implementing these practices has been shown to increase the N use efficiency in crops therefore increasing potential yield and decreasing environmental hazards.
ER  -