diff --git a/app/controllers/measurements_controller.rb b/app/controllers/measurements_controller.rb
index 82facaf..6996eea 100644
--- a/app/controllers/measurements_controller.rb
+++ b/app/controllers/measurements_controller.rb
@@ -49,6 +49,7 @@ class MeasurementsController < ApplicationController
       [
         :id,
         :quantity_id,
+        :value,
         :unit_id,
         :_destroy
       ]
diff --git a/app/models/measurement.rb b/app/models/measurement.rb
index 9c37012..cfc33a1 100644
--- a/app/models/measurement.rb
+++ b/app/models/measurement.rb
@@ -5,7 +5,7 @@ class Measurement < ActiveRecord::Base
   has_many :readouts, inverse_of: :measurement, dependent: :destroy, validate: true
   validates :readouts, presence: true
   accepts_nested_attributes_for :readouts, allow_destroy: true, reject_if: proc { |attrs|
-    attrs['quantity_id'].blank?
+    attrs['quantity_id'].blank? && attrs['value'].blank?
   }
   # Readout (quantity_id, unit_id) pair uniqueness check for nested attributes
   validate do
@@ -15,7 +15,7 @@ class Measurement < ActiveRecord::Base
     end
   end
 
-  validates :name, presence: true, uniqueness: {scope: :project_id}
+  validates :name, presence: true
 
   after_initialize do
     if new_record?
diff --git a/app/models/nutrient.rb b/app/models/nutrient.rb
index 1abc0b1..ebbd1e6 100644
--- a/app/models/nutrient.rb
+++ b/app/models/nutrient.rb
@@ -4,7 +4,7 @@ class Nutrient < ActiveRecord::Base
   belongs_to :unit, required: true
 
   validates :quantity, uniqueness: {scope: :ingredient_id}
-  validates :amount, numericality: {greater_thani_or_equal_to: 0.0}
+  validates :amount, numericality: {greater_than_or_equal_to: 0.0}
 
   after_initialize do
     if new_record?
diff --git a/app/models/readout.rb b/app/models/readout.rb
index 506ba5e..96d67da 100644
--- a/app/models/readout.rb
+++ b/app/models/readout.rb
@@ -4,4 +4,5 @@ class Readout < ActiveRecord::Base
   belongs_to :unit, required: true
 
   validates :quantity, uniqueness: {scope: [:measurement_id, :unit_id]}
+  validates :value, numericality: true
 end
diff --git a/app/views/ingredients/_form.html.erb b/app/views/ingredients/_form.html.erb
index 1863df9..8ebdfec 100644
--- a/app/views/ingredients/_form.html.erb
+++ b/app/views/ingredients/_form.html.erb
@@ -67,7 +67,7 @@
   function deleteNutrient() {
     var row = $(event.target).closest('p.nutrient');
     row.find('[id$=_destroy]').val(1);
-    // FIXME: should only hide()  row if record already saved (to send _destroy to backend)
+    // FIXME: should only hide() row if record already saved (to send _destroy to backend)
     row.remove();
     $('p.nutrient:visible:first label:first').text('<%= t "field_nutrients" %>');
     if ($('p.nutrient:visible').length <= 1) {
diff --git a/app/views/measurements/_form.html.erb b/app/views/measurements/_form.html.erb
index 81b6fc2..47d6bfa 100644
--- a/app/views/measurements/_form.html.erb
+++ b/app/views/measurements/_form.html.erb
@@ -1,46 +1,35 @@
-<div id="add-measurement" <%= 'style=display:none;' if @measurement.errors.empty? %>>
-  <h2><%= t ".heading_new_measurement" %></h2>
+<%= error_messages_for @measurement %>
 
-  <%= labelled_form_for @measurement,
-    url: project_measurements_path(@project),
-    html: {id: 'measurement-add-form', name: 'measurement-add-form'} do |f| %>
-
-    <%= error_messages_for @measurement %>
-
-    <div class="box tabular">
-      <p><%= f.text_field :name, size: 40, required: true %></p>
-      <p><%= f.select :source_id, source_options, required: false, include_blank: true %></p>
-      <% @measurement.readouts.each_with_index do |r, index| %>
-        <%= f.fields_for 'readouts_attributes', r, index: '' do |ff| %>
-          <p class="readout">
-            <%= ff.select :quantity_id, quantity_options,
-              {include_blank: true, label: (index > 0 ? '' : :field_readouts)} %>
-            <%= ff.select :unit_id, unit_options, {label: ''} %>
-            <%= ff.check_box :_destroy, {style: "display:none", label: ''} %>
-            <%= link_to t(".button_delete_readout"), '#',
-              class: 'icon icon-del',
-              style: (@measurement.readouts.length > 1 ? "" : "display:none"),
-              onclick: "deleteReadout(); return false;" %>
-          </p>
-        <% end %>
-      <% end %>
-      <p>
-        <%= link_to t(".button_add_readout"), '#', class: 'icon icon-add',
-          onclick: 'addReadout(); return false;' %>
+<div class="box tabular">
+  <p><%= f.select :source_id, source_options,
+    {required: false, include_blank: t('.null_source')} %></p>
+  <p><%= f.text_field :name, size: 40, required: true %></p>
+  <% @measurement.readouts.each_with_index do |r, index| %>
+    <%= f.fields_for 'readouts_attributes', r, index: '' do |ff| %>
+      <p class="readout">
+        <%= ff.select :quantity_id, quantity_options,
+          {include_blank: true, label: (index > 0 ? '' : :field_readouts)} %>
+        <%= ff.number_field :value, {size: 8, step: :any, label: ''} %>
+        <%= ff.select :unit_id, unit_options, {label: ''} %>
+        <%= ff.check_box :_destroy, {style: "display:none", label: ''} %>
+        <%= link_to t(".button_delete_readout"), '#',
+          class: 'icon icon-del',
+          style: (@measurement.readouts.length > 1 ? "" : "display:none"),
+          onclick: "deleteReadout(); return false;" %>
       </p>
-    </div>
-    <%= submit_tag l(:button_create) %>
-    <%= link_to l(:button_cancel), "#",
-      onclick: '$("#add-measurement").hide(); return false;' %>
+    <% end %>
   <% end %>
-  <hr>
+  <p>
+    <%= link_to t(".button_add_readout"), '#', class: 'icon icon-add',
+      onclick: 'addReadout(); return false;' %>
+  </p>
 </div>
 
 <%= javascript_tag do %>
   function addReadout() {
     var row = $('p.readout:visible:last');
     var new_row = row.clone().insertAfter(row);
-    new_row.find('select[id$=_quantity_id]').val('');
+    new_row.find('input[id$=_value], select[id$=_quantity_id]').val('');
     new_row.find('select[id$=_unit_id]').val(row.find('select[id$=_unit_id]').val());
     new_row.find('label:first').text('');
     if ($('p.readout:visible').length > 1) {
diff --git a/app/views/measurements/index.html.erb b/app/views/measurements/index.html.erb
index f44596e..141275b 100644
--- a/app/views/measurements/index.html.erb
+++ b/app/views/measurements/index.html.erb
@@ -9,9 +9,27 @@
   <% end %>
 </div>
 
-<%= render partial: 'measurements/form' %>
+<div id="add-measurement" <%= 'style=display:none;' if @measurement.errors.empty? %>>
+  <h2><%= t ".heading_new_measurement" %></h2>
+
+  <%= labelled_form_for @measurement,
+    url: project_measurements_path(@project),
+    html: {id: 'measurement-add-form', name: 'measurement-add-form'} do |f| %>
+
+    <%= render partial: 'measurements/form', locals: {f: f} %>
+
+    <div class="tabular">
+      <p>
+        <%= submit_tag l(:button_create) %>
+        <%= link_to l(:button_cancel), "#",
+          onclick: '$("#add-measurement").hide(); return false;' %>
+      </p>
+    </div>
+  <% end %>
+  <hr>
+</div>
 
 <h2><%= t ".heading" %></h2>
 <div id='measurements'>
-  <%= render partial: 'measurements/list' %>
+  <%= render partial: 'measurements/index' %>
 </div>
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 90fa891..efa74c1 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -60,6 +60,7 @@ en:
       heading_new_measurement: 'New measurement'
       button_add_readout: 'Add readout'
       button_delete_readout: 'Delete'
+      null_source: '- unspecified -'
     index:
       heading: 'Measurements'
       link_new_measurement: 'New measurement'