Nozzles for Variable Rate Fertilizer Application

2008 ◽  
Author(s):  
Geetika Dilawari ◽  
Randal K Taylor ◽  
John B Solie ◽  
Praveen Bennur
Keyword(s):  
Fertilizer Application ◽  
Variable Rate

On-the-go variable rate fertilizer application on vineyard using a proximal spectral sensor

2020 ◽  
Author(s):  
Marco Sozzi ◽  
Enrico Bernardi ◽  
Ahmed Kayad ◽  
Francesco Marinello ◽  
Davide Boscaro ◽  
...  
Keyword(s):  
Fertilizer Application ◽  
Variable Rate

scholarly journals Erratum: Van Loon, J., et al. Precision for Smallholder Farmers: A Small-Scale-Tailored Variable Rate Fertilizer Application Kit. Agriculture, 2018, 8, 48

Agriculture ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 258
Author(s):  
Jelle Van Loon ◽  
Alicia B. Speratti ◽  
Louis Gabarra ◽  
Bram Govaerts
Keyword(s):  
Smallholder Farmers ◽  
Fertilizer Application ◽  
Small Scale ◽  
Variable Rate

The authors wish to correct the following erratum in this paper [...]

Mapping Soil Test Phosphorus and Potassium for Variable-Rate Fertilizer Application

jpa ◽  
1994 ◽  
Vol 7 (4) ◽  
pp. 441-448 ◽  
Author(s):  
N. C. Wollenhaupt ◽  
R. P. Wolkowski ◽  
M. K. Clayton
Keyword(s):  
Fertilizer Application ◽  
Soil Test ◽  
Variable Rate ◽  
Phosphorus And Potassium ◽  
Soil Test Phosphorus

scholarly journals Using Site-specific Approaches to Advance Potato Management in Irrigated Systems

2000 ◽  
Vol 10 (3) ◽  
pp. 452-457 ◽  
Author(s):  
Joan R. Davenport ◽  
Mary J. Hattendorf
Keyword(s):  
Sweet Corn ◽  
Agricultural Research ◽  
Farming Systems ◽  
Fertilizer Application ◽  
Variable Rate ◽  
Local Conservation ◽  
Row Crops ◽  
Site Specific ◽  
The Pacific ◽  
Conducting Research

Potatoes (Solanum tuberosum L.) are grown extensively throughout the Pacific northwestern United States as a high value crop in irrigated rotations with other row crops such as wheat (Triticum aestivum L.) and both field and sweet corn (Zea mays L.). Center pivots are the predominant irrigation systems. Soil texture ranges from coarse sands to finer textured silt loams and silts and can vary within one field, particularly in fields with hilly topography. Site specific management is being evaluated as an approach to help to optimize inputs (water, seed, agricultural chemicals) to maintain or enhance yield and reduce potential negative environmental impacts from these farming systems. Currently, variable rate fertilizer application technology and harvest yield monitoring equipment are commercially available for potato. Variable rate seeding and variable rate irrigation water application technologies are developed but not fully commercialized and variable rate pesticide application equipment is in development. At the Irrigated Agricultural Research and Extension Center in Prosser, Wash., we have a team of research scientists, interested individuals from local industry, and other key organizations (e.g. local conservation districts) who are working together to evaluate different site specific technologies, improve the ability to use available tools, and to improve decision-making ability by conducting research both on farm and in research plots.

scholarly journals Precision for Smallholder Farmers: A Small-Scale-Tailored Variable Rate Fertilizer Application Kit

Agriculture ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 48 ◽  
Author(s):  
Jelle Van Loon ◽  
Alicia Speratti ◽  
Louis Gabarra ◽  
Bram Govaerts
Keyword(s):  
Rural Communities ◽  
Precision Agriculture ◽  
Smallholder Farmers ◽  
Nutrient Status ◽  
Fertilizer Application ◽  
Application Rate ◽  
Small Scale ◽  
Variable Rate ◽  
User Friendliness ◽  
The Right

Precision agriculture technology at the hands of smallholder farmers in the developing world is often deemed far-fetched. Low-resource farmers, however, are the most susceptible to negative changes in the environment. Providing these farmers with the right tools to mitigate adversity and to gain greater control of the production process could unlock their potential and support rural communities to meet the increasing global food demand. In this study, a real-time variable rate fertilizer application system was developed and tested as an add-on kit to conventional farm machinery. In the context of low investment costs for smallholder farmers, high user-friendliness and easy installment were the main concerns for the system to be viable. The system used nitrogen (N)-sensors to assess the plant nutrient status on the spot and subsequently adjust the amount of fertilizer deposited according to the plant’s needs. Test bench trials showed that the add-on kit performed well with basic operations, but more precision is required. Variability between N-sensors and metering systems, combined with power fluctuations, created inaccuracies in the resulting application rate. Nevertheless, this work is a stepping stone towards catalyzing the elaboration of more cutting-edge precision solutions to support small-scale farmers to become successful, high producing agro-entrepreneurs.

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