Crop and Soil Sciences
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Occasionally, turfgrass areas begin to thin out and moss and algae start to form. These primitive plants develop because conditions for growing dense, healthy turf have declined. This publication gives you preventive practices and chemical suppression tips for controlling moss and algae in turf.
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This publication is a monthly guide for professional managers of commercial, recreational, municipal, institutional or private grounds in Georgia.
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This planting guide will help producers establish grasses and legumes commonly grown in Georgia.
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This publication discusses the proper calibration methods sprayers and other liquid applicators.
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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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Boom sprayer calibration using conventional methods (catching flow for certain time or distance) for large (60-90 ft; 54-72 nozzles) boom sprayers can be a time-consuming process. This short publication outlines steps to take to verify nozzle output and calibrate a boom sprayer, including tables with useful information on flow rates at multiple speeds for two common nozzle spacings and an equation for calculating rates if needed.
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These irrigation budgets, developed by University of Georgia Cooperative Extension, are estimates of the irrigation costs of a center pivot irrigation system located in southeast Georgia. Our intention is to provide flexible, user-friendly irrigation budgets with default values. That being said, the variation among different farm conditions can impact investment costs and annual costs associated with irrigation; users are suggested to modify these default values and customize their budgets according to their specific field conditions. Please consult your irrigation providers for properly designed center pivot systems that match well production to achieve your irrigation goals. This should serve as a generalized user guide for irrigation budgets and provide guidance for adjusting the default values in the budgets.
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Grazon® P+D (picloram + 2,4-D) injury, diagnosed as leaf roll, is occasionally observed in Georgia peanut fields due to the presence of contaminated soil, forage, animal waste (manure/urine), and/or irrigation water. Since peanut plants are very tolerant of low levels of 2,4-D, the primary cause of these leaf roll symptoms is picloram. When this injury occurs, growers are often concerned about how it can potentially influence final peanut yield.
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The quality of drinking water from wells may be compromised during a flood. Flooding around the well increases the risk of drinking water becoming contaminated with bacteria or any other contaminants, rendering it unsafe to drink and for washing food items. This publication describes the steps to take when you suspect that your well has been affected by flooding. Steps include well inspection, calculation of the depth of water and storage capacity of the well, shock chlorination, and laboratory bacteria testing. The circular also discusses tips on how to know whether the water is safe to drink again.
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