comply with closed periods and post closed period limits for spreading organic manures with high readily available nitrogen (includes slurry and poultry manure)
cydymffurfio â therfynau ar ôl y cyfnod gwaharddedig ar gyfer gwasgaru tail organig sydd â chyfran uchel o nitrogen ar gael yn rhwydd (gan gynnwys slyri a thail ieir)