Global soil‐derived ammonia emissions from agricultural nitrogen fertilizer application: A refinement based on regional and crop‐specific emission factors

2020 ◽  
Author(s):  
Ruoya Ma ◽  
Jianwen Zou ◽  
Zhaoqiang Han ◽  
Kai Yu ◽  
Shuang Wu ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Fertilizer Application ◽  
Emission Factors ◽  
Ammonia Emissions ◽  
Global Soil

scholarly journals Extrapolation of point measurements and fertilizer-only emission factors cannot capture statewide soil NOxemissions

2018 ◽  
Vol 4 (9) ◽  
pp. eaau7373 ◽  
Author(s):  
Maya Almaraz ◽  
Edith Bai ◽  
Chao Wang ◽  
Justin Trousdell ◽  
Stephen Conley ◽  
...  
Keyword(s):  
Spatial Analysis ◽  
Nitrogen Fertilizer ◽  
Fertilizer Application ◽  
Emission Factors ◽  
Sales Data ◽  
The Core ◽  
Working Hypothesis ◽  
Application Rates ◽  
Core Issues

Maazet al. argue that inconsistencies across scales of observation undermine our working hypothesis that soil NOxemissions have been substantially overlooked in California; however, the core issues they raise are already discussed in our manuscript. We agree that point measurements cannot be reliably used to estimate statewide soil NOxemissions—the principal motivation behind our new modeling/airplane approach. Maazet al.’s presentation of fertilizer-based emission factors (a nonmechanistic scaling of point measures to regions based solely on estimated nitrogen fertilizer application rates) includes no data from California or other semiarid sites, and does not explicitly account for widely known controls of climate, soil, and moisture on soil NOxfluxes. In contrast, our model includes all of these factors. Finally, the fertilizer sales data that Maazet al. highlight are known to suffer from serious errors and do not offer a logically more robust pathway for spatial analysis of NOxemissions from soil.

Influence of a BactoFil microbiological preparation on the intensity of infection by Rhizoctonia solani and the effects on sugar beet yield and quality

2012 ◽  
pp. 102-109
Author(s):  
Suzana Kristek ◽  
Andrija Kristek ◽  
Dragana Kocevski ◽  
Antonija K. Jankovi ◽  
Dražen Juriši
Keyword(s):  
Sugar Beet ◽  
Rhizoctonia Solani ◽  
Nitrogen Fertilizer ◽  
Soil Analysis ◽  
Block Design ◽  
Sugar Content ◽  
Pathogenic Fungi ◽  
Fertilizer Application ◽  
Beet Root ◽  
Set Up

The experiment was set up on two types of the soil: Mollic Gleysols (FAO, 1998) and Eutric Cambisols where the presence of pathogenic fungi – sugar beet root decay agent – Rhizoctonia solani has been detected since 2005. In a two year study (2008, 2009), the experiment was set up by completely randomized block design in 4 repetitions and 16 different variants. Two beet varieties, Belinda, sensitive to pathogenic fungi R. solani, and Laetitia, tolerant to pathogenic fungi R. solani), were grown. The microbiological preparation BactoFil was applied in different amounts in autumn and spring. In addition, the nitrogen fertilizer application, based on the results of soil analysis, was varied. The following parameters were tested: amount of infected and decayed plants, root yield, sugar content, sugar in molasses and sugar yield. The best results were obtained by applying the microbiological preparation BactoFil, and by 30% reduced nitrogen fertilizer application. Preparation dosage and time of application depended on soil properties.

Components of test weight of ten varieties of winter wheat grown with two rates of nitrogen fertilizer application

1975 ◽  
Vol 85 (3) ◽  
pp. 559-563 ◽  
Author(s):  
Fiona M. Pushman ◽  
J. Bingham
Keyword(s):  
Winter Wheat ◽  
Protein Content ◽  
Nitrogen Fertilizer ◽  
Ventral Surface ◽  
Fertilizer Application ◽  
Test Weight ◽  
Varietal Differences ◽  
Flour Yield ◽  
Packing Efficiency ◽  
Xylene Separation

SUMMARYVarietal and environmental factors which influence test weight were investigated in a field trial with ten varieties of winter wheat and two rates of nitrogen fertilizer. Varietal differences in test weight were correlated positively with the protein content of the grain and inversely with grain yield but they were not related to 1000-grain weight or to flour yield. Variation in test weight associated with varietal and environmental effects in protein content was due to differences in the density of the grain, as measured by displacement of xylene. Separation into density grades within a sample by a flotation method showed a similar relationship with protein content. There were also varietal differences in packing efficiency of the grain. In the case of Maris Huntsman a poor packing efficiency was considered to stem from morphological features of the floret and developing grain which lead to characteristic transverse folds in the ventral surface of the mature grain. For wheat grown in the United Kingdom, test weight may provide a useful guide to flour yield for samples of one variety but it is likely to be misleading for comparisons between varieties.

Interaction of erect panicle genotype and nitrogen fertilizer application on the source-sink ratio and nitrogen use efficiency in rice

2022 ◽  
Vol 278 ◽  
pp. 108430
Author(s):  
Olusegun Idowu ◽  
Yuanzheng Wang ◽  
Koki Homma ◽  
Tetsuya Nakazaki ◽  
Zhengjin Xu ◽  
...  
Keyword(s):  
Nitrogen Use Efficiency ◽  
Nitrogen Fertilizer ◽  
Fertilizer Application ◽  
Nitrogen Use ◽  
Use Efficiency ◽  
Source Sink
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