Tissue Sampling | University of Maryland Extension

Updated: September 3, 2025

Corn Stalk Nitrate Test (NM-8)

Authors: Patricia Steinhilber - Joshua M. McGrath

This publication provides crucial insights into assessing your corn crop's nitrogen levels at the end of the season. Learn how to identify excess nitrogen and optimize your fertilizer strategies for maximum yield and profitability. The publication offers detailed instructions for sampling and interpretation, helping producers make informed decisions about their nitrogen use. Whether you're managing a grain or silage crop, the CSNT can enhance your nutrient management plan. Authors: Dr. Patricia Steinhilber, Dr. Joshua McGrath; Title: Corn Stalk Nitrate Test (NM-8)

Updated: May 19, 2025

Agricultural Nutrient Management Lab Information

Compare laboratories that conduct manure & other organic material analysis, soil analysis, growing media analysis, and plant tissue analysis.

Updated: April 12, 2022

General Viticulture

Resources

Updated: May 18, 2021

Sample Collection & Preparation for Perennial Fruit Crops

Updated: April 20, 2021

Tissue Sampling For Vineyards

Grapevine nutrition plays a major role in the vineyard, including vegetative vigor, yield, fruit quality, cold hardiness, and longevity, therefore the nutrients in the soil and plant must be monitored and controlled for optimal efficiency. Since this is a constantly changing situation, it is best to set up a regular program of soil and petiole sampling and analysis, so those appropriate amendments can be made to keep the vineyard in vegetative and reproductive balance.