How can I set a system of equations to predict biomass using weighted restricted SUR in SAS?

Hi,I´m using PROC SYSLIN in SAS program to set a system of equations to predict biomass in Acacia spp. My goal is to make a weighted restricted SUR fit (or WRSUR, like Parresol, 1999) as there is...

10 February 2015 8,791 3 View