INDEX 



Absorptiometer, 26-7 

 Absorptiometry determination of alu- 

 minium, 49 



of cobalt, 51 



of copper, 42-4 



of manganese, 35—7 



of molybdenum, 48 



of zinc, 40—1 

 Absorption of manganese retarded by 

 calcium, 108-9 



of selenium by plants, 129-31 

 Agaricus campestris, see Mushroom 

 Agulhon, H., 3 

 Alben, A. O., 72 

 Aleurites fordii, see Tung 

 Alewites montana, see Mu-oil tree 

 Alexander, T. R., 81-2 

 Alfalfa, deficiency of boron in, 87—8 

 Algae, trace elements necessary for, 8 

 Alkali disease, 127-31 

 Almond, zinc deficiency in, 74 

 Aluminium, determination of, in plant 

 material, 48-9 



species requiring, 18 



as micro-nutrient, 3, 4 



in animals, 124-6 

 Anderssen, F. G., 6, 53, 55-6, 92-4 

 Andropogon scoparius, selenium con- 

 tent of, 129 

 Andropogon sorghum, zinc necessary 



for, 71 

 Anions, effect of boron on absorption 



of, 114-15 

 Antagonism between manganese and 



calcium, 107—9 

 Apical buds, effect of zinc deficiency 



on, 70-1 

 Apple, boron deficiency in, 81, 88-9 



copper deficiency in, 90, 92-4 



intervenal injection of, 54 



leaf stalk injection of, 55 



zinc deficiency in, 74 



leaves, copper content of, 94 

 Apricot, boron deficiency in, 89 



copper deficiency in, 92 



zinc deficiency in, 69, 70-1, 74-5 

 Arachnida, copper in, 136 

 Arc spectra, 29-30 

 Ark, P. A., 75-6, 153 



Arnon, D. I., 1, 6, 9, 10, 11, 24-5, 96, 

 101 



Ascidians, vanadium in blood of, 125 



Ash, preparation of, 32 



Askew, H. O., 51, 89, 138, 146 



Asparagus, effect of trace elements on 

 growth of, 9 



Aspergillus flavus, micro-nutrients for, 8 



Aspergillus niger, micro-nutrients for, 

 6-8 

 trace elements and conidia forma- 

 tion in, 103 



Aston, B. C, 138 



Astragalus spp., selenium content of, 

 129-30 



Atack, F. W., 49 



Ataxia, enzootic, 139-42 



Atomic structure and biological essen- 

 tiality, 97-100 



Auxin, relation of zinc to, 111-12 



Avena saliva, see Oat 



Bacteria associated with little leaf and 



white bud, 75-6 

 Bailey, D. E., 128 

 Barium in animals, 125 

 Barley, boron necessary for, 3 

 copper deficiency in, 94 

 copper necessary for, 6 

 manganese deficiency in, 61 

 silicon necessary for, 5 

 zinc necessary for, 3 

 Barnette, R. M., 3, 77, 79-80 

 Bayliss, N. S., 78-9 

 Bean, broad, boron necessary for, 3 

 broad, effect of boron deficiency on, 

 81 

 effect of boron on absorption of 

 calcium by, 114—17 

 zinc necessary for, 3 

 soya, calcium- boron balance in, 116- 

 17, 121 

 effect of boron on absorption of 



calcium by, 116-17 

 effect of iron-manganese ratio on 

 growth of, 104—7 

 wax, zinc necessary for, 71 

 Beck, A. J., 103 

 Becker, R. B., 138 



