Chien, Sen H.1; Gearhart, M. Mercedes2; Villagarcía, Sven3
1International Fertilizer Development Center, Muscle Shoals, AL 35630. Present address: 1905 Beechwood Circle, Florence, AL 35630. Dr. Sen H. Chien is corresponding author. E-mail: [email protected]
2Honeywell International Inc., Morristown, NJ.
3Universidad Nacional Agraria La Molina (UNALM), Lima, Peru.
Received September 15, 2010.
Accepted for publication April 11, 2011.