Integrative Precision Agriculture Resources
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Robotics will soon become a common reality on farms. This Extension resource helps people to understand the basics of robotics for agriculture and the applications of these new machines.
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Transplanting is the process in which seedlings are transferred from a specific place where they were sown to the soil where they will develop and produce. This process is an extremely important step in fruit and vegetable production as it helps with the initial establishment of the crop. Mechanical transplanters have emerged as important agricultural machines for farmers, and are designed to automate and optimize the transplanting process.
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This circular contains the fundamentals of watermelon irrigation scheduling using the crop water demand method. Decisions regarding the timing, frequency, and amount of water required for a crop are some of the most critical factors in vegetable production. There are numerous irrigation scheduling strategies employed by growers, but the crop water demand method of irrigation management is one of the most reliable and precise ways to schedule irrigation. This method adjusts irrigation events using the crop evapotranspiration, or ETc.
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Pulse width modulation (PWM) technology is becoming a standard option on most new agricultural sprayers because of its ability to precisely regulate both flow rate and pressure over a wide range of travel speeds. This publication provides information on nozzle selection for sprayers equipped with PWM technology, including how to use PWM nozzle selection/tabulation charts, other useful online tools, and considerations for effective pesticide applications.
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Spinner-disc spreaders are commonly used for applying lime and fertilizer to agricultural fields. Uniform and accurate application of lime and fertilizer is essential. Proper setup and calibration of application equipment is important to assess its performance and attain satisfactory results. Even new and well-maintained equipment needs calibration checks regularly before and during the growing season. This is especially important when changing from one type of material or blends to another, when changing application rates, and when altering speeds or other operating conditions.
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This publication provides information on selecting an optimal soil sampling grid size that can accurately depict spatial nutrient variability within the fields in the southeastern US and helps in informing precision site-specific nutrient applications.
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The lack of proper planter setup and maintenance results in common planting mistakes that affects crop stand and yield every year. Growers can easily avoid these mistakes by following a few simple steps at the beginning of the planting season to ensure proper planter setup for maximized field performance. This simple and easy-to-follow checklist provides tips on how to properly set up different planter components to achieve a high and uniform stand establishment across the field. The checklist also includes a visual to identify the components available on a typical row-crop planter.
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Researchers have investigated the issue of mislaid eggs in cage-free housing and the possibility of reducing the incidence of floor eggs through management of lighting, litter and bedding, and nesting space, and the use of robotics. Methods with potential for managing mislaid or floor eggs in cage-free layer houses can be summarized as follows: 1. House-lighting time management: In cage-free aviary systems, lighting management is used to help control floor-access time. According to observations in commercial cage-free layer houses, most floor eggs are laid at first light. Delaying floor access time in the morning may help reduce floor eggs by keeping the birds near the nests for the first few hours of light. 2. Light intensity and distribution: Make sure to provide sufficient light intensity evenly across the litter floor. Increasing the light intensity under the aviary system has been tested to be effective at reducing over 80% of floor eggs. 3. Bedding depth: Scratch areas covered with litter help reduce the risk of feather pecking and cannibalism, and minimize flightiness, for hens living in large flocks. However, deep litter attracts birds to lay eggs on the litter itself. According to research conducted at Iowa State University, reducing litter depth discourages hens from laying eggs on floor of commercial cage-free houses. 4. Nesting space: Nesting behavior is a key priority and important welfare indicator for egg production, so providing hens with safe and secure locations to lay eggs is critical. A good nesting design in cage-free systems facilitates egg collection, minimizes the risk of cloacal cannibalism, and assists food safety and sanitation.
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This publication provides information on pulse width modulation (PWM) technology including its working principle, components, benefits, and best management practices for its optimal utilization on agricultural sprayers. Agricultural sprayers are commonly used for pesticide applications and come in various design types and sizes, including three-point hitch, pull-behind, and self-propelled. During pesticide applications, maintaining a target application rate across the whole field is important for effective pest management. On sprayers with traditional flow-based control systems, the liquid flow rate is regulated to account for ground speed variations by adjusting the spray pressure. However, this becomes an issue when spray pressure reaches outside the narrow operating range of the selected nozzle and results in non-uniform droplet size and pattern. Higher spray pressures at faster travel speeds produce finer droplets which are more prone to spray drift; applications at lower pressures produce coarser spray droplets and reduce spray fan angle. Pulse width modulation technology was developed to overcome this pressure variation issue; pulse width modulation does not rely on spray pressure to regulate system flow rate with changes in ground speed. In pulse width modulation systems, the flow rate is varied by changing the intermittent cycling of the electronically actuated solenoid valves while the system pressure remains constant throughout the boom.
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