| Show layers require calcium to keep up production the south dakota agricultural experiment station reports the results of five years experimental exper mental work in comparing several sources of calcium for laying hens part of their conclusions from this work are as follows over a five year experimental period no significant difference was found in favor of any of the supplements ts used namely oyster shell clam shell black hills limestone limestone when results were judged by egg production egg weight and egg breaking strength A lack of calcium fed as a supplement to the ordinary complete ration either eitnier all mash or mash and grain markedly de decreases creages egg production and causes a loss of egg s shell hell strength added calcium is absolutely necessary for maximum maximum egg production added calcareous materials can stimulate the calcium secreting part of the oviduct in 24 hours after feeding when such materials had been previously denied the hens |
