diff --git a/CHANGELOG.md b/CHANGELOG.md
index 20691f6..d392b59 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,23 @@ All notable changes to WuttaFarm will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## v0.12.1 (2026-05-31)
+
+### Fix
+
+- allow null for `Quantity.measure` field
+
+## v0.12.0 (2026-05-30)
+
+### Feat
+
+- add support for Compost Assets
+
+### Fix
+
+- fix Location column for All Logs subgrid when viewing Asset
+- sort related assets field when viewing a log
+
 ## v0.11.4 (2026-05-30)
 
 ### Fix
diff --git a/pyproject.toml b/pyproject.toml
index 6956f88..16c7c60 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "WuttaFarm"
-version = "0.11.4"
+version = "0.12.1"
 description = "Web app to integrate with and extend farmOS"
 readme = "README.md"
 authors = [
diff --git a/src/wuttafarm/db/alembic/versions/a240a1449de9_add_compostasset.py b/src/wuttafarm/db/alembic/versions/a240a1449de9_add_compostasset.py
new file mode 100644
index 0000000..902cf0c
--- /dev/null
+++ b/src/wuttafarm/db/alembic/versions/a240a1449de9_add_compostasset.py
@@ -0,0 +1,102 @@
+"""add CompostAsset
+
+Revision ID: a240a1449de9
+Revises: dd4d4142b96d
+Create Date: 2026-05-30 21:12:36.464851
+
+"""
+
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+import wuttjamaican.db.util
+
+
+# revision identifiers, used by Alembic.
+revision: str = "a240a1449de9"
+down_revision: Union[str, None] = "dd4d4142b96d"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+
+    # asset_compost
+    op.create_table(
+        "asset_compost",
+        sa.Column("uuid", wuttjamaican.db.util.UUID(), nullable=False),
+        sa.ForeignKeyConstraint(
+            ["uuid"], ["asset.uuid"], name=op.f("fk_asset_compost_uuid_asset")
+        ),
+        sa.PrimaryKeyConstraint("uuid", name=op.f("pk_asset_compost")),
+    )
+    op.create_table(
+        "asset_compost_version",
+        sa.Column(
+            "uuid", wuttjamaican.db.util.UUID(), autoincrement=False, nullable=False
+        ),
+        sa.Column(
+            "transaction_id", sa.BigInteger(), autoincrement=False, nullable=False
+        ),
+        sa.Column("end_transaction_id", sa.BigInteger(), nullable=True),
+        sa.Column("operation_type", sa.SmallInteger(), nullable=False),
+        sa.PrimaryKeyConstraint(
+            "uuid", "transaction_id", name=op.f("pk_asset_compost_version")
+        ),
+    )
+    op.create_index(
+        op.f("ix_asset_compost_version_end_transaction_id"),
+        "asset_compost_version",
+        ["end_transaction_id"],
+        unique=False,
+    )
+    op.create_index(
+        op.f("ix_asset_compost_version_operation_type"),
+        "asset_compost_version",
+        ["operation_type"],
+        unique=False,
+    )
+    op.create_index(
+        "ix_asset_compost_version_pk_transaction_id",
+        "asset_compost_version",
+        ["uuid", sa.literal_column("transaction_id DESC")],
+        unique=False,
+    )
+    op.create_index(
+        "ix_asset_compost_version_pk_validity",
+        "asset_compost_version",
+        ["uuid", "transaction_id", "end_transaction_id"],
+        unique=False,
+    )
+    op.create_index(
+        op.f("ix_asset_compost_version_transaction_id"),
+        "asset_compost_version",
+        ["transaction_id"],
+        unique=False,
+    )
+
+
+def downgrade() -> None:
+
+    # asset_compost
+    op.drop_index(
+        op.f("ix_asset_compost_version_transaction_id"),
+        table_name="asset_compost_version",
+    )
+    op.drop_index(
+        "ix_asset_compost_version_pk_validity", table_name="asset_compost_version"
+    )
+    op.drop_index(
+        "ix_asset_compost_version_pk_transaction_id", table_name="asset_compost_version"
+    )
+    op.drop_index(
+        op.f("ix_asset_compost_version_operation_type"),
+        table_name="asset_compost_version",
+    )
+    op.drop_index(
+        op.f("ix_asset_compost_version_end_transaction_id"),
+        table_name="asset_compost_version",
+    )
+    op.drop_table("asset_compost_version")
+    op.drop_table("asset_compost")
diff --git a/src/wuttafarm/db/alembic/versions/c30a725b54f9_allow_null_for_quantity_measure_id.py b/src/wuttafarm/db/alembic/versions/c30a725b54f9_allow_null_for_quantity_measure_id.py
new file mode 100644
index 0000000..2c5952d
--- /dev/null
+++ b/src/wuttafarm/db/alembic/versions/c30a725b54f9_allow_null_for_quantity_measure_id.py
@@ -0,0 +1,36 @@
+"""allow null for quantity.measure_id
+
+Revision ID: c30a725b54f9
+Revises: a240a1449de9
+Create Date: 2026-05-30 22:14:21.056993
+
+"""
+
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+import wuttjamaican.db.util
+
+
+# revision identifiers, used by Alembic.
+revision: str = "c30a725b54f9"
+down_revision: Union[str, None] = "a240a1449de9"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+
+    # quantity
+    op.alter_column(
+        "quantity", "measure_id", existing_type=sa.VARCHAR(length=20), nullable=True
+    )
+
+
+def downgrade() -> None:
+
+    # quantity
+    op.alter_column(
+        "quantity", "measure_id", existing_type=sa.VARCHAR(length=20), nullable=False
+    )
diff --git a/src/wuttafarm/db/model/__init__.py b/src/wuttafarm/db/model/__init__.py
index 716fd1c..923f163 100644
--- a/src/wuttafarm/db/model/__init__.py
+++ b/src/wuttafarm/db/model/__init__.py
@@ -53,6 +53,7 @@ from .asset_plant import (
     PlantAssetSeason,
 )
 from .asset_water import WaterAsset
+from .asset_compost import CompostAsset
 from .log import LogType, Log, LogAsset, LogGroup, LogLocation, LogQuantity, LogOwner
 from .log_activity import ActivityLog
 from .log_harvest import HarvestLog
diff --git a/src/wuttafarm/db/model/asset_compost.py b/src/wuttafarm/db/model/asset_compost.py
new file mode 100644
index 0000000..37b5bb5
--- /dev/null
+++ b/src/wuttafarm/db/model/asset_compost.py
@@ -0,0 +1,45 @@
+# -*- coding: utf-8; -*-
+################################################################################
+#
+#  WuttaFarm --Web app to integrate with and extend farmOS
+#  Copyright © 2026 Lance Edgar
+#
+#  This file is part of WuttaFarm.
+#
+#  WuttaFarm is free software: you can redistribute it and/or modify it under
+#  the terms of the GNU General Public License as published by the Free Software
+#  Foundation, either version 3 of the License, or (at your option) any later
+#  version.
+#
+#  WuttaFarm is distributed in the hope that it will be useful, but WITHOUT ANY
+#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+#  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License along with
+#  WuttaFarm.  If not, see <http://www.gnu.org/licenses/>.
+#
+################################################################################
+"""
+Model definition for Compost
+"""
+
+from wuttjamaican.db import model
+
+from wuttafarm.db.model.asset import AssetMixin, add_asset_proxies
+
+
+class CompostAsset(AssetMixin, model.Base):
+    """
+    Represents an compost asset from farmOS
+    """
+
+    __tablename__ = "asset_compost"
+    __versioned__ = {}
+    __wutta_hint__ = {
+        "model_title": "Compost Asset",
+        "model_title_plural": "Compost Assets",
+        "farmos_asset_type": "compost",
+    }
+
+
+add_asset_proxies(CompostAsset)
diff --git a/src/wuttafarm/db/model/quantities.py b/src/wuttafarm/db/model/quantities.py
index 4fa92af..c04f85b 100644
--- a/src/wuttafarm/db/model/quantities.py
+++ b/src/wuttafarm/db/model/quantities.py
@@ -109,7 +109,7 @@ class Quantity(model.Base):
     measure_id = sa.Column(
         sa.String(length=20),
         sa.ForeignKey("measure.drupal_id"),
-        nullable=False,
+        nullable=True,
         doc="""
         Measure for the quantity.
         """,
@@ -192,7 +192,12 @@ class Quantity(model.Base):
             app = config.get_app()
             value = app.render_quantity(value)
         units = str(self.units or "")
-        return f"( {measure} ) {value} {units}"
+
+        if measure:
+            return f"( {measure} ) {value} {units}"
+
+        label = self.label or ""
+        return f"{label} {value} {units}"
 
     def __str__(self):
         return self.render_as_text()
diff --git a/src/wuttafarm/farmos/importing/model.py b/src/wuttafarm/farmos/importing/model.py
index e7ebe23..f351d37 100644
--- a/src/wuttafarm/farmos/importing/model.py
+++ b/src/wuttafarm/farmos/importing/model.py
@@ -574,6 +574,21 @@ class WaterAssetImporter(ToFarmOSAsset):
     ]
 
 
+class CompostAssetImporter(ToFarmOSAsset):
+
+    model_title = "CompostAsset"
+    farmos_asset_type = "compost"
+
+    supported_fields = [
+        "uuid",
+        "asset_name",
+        "is_location",
+        "is_fixed",
+        "notes",
+        "archived",
+    ]
+
+
 ##############################
 # quantity importers
 ##############################
diff --git a/src/wuttafarm/farmos/importing/wuttafarm.py b/src/wuttafarm/farmos/importing/wuttafarm.py
index d60a96f..9792278 100644
--- a/src/wuttafarm/farmos/importing/wuttafarm.py
+++ b/src/wuttafarm/farmos/importing/wuttafarm.py
@@ -99,6 +99,7 @@ class FromWuttaFarmToFarmOS(FromWuttaFarmHandler, ToFarmOSHandler):
         importers["LandAsset"] = LandAssetImporter
         importers["StructureAsset"] = StructureAssetImporter
         importers["WaterAsset"] = WaterAssetImporter
+        importers["CompostAsset"] = CompostAssetImporter
         importers["EquipmentType"] = EquipmentTypeImporter
         importers["EquipmentAsset"] = EquipmentAssetImporter
         importers["AnimalType"] = AnimalTypeImporter
@@ -475,6 +476,16 @@ class WaterAssetImporter(FromWuttaFarmAsset, farmos_importing.model.WaterAssetIm
     source_model_class = model.WaterAsset
 
 
+class CompostAssetImporter(
+    FromWuttaFarmAsset, farmos_importing.model.CompostAssetImporter
+):
+    """
+    WuttaFarm → farmOS API exporter for Compost Assets
+    """
+
+    source_model_class = model.CompostAsset
+
+
 ##############################
 # quantity importers
 ##############################
diff --git a/src/wuttafarm/importing/farmos.py b/src/wuttafarm/importing/farmos.py
index eb82fe1..81fedf0 100644
--- a/src/wuttafarm/importing/farmos.py
+++ b/src/wuttafarm/importing/farmos.py
@@ -107,6 +107,7 @@ class FromFarmOSToWuttaFarm(FromFarmOSHandler, ToWuttaFarmHandler):
         importers["StructureType"] = StructureTypeImporter
         importers["StructureAsset"] = StructureAssetImporter
         importers["WaterAsset"] = WaterAssetImporter
+        importers["CompostAsset"] = CompostAssetImporter
         importers["EquipmentType"] = EquipmentTypeImporter
         importers["EquipmentAsset"] = EquipmentAssetImporter
         importers["AnimalType"] = AnimalTypeImporter
@@ -1033,6 +1034,14 @@ class WaterAssetImporter(AssetImporterBase):
     model_class = model.WaterAsset
 
 
+class CompostAssetImporter(AssetImporterBase):
+    """
+    farmOS API → WuttaFarm importer for Compost Assets
+    """
+
+    model_class = model.CompostAsset
+
+
 class UserImporter(FromFarmOS, ToWutta):
     """
     farmOS API → WuttaFarm importer for Users
diff --git a/src/wuttafarm/web/forms/widgets.py b/src/wuttafarm/web/forms/widgets.py
index db79eae..6897660 100644
--- a/src/wuttafarm/web/forms/widgets.py
+++ b/src/wuttafarm/web/forms/widgets.py
@@ -667,10 +667,17 @@ class AssetRefsWidget(Widget):
 
         readonly = kw.get("readonly", self.readonly)
         if readonly:
+
             assets = []
             for uuid in cstruct or []:
-                asset = session.get(model.Asset, uuid)
-                assets.append(
+                if asset := session.get(model.Asset, uuid):
+                    assets.append(asset)
+
+            assets.sort(key=lambda asset: asset.asset_name)
+
+            html = []
+            for asset in assets:
+                html.append(
                     HTML.tag(
                         "li",
                         c=tags.link_to(
@@ -681,7 +688,8 @@ class AssetRefsWidget(Widget):
                         ),
                     )
                 )
-            return HTML.tag("ul", c=assets)
+
+            return HTML.tag("ul", c=html)
 
         values = kw.get("values", self.values)
         if not isinstance(values, sequence_types):
diff --git a/src/wuttafarm/web/menus.py b/src/wuttafarm/web/menus.py
index 62d3d9c..71b9e5d 100644
--- a/src/wuttafarm/web/menus.py
+++ b/src/wuttafarm/web/menus.py
@@ -92,6 +92,11 @@ class WuttaFarmMenuHandler(base.MenuHandler):
                     "route": "animal_assets",
                     "perm": "animal_assets.list",
                 },
+                {
+                    "title": "Compost",
+                    "route": "compost_assets",
+                    "perm": "compost_assets.list",
+                },
                 {
                     "title": "Equipment",
                     "route": "equipment_assets",
@@ -259,6 +264,11 @@ class WuttaFarmMenuHandler(base.MenuHandler):
                     "route": "farmos_animal_assets",
                     "perm": "farmos_animal_assets.list",
                 },
+                {
+                    "title": "Compost Assets",
+                    "route": "farmos_compost_assets",
+                    "perm": "farmos_compost_assets.list",
+                },
                 {
                     "title": "Equipment Assets",
                     "route": "farmos_equipment_assets",
@@ -403,6 +413,11 @@ class WuttaFarmMenuHandler(base.MenuHandler):
                     "route": "farmos_animal_assets",
                     "perm": "farmos_animal_assets.list",
                 },
+                {
+                    "title": "Compost",
+                    "route": "farmos_compost_assets",
+                    "perm": "farmos_compost_assets.list",
+                },
                 {
                     "title": "Equipment",
                     "route": "farmos_equipment_assets",
diff --git a/src/wuttafarm/web/views/__init__.py b/src/wuttafarm/web/views/__init__.py
index b663cf5..2069aa7 100644
--- a/src/wuttafarm/web/views/__init__.py
+++ b/src/wuttafarm/web/views/__init__.py
@@ -59,6 +59,7 @@ def includeme(config):
         config.include("wuttafarm.web.views.groups")
         config.include("wuttafarm.web.views.plants")
         config.include("wuttafarm.web.views.water")
+        config.include("wuttafarm.web.views.compost")
         config.include("wuttafarm.web.views.logs")
         config.include("wuttafarm.web.views.logs_activity")
         config.include("wuttafarm.web.views.logs_harvest")
diff --git a/src/wuttafarm/web/views/assets.py b/src/wuttafarm/web/views/assets.py
index 1ada778..d9516a5 100644
--- a/src/wuttafarm/web/views/assets.py
+++ b/src/wuttafarm/web/views/assets.py
@@ -71,6 +71,18 @@ class AssetMasterView(WuttaFarmMasterView):
         "groups": "Group Membership",
     }
 
+    grid_columns = [
+        "thumbnail",
+        "drupal_id",
+        "asset_name",
+        "groups",
+        "asset_type",
+        "parents",
+        "owners",
+        "locations",
+        "archived",
+    ]
+
     sort_defaults = "asset_name"
 
     filter_defaults = {
@@ -103,6 +115,7 @@ class AssetMasterView(WuttaFarmMasterView):
 
     row_labels = {
         "message": "Log Name",
+        "locations": "Location",
     }
 
     row_grid_columns = [
@@ -112,7 +125,7 @@ class AssetMasterView(WuttaFarmMasterView):
         "message",
         "log_type",
         "assets",
-        "location",
+        "locations",
         "quantity",
         "is_group_assignment",
     ]
@@ -446,6 +459,9 @@ class AssetMasterView(WuttaFarmMasterView):
         # assets
         g.set_renderer("assets", self.render_assets_for_grid)
 
+        # locations
+        g.set_renderer("locations", self.render_assets_for_grid)
+
     def render_assets_for_grid(self, log, field, value):
         assets = getattr(log, field)
 
diff --git a/src/wuttafarm/web/views/compost.py b/src/wuttafarm/web/views/compost.py
new file mode 100644
index 0000000..c1634bb
--- /dev/null
+++ b/src/wuttafarm/web/views/compost.py
@@ -0,0 +1,62 @@
+# -*- coding: utf-8; -*-
+################################################################################
+#
+#  WuttaFarm --Web app to integrate with and extend farmOS
+#  Copyright © 2026 Lance Edgar
+#
+#  This file is part of WuttaFarm.
+#
+#  WuttaFarm is free software: you can redistribute it and/or modify it under
+#  the terms of the GNU General Public License as published by the Free Software
+#  Foundation, either version 3 of the License, or (at your option) any later
+#  version.
+#
+#  WuttaFarm is distributed in the hope that it will be useful, but WITHOUT ANY
+#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+#  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License along with
+#  WuttaFarm.  If not, see <http://www.gnu.org/licenses/>.
+#
+################################################################################
+"""
+Master view for Compost Assets
+"""
+
+from wuttafarm.db.model import CompostAsset
+from wuttafarm.web.views.assets import AssetMasterView
+
+
+class CompostAssetView(AssetMasterView):
+    """
+    Master view for Compost Assets
+    """
+
+    model_class = CompostAsset
+    route_prefix = "compost_assets"
+    url_prefix = "/assets/compost"
+
+    farmos_bundle = "compost"
+    farmos_refurl_path = "/assets/compost"
+
+    grid_columns = [
+        "thumbnail",
+        "drupal_id",
+        "asset_name",
+        "groups",
+        "parents",
+        "owners",
+        "locations",
+        "archived",
+    ]
+
+
+def defaults(config, **kwargs):
+    base = globals()
+
+    CompostAssetView = kwargs.get("CompostAssetView", base["CompostAssetView"])
+    CompostAssetView.defaults(config)
+
+
+def includeme(config):
+    defaults(config)
diff --git a/src/wuttafarm/web/views/farmos/__init__.py b/src/wuttafarm/web/views/farmos/__init__.py
index 708b553..6ea7181 100644
--- a/src/wuttafarm/web/views/farmos/__init__.py
+++ b/src/wuttafarm/web/views/farmos/__init__.py
@@ -42,6 +42,7 @@ def includeme(config):
     config.include("wuttafarm.web.views.farmos.groups")
     config.include("wuttafarm.web.views.farmos.plants")
     config.include("wuttafarm.web.views.farmos.water")
+    config.include("wuttafarm.web.views.farmos.compost")
     config.include("wuttafarm.web.views.farmos.log_types")
     config.include("wuttafarm.web.views.farmos.logs_activity")
     config.include("wuttafarm.web.views.farmos.logs_harvest")
diff --git a/src/wuttafarm/web/views/farmos/assets.py b/src/wuttafarm/web/views/farmos/assets.py
index 24dd145..517e8da 100644
--- a/src/wuttafarm/web/views/farmos/assets.py
+++ b/src/wuttafarm/web/views/farmos/assets.py
@@ -327,6 +327,12 @@ class AssetMasterView(FarmOSMasterView):
         # archived
         f.set_node("archived", colander.Boolean())
 
+        # drupal_id
+        if self.creating:
+            f.remove("drupal_id")
+        else:
+            f.set_readonly("drupal_id")
+
         # thumbnail_url
         if self.creating or self.editing:
             f.remove("thumbnail_url")
diff --git a/src/wuttafarm/web/views/farmos/compost.py b/src/wuttafarm/web/views/farmos/compost.py
new file mode 100644
index 0000000..50ef62c
--- /dev/null
+++ b/src/wuttafarm/web/views/farmos/compost.py
@@ -0,0 +1,79 @@
+# -*- coding: utf-8; -*-
+################################################################################
+#
+#  WuttaFarm --Web app to integrate with and extend farmOS
+#  Copyright © 2026 Lance Edgar
+#
+#  This file is part of WuttaFarm.
+#
+#  WuttaFarm is free software: you can redistribute it and/or modify it under
+#  the terms of the GNU General Public License as published by the Free Software
+#  Foundation, either version 3 of the License, or (at your option) any later
+#  version.
+#
+#  WuttaFarm is distributed in the hope that it will be useful, but WITHOUT ANY
+#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+#  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License along with
+#  WuttaFarm.  If not, see <http://www.gnu.org/licenses/>.
+#
+################################################################################
+"""
+Master view for farmOS Compost Assets
+"""
+
+from webhelpers2.html import tags
+
+from wuttafarm.web.views.farmos.assets import AssetMasterView
+
+
+class CompostAssetView(AssetMasterView):
+    """
+    Master view for farmOS Compost Assets
+    """
+
+    model_name = "farmos_compost_assets"
+    model_title = "farmOS Compost Asset"
+    model_title_plural = "farmOS Compost Assets"
+
+    route_prefix = "farmos_compost_assets"
+    url_prefix = "/farmOS/assets/compost"
+
+    farmos_asset_type = "compost"
+    farmos_refurl_path = "/assets/compost"
+
+    def get_xref_buttons(self, compost):
+        model = self.app.model
+        session = self.Session()
+
+        buttons = super().get_xref_buttons(compost)
+
+        if wf_compost := (
+            session.query(model.Asset)
+            .filter(model.Asset.farmos_uuid == compost["uuid"])
+            .first()
+        ):
+            buttons.append(
+                self.make_button(
+                    f"View {self.app.get_title()} record",
+                    primary=True,
+                    url=self.request.route_url(
+                        "compost_assets.view", uuid=wf_compost.uuid
+                    ),
+                    icon_left="eye",
+                )
+            )
+
+        return buttons
+
+
+def defaults(config, **kwargs):
+    base = globals()
+
+    CompostAssetView = kwargs.get("CompostAssetView", base["CompostAssetView"])
+    CompostAssetView.defaults(config)
+
+
+def includeme(config):
+    defaults(config)
diff --git a/src/wuttafarm/web/views/quantities.py b/src/wuttafarm/web/views/quantities.py
index 9a91941..05f624b 100644
--- a/src/wuttafarm/web/views/quantities.py
+++ b/src/wuttafarm/web/views/quantities.py
@@ -298,7 +298,8 @@ class QuantityMasterView(WuttaFarmMasterView):
             f.remove("measure")
         else:
             f.set_readonly("measure")
-            f.set_default("measure", quantity.measure.name)
+            if quantity.measure:
+                f.set_default("measure", quantity.measure.name)
 
         # value
         if self.creating: