diff --git a/.github/workflows/ersem.yml b/.github/workflows/ersem.yml
index ffc6b29..ea302a7 100644
--- a/.github/workflows/ersem.yml
+++ b/.github/workflows/ersem.yml
@@ -69,6 +69,25 @@ jobs:
               python -m pip install pytest
               pytest github-actions/gotm-fabm-ersem/test_state_variables.py github-actions/gotm-fabm-ersem/test_gotm.py
 
+  test-gotm-testcase-yamls-debian:
+    runs-on: ubuntu-latest
+    steps:
+        - uses: actions/checkout@v2
+        - name: Setup python
+          uses: actions/setup-python@v2
+          with:
+              python-version: '3.x'
+        - name: Installing GOTM-FABM-ERSEM dependences
+          run: ./github-actions/gotm-fabm-ersem/gotm-fabm-ersem-dep-debian.sh
+        - name: Building and installing GOTM-FABM-ERSEM
+          run: |
+              BRANCH=${{ github.head_ref }}
+              ./github-actions/gotm-fabm-ersem/gotm-fabm-ersem-build.sh -b $BRANCH -f '-DCMAKE_Fortran_FLAGS="-fcheck=all"'
+        - name: Running GOTM testcase YAML tests
+          run: |
+              python -m pip install pytest
+              pytest github-actions/gotm-fabm-ersem/test_testcase_yamls.py
+
   build-fabm0d-gotm-ersem-debian:
     runs-on: ubuntu-latest
     steps:
diff --git a/github-actions/gotm-fabm-ersem/gotm-testcase-yaml.sh b/github-actions/gotm-fabm-ersem/gotm-testcase-yaml.sh
new file mode 100755
index 0000000..4d7d934
--- /dev/null
+++ b/github-actions/gotm-fabm-ersem/gotm-testcase-yaml.sh
@@ -0,0 +1,73 @@
+#!/bin/bash
+
+set -euo pipefail
+
+if [ "$#" -ne 1 ]; then
+    echo "Usage: $0 <testcase-yaml>" >&2
+    exit 2
+fi
+
+TESTCASE_YAML="$1"
+if [ ! -f "${TESTCASE_YAML}" ]; then
+    echo "Testcase YAML not found: ${TESTCASE_YAML}" >&2
+    exit 2
+fi
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_DIR="$(cd "${SCRIPT_DIR}/../.." && pwd)"
+SETUPS_DIR="${GOTM_ERSEM_SETUPS_DIR:-${REPO_DIR}/ersem-setups}"
+L4_DIR="${SETUPS_DIR}/L4"
+GOTM_BIN="${GOTM_BIN:-${HOME}/local/gotm/bin/gotm}"
+GOTM_TEST_STOP="${GOTM_TEST_STOP:-2007-02-01 00:00:00}"
+GOTM_CONFIG_FILENAME="gotm.yaml"
+
+if [[ "${TESTCASE_YAML,,}" == *n2o* ]] || grep -Eiq 'n2o|nitrous[_ -]oxide' "${TESTCASE_YAML}"; then
+    GOTM_CONFIG_FILENAME="gotm_n2o.yaml"
+fi
+
+if [ ! -x "${GOTM_BIN}" ]; then
+    echo "GOTM executable not found or not executable: ${GOTM_BIN}" >&2
+    exit 2
+fi
+
+if [ ! -d "${SETUPS_DIR}" ]; then
+    echo "Cloning config repo"
+    git clone https://github.com/pmlmodelling/ersem-setups.git "${SETUPS_DIR}"
+fi
+
+ORIGINAL_GOTM_YAML="$(mktemp "${L4_DIR}/gotm.yaml.original.XXXXXX")"
+TEST_GOTM_YAML="$(mktemp "${L4_DIR}/gotm.yaml.testcase.XXXXXX")"
+GOTM_CONFIG="${L4_DIR}/${GOTM_CONFIG_FILENAME}"
+
+if [ ! -f "${GOTM_CONFIG}" ]; then
+    echo "GOTM config not found for testcase ${TESTCASE_YAML}: ${GOTM_CONFIG}" >&2
+    exit 2
+fi
+
+cp "${L4_DIR}/gotm.yaml" "${ORIGINAL_GOTM_YAML}"
+
+cleanup() {
+    cp "${ORIGINAL_GOTM_YAML}" "${L4_DIR}/gotm.yaml"
+    rm -f "${ORIGINAL_GOTM_YAML}" "${TEST_GOTM_YAML}"
+}
+trap cleanup EXIT
+
+awk -v stop="${GOTM_TEST_STOP}" '
+    /^time:[[:space:]]*$/ { in_time = 1 }
+    /^[^[:space:]]/ && !/^time:[[:space:]]*$/ { in_time = 0 }
+    in_time && /^[[:space:]]+stop:[[:space:]]/ {
+        sub(/stop:.*/, "stop: " stop)
+        updated = 1
+    }
+    { print }
+    END { if (!updated) exit 1 }
+' "${GOTM_CONFIG}" > "${TEST_GOTM_YAML}"
+
+echo "Running GOTM with testcase YAML: ${TESTCASE_YAML}"
+echo "Using GOTM config: ${GOTM_CONFIG_FILENAME}"
+echo "Using temporary gotm.yaml stop date: ${GOTM_TEST_STOP}"
+cp "${TEST_GOTM_YAML}" "${L4_DIR}/gotm.yaml"
+cp "${TESTCASE_YAML}" "${L4_DIR}/fabm.yaml"
+cd "${L4_DIR}"
+
+"${GOTM_BIN}" --ignore_unknown_config
diff --git a/github-actions/gotm-fabm-ersem/test_testcase_yamls.py b/github-actions/gotm-fabm-ersem/test_testcase_yamls.py
new file mode 100644
index 0000000..cbab095
--- /dev/null
+++ b/github-actions/gotm-fabm-ersem/test_testcase_yamls.py
@@ -0,0 +1,42 @@
+"""
+Check that GOTM runs with every testcase YAML configuration.
+"""
+
+import subprocess
+from pathlib import Path
+
+import pytest
+
+
+REPO_DIR = Path(__file__).resolve().parents[2]
+TESTCASE_DIR = REPO_DIR / "testcases"
+RUNNER = Path(__file__).with_name("gotm-testcase-yaml.sh")
+
+YAML_PATTERNS = ("*.yaml", "*.yml")
+TESTCASE_YAMLS = sorted(
+    {path for pattern in YAML_PATTERNS for path in TESTCASE_DIR.rglob(pattern)}
+)
+
+
+def yaml_id(path):
+    return path.relative_to(TESTCASE_DIR).as_posix()
+
+
+@pytest.mark.parametrize("testcase_yaml", TESTCASE_YAMLS, ids=yaml_id)
+def test_gotm_runs_with_testcase_yaml(testcase_yaml):
+    """
+    Run GOTM with an ERSEM testcase YAML copied to the L4 setup.
+    """
+    result = subprocess.run(
+        ["bash", str(RUNNER), str(testcase_yaml)],
+        cwd=REPO_DIR,
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        text=True,
+    )
+
+    assert result.returncode == 0, (
+        f"GOTM failed for {testcase_yaml.relative_to(REPO_DIR)}\n"
+        f"stdout:\n{result.stdout}\n"
+        f"stderr:\n{result.stderr}"
+    )
diff --git a/testcases/ersem-15.06/fabm-ersem-15.06-L4-ben-docdyn-iop-denit.yaml b/testcases/ersem-15.06/fabm-ersem-15.06-L4-ben-docdyn-iop-denit.yaml
index 5875835..545a88f 100644
--- a/testcases/ersem-15.06/fabm-ersem-15.06-L4-ben-docdyn-iop-denit.yaml
+++ b/testcases/ersem-15.06/fabm-ersem-15.06-L4-ben-docdyn-iop-denit.yaml
@@ -285,6 +285,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.04                                            # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                           # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                           # respired fraction of primary production (-)
       qnlc: 0.0042                                         # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.0001                                         # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -351,6 +352,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.04                                            # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                           # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                           # respired fraction of primary production (-)
       qnlc: 0.005                                          # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.000225                                       # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -414,6 +416,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.045                                           # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                           # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                           # respired fraction of primary production (-)
       qnlc: 0.006                                          # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.00035                                        # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -474,6 +477,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.035                                           # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                           # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                           # respired fraction of primary production (-)
       qnlc: 0.0042                                         # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.0001                                         # minimum phosphorus to carbon ratio (mmol P/mg C)
diff --git a/testcases/ersem-15.06/fabm-ersem-15.06-L4-ben-docdyn-iop-n2o.yaml b/testcases/ersem-15.06/fabm-ersem-15.06-L4-ben-docdyn-iop-n2o.yaml
index 27d857a..75b3f55 100644
--- a/testcases/ersem-15.06/fabm-ersem-15.06-L4-ben-docdyn-iop-n2o.yaml
+++ b/testcases/ersem-15.06/fabm-ersem-15.06-L4-ben-docdyn-iop-n2o.yaml
@@ -278,6 +278,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.04                                            # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                           # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                           # respired fraction of primary production (-)
       qnlc: 0.0042                                         # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.0001                                         # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -344,6 +345,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.04                                            # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                           # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                           # respired fraction of primary production (-)
       qnlc: 0.005                                          # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.000225                                       # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -407,6 +409,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.045                                           # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                           # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                           # respired fraction of primary production (-)
       qnlc: 0.006                                          # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.00035                                        # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -467,6 +470,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.035                                           # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                           # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                           # respired fraction of primary production (-)
       qnlc: 0.0042                                         # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.0001                                         # minimum phosphorus to carbon ratio (mmol P/mg C)
diff --git a/testcases/ersem-15.06/fabm-ersem-15.06-L4-ben-docdyn-iop.yaml b/testcases/ersem-15.06/fabm-ersem-15.06-L4-ben-docdyn-iop.yaml
index f59f110..7b92565 100644
--- a/testcases/ersem-15.06/fabm-ersem-15.06-L4-ben-docdyn-iop.yaml
+++ b/testcases/ersem-15.06/fabm-ersem-15.06-L4-ben-docdyn-iop.yaml
@@ -268,6 +268,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.04                                            # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                           # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                           # respired fraction of primary production (-)
       qnlc: 0.0042                                         # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.0001                                         # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -334,6 +335,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.04                                            # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                           # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                           # respired fraction of primary production (-)
       qnlc: 0.005                                          # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.000225                                       # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -397,6 +399,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.045                                           # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                           # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                           # respired fraction of primary production (-)
       qnlc: 0.006                                          # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.00035                                        # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -457,6 +460,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.035                                           # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                           # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                           # respired fraction of primary production (-)
       qnlc: 0.0042                                         # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.0001                                         # minimum phosphorus to carbon ratio (mmol P/mg C)
diff --git a/testcases/ersem-15.06/fabm-ersem-15.06-L4-noben-docdyn-iop.yaml b/testcases/ersem-15.06/fabm-ersem-15.06-L4-noben-docdyn-iop.yaml
index fd49875..e193457 100644
--- a/testcases/ersem-15.06/fabm-ersem-15.06-L4-noben-docdyn-iop.yaml
+++ b/testcases/ersem-15.06/fabm-ersem-15.06-L4-noben-docdyn-iop.yaml
@@ -272,6 +272,7 @@ instances:
       q10: 2.0                                            # Q_10 temperature coefficient (-)
       srs: 0.04                                           # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                          # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                          # respired fraction of primary production (-)
       qnlc: 0.0042                                        # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.0001                                        # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -338,6 +339,7 @@ instances:
       q10: 2.0                                            # Q_10 temperature coefficient (-)
       srs: 0.04                                           # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                          # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                          # respired fraction of primary production (-)
       qnlc: 0.005                                         # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.000225                                      # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -401,6 +403,7 @@ instances:
       q10: 2.0                                            # Q_10 temperature coefficient (-)
       srs: 0.045                                          # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                          # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                          # respired fraction of primary production (-)
       qnlc: 0.006                                         # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.00035                                       # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -461,6 +464,7 @@ instances:
       q10: 2.0                                            # Q_10 temperature coefficient (-)
       srs: 0.035                                          # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                          # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.2                                          # respired fraction of primary production (-)
       qnlc: 0.0042                                        # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.0001                                        # minimum phosphorus to carbon ratio (mmol P/mg C)
diff --git a/testcases/ersem-Blackford2024/fabm-ersem-Blackford2004-L4-ben-stdbac-stdlight.yaml b/testcases/ersem-Blackford2024/fabm-ersem-Blackford2004-L4-ben-stdbac-stdlight.yaml
index fb36f16..18ecf0c 100644
--- a/testcases/ersem-Blackford2024/fabm-ersem-Blackford2004-L4-ben-stdbac-stdlight.yaml
+++ b/testcases/ersem-Blackford2024/fabm-ersem-Blackford2004-L4-ben-stdbac-stdlight.yaml
@@ -256,6 +256,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.05                                            # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.05                                          # excreted fraction of primary production (-)
+      exulim: 0.95                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.1                                           # respired fraction of primary production (-)
       qnlc: 0.00687                                        # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.000428                                       # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -321,6 +322,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.05                                            # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                           # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.25                                          # respired fraction of primary production (-)
       qnlc: 0.00687                                        # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.000428                                       # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -383,6 +385,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.05                                            # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                           # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.25                                          # respired fraction of primary production (-)
       qnlc: 0.00687                                        # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.000428                                       # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -442,6 +445,7 @@ instances:
       q10: 2.0                                             # Q_10 temperature coefficient (-)
       srs: 0.05                                            # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.05                                          # excreted fraction of primary production (-)
+      exulim: 0.95                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.25                                          # respired fraction of primary production (-)
       qnlc: 0.00687                                        # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.000428                                       # minimum phosphorus to carbon ratio (mmol P/mg C)
diff --git a/testcases/ersem-Blackford2024/fabm-ersem-Blackford2004-L4-noben-stdbac-stdlight.yaml b/testcases/ersem-Blackford2024/fabm-ersem-Blackford2004-L4-noben-stdbac-stdlight.yaml
index 315bdd6..9affd10 100644
--- a/testcases/ersem-Blackford2024/fabm-ersem-Blackford2004-L4-noben-stdbac-stdlight.yaml
+++ b/testcases/ersem-Blackford2024/fabm-ersem-Blackford2004-L4-noben-stdbac-stdlight.yaml
@@ -259,6 +259,7 @@ instances:
       q10: 2.0                                        # Q_10 temperature coefficient (-)
       srs: 0.05                                       # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.05                                     # excreted fraction of primary production (-)
+      exulim: 0.95                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.1                                      # respired fraction of primary production (-)
       qnlc: 0.00687                                   # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.000428                                  # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -324,6 +325,7 @@ instances:
       q10: 2.0                                        # Q_10 temperature coefficient (-)
       srs: 0.05                                       # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                      # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.25                                     # respired fraction of primary production (-)
       qnlc: 0.00687                                   # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.000428                                  # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -386,6 +388,7 @@ instances:
       q10: 2.0                                        # Q_10 temperature coefficient (-)
       srs: 0.05                                       # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.2                                      # excreted fraction of primary production (-)
+      exulim: 0.8                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.25                                     # respired fraction of primary production (-)
       qnlc: 0.00687                                   # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.000428                                  # minimum phosphorus to carbon ratio (mmol P/mg C)
@@ -445,6 +448,7 @@ instances:
       q10: 2.0                                        # Q_10 temperature coefficient (-)
       srs: 0.05                                       # specific rest respiration at reference temperature (1/d)
       pu_ea: 0.05                                     # excreted fraction of primary production (-)
+      exulim: 0.95                                    # excreted fraction of primary production due to nutrient stress,maximum=1._rk-self%pu_ea
       pu_ra: 0.25                                     # respired fraction of primary production (-)
       qnlc: 0.00687                                   # minimum nitrogen to carbon ratio (mmol N/mg C)
       qplc: 0.000428                                  # minimum phosphorus to carbon ratio (mmol P/mg C)