Agricultural Textbook

acid acre action Agricultural albuminoids ammonia amount animal applied barley beans bones calcareous calcium calcium phosphate Calcium sulphate carbon carbon dioxide cattle cent chalk character clay land clay soil climate clover colour composition condition considerable constituents contain coprolites cultivation Deanstone depth drainage drains dung effect employed evaporation farm farmer farmyard manure fattening favour feet fertilisers fertility field grass growing growth guano heat humus important inches ingredients insoluble Intermediate iron lambs lime loams loamy Magnesia manure marl mineral matter moisture nitrate of soda nitrogen oats organic matter oxide particles pasture phosphate phosphorus pentoxide plant food plough poor potash proportion quantity race rain rainfall rendered rich rock root crops rotation salts sand sandy seeds sheep silica soluble sown stiff straw subsoil substances sulphate superphosphate supersaturation surface swedes temperature tillage tion turnips vegetable matter vetches Voelcker wheat winter yards