RESOURCE

Engineering & Technology for a Sustainable World

Old Drains, New Challenges ... 7
Researchers at the University of Illinois are studying the hydrologic and water quality impacts of tile-drainage networks.

Cluster Criteria ... 9
An optical mass flow sensor has recently been developed by the department of biosystems engineering at Auburn University.

Fertilizer Sense ... 11
Making nitrogen (N) fertilizer recommendations based on inadequate knowledge of a soil's N supply can lead to inefficient N use. Remote sensing techniques that use the crop to indicate its N status could help improve N management.

Streamlining Processes ... 13
Process control problems can be costly for food processors managing expenses associated with raw ingredients and waste streams. These glitches can be solved faster and with less disruption to operations than previous methods by using ultrasonic measurement technologies that perform on-line, real-time, non-invasive product stream monitoring.

INSIDE ASAE

Chinese Engineering Connection ... 19
ASAE and the Association of Overseas Chinese Agricultural, Biological and Food Engineers have entered into a cooperative agreement that will be officially signed at the ASAE Annual International Meeting in July.

A Word From the President ... 20
ASAE's Technical Expertise Database Now Available

2002 Election Results of ASAE Officers ... 21
When They Take Office, Nominations Sought for 2003 ASAE Election

Cooperative Standards Program ... 21
Revised Standards

Environmental Design Student Competition to Showcase On-Site Performance at Joint ASAE-CIGR Meeting in Chicago ... 22

Nebraska Wins Teaching Award ... 22

Professional Development ... 23
Total Maximum Daily Load Environmental Regulations, World Congress of Computers in Agriculture and Natural Resources

Member News ... 24
Richard S. Gates, Claude Laguë, Michael A. Zoebisch, Rodney D. Zimmerman

In Memoriam ... 24
Joel T. Walker

Welcome New Members ... 25

Departments

Update ... 3

Business Briefs ... 15

ASAE Online ... 27

From the Manufacturers ... 28

Personnel Service ... 28

Professional Listings ... 32

Last Word (reader opinion) - Tree Supply and Demand ... 33
How much forest do we need? What types of forests do we need? Where should they be located? Who, or which organization, should take on the challenge at an international level?
These questions must be addressed objectively considering human resources, produced assets and natural capital. Only then can we establish solid policies for forests and for society.

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