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European experience with variable rate fertilizer application (VRA)
(Fertilizer and Lime Research Centre, 2013-02)
Modern fertilization strategies handle the amount of applied fertilizer according to the demands of crops and paddocks. Besides agronomic and economic reasons increasingly also environmental sensitivities (soils, water-bodies, ...
Optical sensors for variable rate nitrogen application in dairy pastures
(New Zealand Grassland Association, 2017)
Reducing the amount of nitrogen (N) fertiliser applied to dairy pastures down to agronomically optimised levels would have positive economic and environmental results. The ability of commercially available optical sensors ...
Active light sensing of canopies in crop management: Pastures and arable crops
(Fertilizer and Lime Research Centre, 2015-02)
A field spectrometer with an active light source was tested as a potential canopy sensor for dairy pastures (‘TEC-5’, YARA). To study the applicability of the sensor on pasture for the intensive radiation conditions of NZ ...
Management zone delineation in arable crop systems
(Fertilizer and Lime Research Centre, 2015)
Management Zone Delineation (MZD) could be of increasing importance for its economic and environmental benefits through varying rates of crop inputs to meet site-specific demands across individual ...
Soil inorganic nitrogen in spatially distinct areas within a commercial dairy farm in Canterbury, New Zealand
(New Zealand Grassland Association, 2017)
For precision nitrogen (N) fertilisation of grazed dairy paddocks, soil N distribution needs to be quantified. It is expected that farm infrastructure will affect inorganic-N distribution due to its influence on cow grazing ...
Assessing biomass yield of kale (Brassica oleracea var. acephala L.) fields using multi-spectral aerial photography
(Fertilizer and Lime Research Centre, 2015-02)
Aerial images were taken in June 2014 with a multispectral VIS/NIR camera of the canopy from 14 kale (Brassica oleracea var. acephala L.) fields in Canterbury, New Zealand before this forage was grazed by cows. Images ...