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2025 North Carolina Agricultural Chemicals Manual

By: College of Agriculture and Life Sciences

This manual, updated every year, covers pesticide use and safety information, chemical application equipment, fertilizer use, insect control, chemical weed control, plant growth regulators, animal damage control and disease control.

Soil Sampling Strategies for Site-Specific Field Management

By: Rob Austin, Luke Gatiboni, John Havlin SoilFacts

This factsheet for farmers describes concepts, terminology, and guidelines concerning soil sampling. Proper testing allows farmers to apply the correct amount of lime and fertilizer to fields.

Starter Phosphorus Fertilizer and Additives in North Carolina Soils: Use, Placement, and Plant Response

By: Luke Gatiboni, David Hardy, Steph Kulesza SoilFacts

Phosphorus (P) is the second most important nutrient in crop production but is often found in relatively low amounts in native soils. Decades of fertilizer application have led to P enrichment of most North Carolina agricultural soils. Excess soil P that leaves agricultural fields via runoff and drainage can cause algal blooms in water resources that lead to impaired drinking water quality and can limit recreational activities. Maintaining adequate soil P levels for crop growth can reduce P runoff, save money, and protect the environment

Changes in the Phosphorus Fertilizer Recommendations for Corn, Soybean, and Small Grains in North Carolina

By: Luke Gatiboni, David Hardy SoilFacts

This publication provides updated recommendations for phosphorus fertilizer application in corn, soybean, and small grains crops. It includes background and historical information about phosphorus critical levels, phosphorus rate recommendations, phosphorus accumulation in soils, and changes in recommendations.

Establishing Nitrogen and Potassium Fertilizer Rates for Floral Hemp Production

By: Maggie Short, Matthew Vann, David Suchoff, Michelle McGinnis, Keith Edmisten, Brian Whipker

This publication provides nitrogen and potassium fertilizer recommendations for optimum floral hemp yield and cannabidiol production while also understanding how nutrient rates affect THC production.

Land Application of Municipal Sludge: Advantages and Concerns

By: Albert Rubin, L. M. Safley, Joe Zublena SoilFacts

This factsheet explains how proper land application of municipal biosolids can protect public health and maintain or improve environmental quality and it encourages the beneficial use of wastes.

How Rising Fertilizer Prices Affect Optimum Nitrogen Rates

By: John Havlin, Geoff Benson SoilFacts

This publication helps farmers decide whether to reduce fertilization rates in order to achieve maximum profits due to increases in nitrogen fertilizer prices.

Sulfur Fertilization of North Carolina Crops

By: Luke Gatiboni, David Hardy SoilFacts

Adequate sulfur is necessary for crops, but there’s no one-size-fits-all recommendation for application in North Carolina. Best management practices take sulfur removal and incidental sulfur inputs for the entire crop rotation, soil type and profile depth layers and soil and plant analysis results.

Soybean Fertilizer Burn

By: Rachel Vann, Donald Stokes

Fertilizer burn can occur to the soybean seed from an in-furrow application and to the foliage from a foliar application. An in-furrow application can cause salt injury or ammonium toxicity to the soybean seed. Fertilizer is somewhat rarely applied to soybeans over-the-crop, however if it is done fertilizer burn can occur depending on source and concentration. This factsheet discusses the symptoms and management of fertilizer burn.

Nitrogen Fertility Management in Organic Tobacco Greenhouse Production

By: David Suchoff, Matthew Vann, Steph Kulesza, Alex Woodley

This publication provides recommendations for managing essential nutrient concentrations when growing organic tobacco in greenhouses using a float system.

Nitrogen Fertility Management in Organic Tobacco Field Production

By: David Suchoff, Matthew Vann, Steph Kulesza, Alex Woodley

This publication provides recommendations for managing essential nutrient concentrations when growing organic tobacco in the field.