our results in the context of feedback, and turn to the implications for galaxy evolution in §\[sec:galaxyevolution\], before summarizing our results in §\[sec:summary\].

Throughout the paper we adopt a flat H$_0$= 70 km s$^{-1}$ Mpc$^{-1}$ concordance cosmology with $\Omega_M=0.3$ and $\Omega_{\rm \Lambda}=$0.7.

Observations and sample selection {#sec:observations}
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Sample selection {#ssec:sample}
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In total, we observed 49 radio galaxies at z$\ge$2 in a suite of observing programs with SINFONI between 2009 and 2012. This corresponds to 32% of the known radio galaxies at z$\gtrsim$2 in the compilation of @miley08. The redshift distribution of our sample is shown in Fig. \[fig:sample\]. All sources are between redshifts z$=$1.4$-$4.8, and most between z$=$2.0 and 3.6. We note a small redshift gap between z$\sim$2.6 and z$\sim$3.0, where no bright line emission falls into the near-infrared atmospheric windows. Sixteen of these sources have already been discussed in our previous publications [@nesvadba06a; @nesvadba07b; @nesvadba08; @collet14a; @collet14b].

Since these targets were selected in a similar way and observed with very similar setups, they form a homogeneous sample with the 33 new targets presented here. For six targets where nuclear broad-line emission was observed in H$\alpha$, @nesvadba11a presented an analysis of their black-hole properties, but not their extended 