Journal of the Royal Agricultural Society of England, Svazek 133

acreage acres agric Agricultural alfalfa alkali bee animal production aphid Bee Wld biological British bumble bees calcium cent Centre cereal chemical cocksfoot concentrations conservation cost crisps crop dairy cows demonstration digestibility early economic eelworm effect efficient English summary ewes factors farm farmers feeding fertiliser flowers forage glucose grass grassland grazing growers growing growth harvesting herbage herbicides honeybees husbandry hypocalcaemia hypomagnesaemia important improved increase industry insects Kent ketosis lactation lambs land liquid milk lucerne magnesium metabolic methods nectar nutritional organisation output parasites parturient hypocalcaemia pastures perennial ryegrass pest phosphorus Plant Breeding pollination potatoes problems processing production disease programmes protein red clover rotation Royal Show ruminant seed production sheep silage soil species sugar beet sugar content sward techniques tillers tons trees types units utilisation varieties wheat whitefly winter yield