Sample Volume Effect on the Determination of Nitrate-Nitrogen in the Soil Profile
Date
Authors
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Research Projects
Organizational Units
Since 1905, the Department of Agricultural Engineering, now the Department of Agricultural and Biosystems Engineering (ABE), has been a leader in providing engineering solutions to agricultural problems in the United States and the world. The department’s original mission was to mechanize agriculture. That mission has evolved to encompass a global view of the entire food production system–the wise management of natural resources in the production, processing, storage, handling, and use of food fiber and other biological products.
History
In 1905 Agricultural Engineering was recognized as a subdivision of the Department of Agronomy, and in 1907 it was recognized as a unique department. It was renamed the Department of Agricultural and Biosystems Engineering in 1990. The department merged with the Department of Industrial Education and Technology in 2004.
Dates of Existence
1905–present
Historical Names
- Department of Agricultural Engineering (1907–1990)
Related Units
- College of Agriculture and Life Sciences (parent college)
- College of Engineering (parent college)
- Department of Industrial Education and Technology, (merged, 2004)
Journal Issue
Is Version Of
Versions
Series
Department
Abstract
A field experiment was conducted to evaluate the effect and reliability of soil sample volume on nitrate-nitrogen (NO3-N) and soil-water content in the soil. Four soil sampling devices (a 20.3-cm power earth auger, a 5.1-cm hand earth auger, a 3.2-cm soil probe and a 1.9-cm soil probe) were used to collect soil samples from 35 conventionally tilled and 35 no-till locations. Soil samples were taken at 30-cm intervals to a depth of 150 cm with each of the four sampling devices and were analyzed for NO3-N and moisture contents. Results of this study indicate that sample volume has no significant effect on determining soil-moisture content. Sample volume also had no effect on NO3-N concentration in the soil water under no-till conditions but had a definite impact on the NO3-N levels in the conventionally tilled soils. Results further indicate that a 5.1-cm diameter sample may best predict the quantity of residual soil NO3-N.
Comments
This article was published in Transactions of the ASAE 32 (1989): 934–938, doi:10.13031/2013.31094. Posted with permission.