The Manganese Content of Grasses and Alfalfa from Grazed Plots '

The nutritive value of manganese and its occurrence in animal and plant tissue has received considerable attention within the last few years. The literature relating to manganese in plant tissue has been reviewed by Lindow and Peterson (^)^, who reported analyses of 84 samples representing the principal classes of human foods. In a later paper by Skinner and Peterson {12), analyses of 54 feeding stuffs were given, which show a wide variation in the manganese content of plant material. Several other investigators (P, jpjp. 26-26) have contributed to the knowledge of the occurrence of manganese in foods and feeding stuffs. In this paper is shown the manganese content of orchard grass (Dactylis glomerata L.), domestic rye (Sécale céréale L.), tall oatgrass (Arrhenatherum elatius Beauv.), meadow fescue (Festuca elatior L.), timothy iPhleum pratense L.), Kentucky bluegrass (Poa pratensis L.), redtop (Agrostis palustris Huds.), bromegrass (Bromus inermis), and alfalfa (Medicago sativa L.). The samples used for analysis were collected from the experimental substation plots at Caldwejl, Idaho. Just before the plots were grazed, samples from each were taken and sent to the laboratory for analysis. The samples weie then dried, ashed, and analyzed as described in the following paragraphs.