Development of methods for remotely sensing grass growth to enable precision application of nitrogen fertilizer
| Autor: | P.M. Berry, H.F. Holmes, C. Blacker |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Field experiment chemistry.chemical_element Soil science 04 agricultural and veterinary sciences General Medicine 01 natural sciences Nitrogen Crop Nitrogen fertilizer chemistry Recovery rate Agronomy Yield (wine) 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Remotely sensing Hectare 010606 plant biology & botany |
| Zdroj: | Advances in Animal Biosciences. 8:758-763 |
| ISSN: | 2040-4700 |
| DOI: | 10.1017/s2040470017000863 |
| Popis: | A ‘chessboard’ field experiment set up to investigate how the yield response to nitrogen (N) fertiliser varied spatially within a field in the UK indicated that the optimum N rate varied substantially by up to 100 kg N/ha within the three hectare experimental area. Variation in N optima was negatively related to the soil N supply. However, soil N supply, yield potential and apparent fertiliser recovery rate were inter-related which meant that the influence of each element on N optima was complex. Spectral reflectance indices related well to crop N uptake and could be used to help estimate soil N supply. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|