This article describes the three main pathways of nitrogen loss--nitrate leaching, denitrification, and volatilization--and summarizes requirements and provides nitrogen management guidance.
Nitrogen (N), an element that literally surrounds us, changes in form and chemistry almost continuously and moves from one location to another without our notice.
The Pre-sidedress Soil Nitrate Test (PSNT) for Corn is an in-season tool to assess the soil nitrogen (N) supply during the growing season and determine sidedress N application rates that optimize crop production.
Nitrogen (N) management is one of the most difficult decisions in corn production because of the many factors that influence nitrogen behavior, including materials, timing, and, especially, weather.
Phosphorus is a macronutrient and component of nucleic acids, and plays a vital role in plant reproduction, of which grain production is an important result.
Phosphorus is an essential element for plant and animal growth, but too much of it can accelerate the natural aging of lakes and streams.
Gives descriptions of factors and how to determine them in developing a nitrogen-based nutrient management plan that will then be evaluated using the Phosphorus Index provided.
Starter fertilizers enhance the development of emerging seedlings by supplying essential nutrients in accessible locations near the roots.
A corn crop takes up nearly as much potassium (K) as it does nitrogen (N), yet management of each nutrient is entirely different.
Soil acidity is among the important environmental factors which can influence plant growth, and can seriously limit crop production.
Soil testing has been a recommended management practice for Pennsylvania crop producers by agronomists, extension agents, and crop consultants for years. Of the many crop management practices soil testing is one of the simplest and least expensive to implement. Surprisingly, however, the practice of a consistent soil-testing program is not part of the overall crop management program on many Pennsylvania farms.
From Penn State Ag Analytical Services Laboratory. Includes: sample tests and forms, lime and magnesium recommendation tables, soil test recommendations based on crop, and yearly soil test summaries.
University of Delaware
