farm/views/production.xml

<?xml version="1.0" encoding="UTF-8"?>
    <openerp>
        <data>
            <record id="mrp_boom_form_farm_view" model="ir.ui.view">
            <field name="name">mrp.oom.farm.form</field>
            <field name="model">mrp.bom</field>
            <field name="inherit_id" ref="mrp.mrp_bom_form_view"/>
            <field name="arch" type="xml">
                <field name="active" position="after">
                        <field name="semen_dose"/>
                        <field name="specie"/>
                </field>
            </field>
            </record>
        </data>
    </openerp>