Hi Quinn,

On VFP:

SELECT plot,species_98, sum(ba_98) sumba98 FROM trees GROUP BY 1,2 INTO CURSOR temp

SELECT plot, max(sumba98) maxsumba98 FROM temp GROUP BY 1 INTO CURSOR result

SELECT temp.* FROM temp JOIN result ON temp.plot=result.plot AND temp.sumba98=result.maxsumba98 INTO CURSOR result

Fabio