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Browse by Author: John Havlin
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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.

Calculating the Rate of Acidifiers to Lower the pH of North Carolina Soils

By: Luke Gatiboni, David Hardy, John Havlin SoilFacts

Plants differ in their tolerance to soil pH. This publication provides information on determining the target pH for different crops and calculating the appropriate amount of materials to reduce soil pH when necessary.

Soil and Plant Analysis for Apple Trees

By: John Havlin SoilFacts

Nutrient analysis of soil and plant tissue should be an integral part of any tree crop management plan. While this publication was designed for apple growers, the principles outlined here may be easily applied to other tree crops.

Fertility Management

By: John Havlin, Gina Fernandez, Amanda McWhirt

This publication, chapter 11 of the 2023 Southeast Regional Caneberry Production Guide, discusses fertilization and soil fertility for blackberry and raspberry plants.

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.

Use of On-Farm Records for Modifying a Certified Animal Waste Management Plan

By: Steph Kulesza, John Havlin SoilFacts

Changes in the interpretation of North Carolina water quality rules and technical standards allow for the use of on-farm records in the development of waste management plans. This publication describes the use of such records, citing examples. The use of on-farm records can work to an animal producer’s benefit by providing more site-specific information about how an animal waste management system should be operated, particularly with respect to the number of acres of crops necessary to properly utilize the nutrients (mainly nitrogen) in the wastewater.

Site Preparation, Planting, and Establishment

By: Gina Fernandez, Amanda McWhirt, Christine Bradish, John Havlin

This publication, chapter 4 of the 2023 Southeast Regional Caneberry Production Guide, discusses soil testing, nursery stock, and spacing for blackberry and raspberry production.

Soil and Plant Analysis for Christmas Trees

By: John Havlin SoilFacts

Nutrient analysis of soil and plant tissue should be an integral part of any tree crop management plan. While this publication was designed for Christmas tree growers, the principles outlined here may be easily applied to other tree crops.