Hi Andrés,

You could probably put the notes inside a \start...\stopxtablefoot

Sylvain

On Tue, 10 Nov 2020 at 21:49, Andres Conrado Montoya <andresconrado@gmail.com> wrote:
MWE (sorry for the long table, I hadn't anything else at hand):

%%%%%%%%%%%%%%%%%%%%
\definehighlight[emph][style={\em}]
\definehighlight[strong][style={\bf}]

\setupfloat[table][default={here}]

\definereferenceformat[figura][text={Figura~}]
\definereferenceformat[tabla][text={Tabla~}]

\setupcaptions[style={\sans\small},
              width=max,
              prefix=no,
              align={flushleft,nothyphenated},
              way=bytext]
\setupcaption[table][location=top]

\setupthinrules[width=15em] % width of horizontal rules

\setupxtable[frame=off,option=stretch,bodyfont=small,foregroundstyle=sans]
\setupxtable[head][topframe=on,bottomframe=on,foregroundstyle=sansbold]
\setupxtable[body][bottomframe=on]
\setupxtable[foot][bottomframe=on]

\define[1]\fuentent{\start\switchtobodyfont[sans,small]#1\par\stop}
\define[1]\fuente{\start\switchtobodyfont[sans,small]\emph{Fuente:}~#1\par\stop}

\starttext
\reference[tbl:t03]{}%
\startplacetable[title={Composición química y valor energético de recursos forrajeros de corte en el área de influencia del Subproyecto Carne Bovina (trópico de altura).}]
\startxtable[option=tight,bodyfont=7pt]
\startxtablehead[head]
\startxrow
\startxcell[align=right,width=.1\textwidth] \strong{Altura\crlf (msnm)} \stopxcell
\startxcell[align=right,width=.28\textwidth] \strong{Gramíneas forrajeras de corte} \stopxcell
\startxcell[align=middle,width=.06\textwidth] \strong{Edad (días)} \stopxcell
\startxcell[align=middle,width=.05\textwidth] \strong{MS (\letterpercent{})} \stopxcell
\startxcell[align=middle,width=.1\textwidth] \strong{PC\crlf  (\letterpercent{} MS)} \stopxcell
\startxcell[align=middle,width=.1\textwidth] \strong{FDN\crlf (\letterpercent{} MS)} \stopxcell
\startxcell[align=middle,width=.1\textwidth] \strong{FDA\crlf (\letterpercent{} MS)} \stopxcell
\startxcell[align=middle,width=.1\textwidth] \strong{EM\crlf {\bfxx (Mcal/kg MS)}} \stopxcell
\startxcell[align=middle,width=.1\textwidth] \strong{ENm\crlf {\bfxx (Mcal/kg MS)}} \stopxcell
\startxcell[align=middle,width=.1\textwidth] \strong{ENg\crlf {\bfxx (Mcal/kg MS)}} \stopxcell
\startxcell[align=middle,width=.1\textwidth] \strong{ENl\crlf {\bfxx (Mcal/kg MS)}} \stopxcell
\stopxrow
\stopxtablehead
\startxtablebody[body]
\startxrow
\startxcell[align=right,ny=2] 1800-1860 \stopxcell
\startxcell[align=right,ny=2] \strong{Cuba 22}\crlf (\emph{P. glaucum} x \emph{P. thyphoides}) \stopxcell
\startxcell[align=middle] 90 \stopxcell
\startxcell[align=middle] 29,0 \stopxcell
\startxcell[align=middle] 10,6 \stopxcell
\startxcell[align=middle] 64,1 \stopxcell
\startxcell[align=middle] 30,8 \stopxcell
\startxcell[align=middle] 1,92 \stopxcell
\startxcell[align=middle] 1,08 \stopxcell
\startxcell[align=middle] 0,52 \stopxcell
\startxcell[align=middle] 1,19 \stopxcell
\stopxrow
\startxrow
\startxcell[align=middle] 210 \stopxcell
\startxcell[align=middle] 27,8 \stopxcell
\startxcell[align=middle] 6,2 \stopxcell
\startxcell[align=middle] 69,1 \stopxcell
\startxcell[align=middle] 33,6 \stopxcell
\startxcell[align=middle] 1,78 \stopxcell
\startxcell[align=middle] 0,94 \stopxcell
\startxcell[align=middle] 0,40 \stopxcell
\startxcell[align=middle] 1,09 \stopxcell
\stopxrow
\startxrow
\startxcell[align=right,ny=3] 1800-2186 \stopxcell
\startxcell[align=right,ny=3] \strong{King Grass} \crlf (\emph{P. purpureum} x \emph{P. typhoides}) \stopxcell
\startxcell[align=middle] 91 \stopxcell
\startxcell[align=middle] 22,3 \stopxcell
\startxcell[align=middle] 8,7 \stopxcell
\startxcell[align=middle] 65,4 \stopxcell
\startxcell[align=middle] 32,1 \stopxcell
\startxcell[align=middle] 1,86 \stopxcell
\startxcell[align=middle] 1,02 \stopxcell
\startxcell[align=middle] 0,46 \stopxcell
\startxcell[align=middle] 1,14 \stopxcell
\stopxrow
\startxrow
\startxcell[align=middle] 150 \stopxcell
\startxcell[align=middle] 23,6 \stopxcell
\startxcell[align=middle] 7,2 \stopxcell
\startxcell[align=middle] 66,9 \stopxcell
\startxcell[align=middle] 32,8 \stopxcell
\startxcell[align=middle] 1,81 \stopxcell
\startxcell[align=middle] 0,98 \stopxcell
\startxcell[align=middle] 0,42 \stopxcell
\startxcell[align=middle] 1,11 \stopxcell
\stopxrow
\startxrow
\startxcell[align=middle] 182 \stopxcell
\startxcell[align=middle] 27,0 \stopxcell
\startxcell[align=middle] 6,7 \stopxcell
\startxcell[align=middle] 68,8 \stopxcell
\startxcell[align=middle] 35,6 \stopxcell
\startxcell[align=middle] 1,77 \stopxcell
\startxcell[align=middle] 0,93 \stopxcell
\startxcell[align=middle] 0,38 \stopxcell
\startxcell[align=middle] 1,08 \stopxcell
\stopxrow
\startxrow
\startxcell[align=right,ny=3] 1800-1850 \stopxcell
\startxcell[align=right,ny=3] \strong{King Grass morado} \crlf (\emph{Pennisetum purpureum}) \stopxcell
\startxcell[align=middle] 98 \stopxcell
\startxcell[align=middle] 20,8 \stopxcell
\startxcell[align=middle] 13,1 \stopxcell
\startxcell[align=middle] 62,3 \stopxcell
\startxcell[align=middle] 30,8 \stopxcell
\startxcell[align=middle] 1,99 \stopxcell
\startxcell[align=middle] 1,14 \stopxcell
\startxcell[align=middle] 0,58 \stopxcell
\startxcell[align=middle] 1,23 \stopxcell
\stopxrow
\startxrow
\startxcell[align=middle] 126 \stopxcell
\startxcell[align=middle] 11,9 \stopxcell
\startxcell[align=middle] 10,3 \stopxcell
\startxcell[align=middle] 64,9 \stopxcell
\startxcell[align=middle] 30,8 \stopxcell
\startxcell[align=middle] 1,92 \stopxcell
\startxcell[align=middle] 1,08 \stopxcell
\startxcell[align=middle] 0,52 \stopxcell
\startxcell[align=middle] 1,18 \stopxcell
\stopxrow
\startxrow
\startxcell[align=middle] 154 \stopxcell
\startxcell[align=middle] 16,3 \stopxcell
\startxcell[align=middle] 7,7 \stopxcell
\startxcell[align=middle] 66,9 \stopxcell
\startxcell[align=middle] 33,3 \stopxcell
\startxcell[align=middle] 1,82 \stopxcell
\startxcell[align=middle] 0,98 \stopxcell
\startxcell[align=middle] 0,43 \stopxcell
\startxcell[align=middle] 1,11 \stopxcell
\stopxrow
\startxrow
\startxcell[align=right,ny=4] 1800-2500 \stopxcell
\startxcell[align=right,ny=4] \strong{Pasto Imperial}\crlf \emph{(Axonopus scoparius)} \stopxcell
\startxcell[align=middle] 42 \stopxcell
\startxcell[align=middle] 15,0 \stopxcell
\startxcell[align=middle] 11,1 \stopxcell
\startxcell[align=middle] 59,5 \stopxcell
\startxcell[align=middle] 27,9 \stopxcell
\startxcell[align=middle] 1,97 \stopxcell
\startxcell[align=middle] 1,12 \stopxcell
\startxcell[align=middle] 0,57 \stopxcell
\startxcell[align=middle] 1,22 \stopxcell
\stopxrow
\startxrow
\startxcell[align=middle] 91 \stopxcell
\startxcell[align=middle] 17,6 \stopxcell
\startxcell[align=middle] 7,0 \stopxcell
\startxcell[align=middle] 61,2 \stopxcell
\startxcell[align=middle] 28,8 \stopxcell
\startxcell[align=middle] 1,84 \stopxcell
\startxcell[align=middle] 1,00 \stopxcell
\startxcell[align=middle] 0,45 \stopxcell
\startxcell[align=middle] 1,13 \stopxcell
\stopxrow
\startxrow
\startxcell[align=middle] 119 \stopxcell
\startxcell[align=middle] 17,6 \stopxcell
\startxcell[align=middle] 5,4 \stopxcell
\startxcell[align=middle] 61,4 \stopxcell
\startxcell[align=middle] 30,4 \stopxcell
\startxcell[align=middle] 1,79 \stopxcell
\startxcell[align=middle] 0,94 \stopxcell
\startxcell[align=middle] 0,40 \stopxcell
\startxcell[align=middle] 1,10 \stopxcell
\stopxrow
\startxrow
\startxcell[align=middle] 150 \stopxcell
\startxcell[align=middle] 21,5 \stopxcell
\startxcell[align=middle] 4,5 \stopxcell
\startxcell[align=middle] 61,7 \stopxcell
\startxcell[align=middle] 31,6 \stopxcell
\startxcell[align=middle] 1,75 \stopxcell
\startxcell[align=middle] 0,91 \stopxcell
\startxcell[align=middle] 0,37 \stopxcell
\startxcell[align=middle] 1,07 \stopxcell
\stopxrow
\startxrow
\startxcell[align=right,ny=2] 1800 \stopxcell
\startxcell[align=right,ny=2] \strong{Pasto Guatemala}\crlf \emph{(Tripsacum dactyloides)} \stopxcell
\startxcell[align=middle] 126 \stopxcell
\startxcell[align=middle] 15,2 \stopxcell
\startxcell[align=middle] 6,6 \stopxcell
\startxcell[align=middle] 67,7 \stopxcell
\startxcell[align=middle] 32,8 \stopxcell
\startxcell[align=middle] 1,79 \stopxcell
\startxcell[align=middle] 0,96 \stopxcell
\startxcell[align=middle] 0,40 \stopxcell
\startxcell[align=middle] 1,10 \stopxcell
\stopxrow
\startxrow
\startxcell[align=middle] 147 \stopxcell
\startxcell[align=middle] 17,8 \stopxcell
\startxcell[align=middle] 6,0 \stopxcell
\startxcell[align=middle] 70,1 \stopxcell
\startxcell[align=middle] 35,2 \stopxcell
\startxcell[align=middle] 1,75 \stopxcell
\startxcell[align=middle] 0,91 \stopxcell
\startxcell[align=middle] 0,37 \stopxcell
\startxcell[align=middle] 1,07 \stopxcell
\stopxrow
\startxrow
\startxcell[align=right,ny=2] 1800-1976 \stopxcell
\startxcell[align=right,ny=2] \strong{Maralfalfa}\crlf \emph{(Pennisetum hybridum)} \stopxcell
\startxcell[align=middle] 63 \stopxcell
\startxcell[align=middle] 20,8 \stopxcell
\startxcell[align=middle] 10,0 \stopxcell
\startxcell[align=middle] 65,8 \stopxcell
\startxcell[align=middle] 31,6 \stopxcell
\startxcell[align=middle] 1,90 \stopxcell
\startxcell[align=middle] 1,08 \stopxcell
\startxcell[align=middle] 0,50 \stopxcell
\startxcell[align=middle] 1,17 \stopxcell
\stopxrow
\startxrow
\startxcell[align=middle] 84 \stopxcell
\startxcell[align=middle] 33,1 \stopxcell
\startxcell[align=middle] 7,0 \stopxcell
\startxcell[align=middle] 71,8 \stopxcell
\startxcell[align=middle] 38,3 \stopxcell
\startxcell[align=middle] 1,75 \stopxcell
\startxcell[align=middle] 0,91 \stopxcell
\startxcell[align=middle] 0,37 \stopxcell
\startxcell[align=middle] 1,07 \stopxcell
\stopxrow
\startxrow
\startxcell[align=right,ny=2] 2167-2500 \stopxcell
\startxcell[align=right,ny=2] \strong{Pasto elefante}\crlf (\emph{Pennisetum purpureum} cv. Merker) \stopxcell
\startxcell[align=middle] $>$~140 \stopxcell
\startxcell[align=middle] 21,0 \stopxcell
\startxcell[align=middle] 7,9 \stopxcell
\startxcell[align=middle] 64,5 \stopxcell
\startxcell[align=middle] 31,8 \stopxcell
\startxcell[align=middle] 1,84 \stopxcell
\startxcell[align=middle] 1,00 \stopxcell
\startxcell[align=middle] 0,45 \stopxcell
\startxcell[align=middle] 1,13 \stopxcell
\stopxrow
\startxrow
\startxcell[align=middle] 70 \stopxcell
\startxcell[align=middle] 19,9 \stopxcell
\startxcell[align=middle] 16,3 \stopxcell
\startxcell[align=middle] 58,2 \stopxcell
\startxcell[align=middle] 25,4 \stopxcell
\startxcell[align=middle] 2,13 \stopxcell
\startxcell[align=middle] 1,27 \stopxcell
\startxcell[align=middle] 0,70 \stopxcell
\startxcell[align=middle] 1,33 \stopxcell
\stopxrow
\stopxtablebody
\stopxtable
\fuentent{\emph{Nota:} En el cuadro se muestran los resultados de materia seca (MS), proteína cruda (PC), fibra en detergente neutro (FDN), fibra en detergente ácido (FDA), energía metabolizable (EM), energía neta de mantenimiento (ENm), energía neta de ganancia (ENg), y energía neta de lactancia (ENl).\crlf Los resultados del análisis son mostrados en porcentajes (\letterpercent{}) sobre la materia seca (MS) del ingrediente.}
\fuente{Equipo CTA-2, Subproyecto Carne Bovina (2018).}
\stopplacetable

\input knuth
\stoptext

%%%%%%%%%%%%%%%%%%%%%%%%%%%%

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