Con el objeto de conocer las concentraciones sanguíneas de Triyodotironina (T3) y Tiroxina (T4) en vacas lecheras en el sur de Chile, se seleccionaron 110 muestras de sangre de vacas Frison Negro, 55 pertenecian a vacas al inicio de lactancia y 55 a vacas en el período final de gestación.

This paper presents and discusses the results of the IAR/ILRI (Institute of Agricultural Research/International Livestock Research Institute) Dairy-Draft Project study which was carried out to examine the performance of F1, Boran X Friesian crossbred cows both in terms of traction and milk, to ex

Dipterocarps are one of the best known and commercially important groups of tropical trees. They preside over some of the most magnificent forest formations in the world. Exploitation of dipterocarp-dominated tropical rain forests has expanded rapidly in the past 20 years.

The current study was conducted in Cameroon from July 1996 to June 1997.