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This journal provides immediate access to some articles. Volume 8(2); April 1933 Articles SAP HYDRAULICS PMCID: PMC439015 EFFECT OF SOIL TYPE AND AERATION UPON ROOT SYSTEMS OF CERTAIN AQUATIC PLANTS PMCID: PMC439016 INFLUENCE OF LEAF DESTRUCTION BY SULPHUR DIOXIDE AND BY CLIPPING ON YIELD OF ALFALFA PMCID: PMC439017 PHOTOSYNTHESIS IN VARIOUS PORTIONS OF THE SPECTRUM PMCID: PMC439018 EFFECT OF LIGHT ON THE BIOELECTRIC POTENTIALS OF ISOLATED ELODEA LEAVES PMCID: PMC439019 RELATION OF HYDROPHILIC COLLOIDS TO HARDINESS IN CABBAGE, BRUSSELS SPROUTS, AND ALFALFA PLANTS AS SHOWN BY THE DYE ADSORPTION TEST PMCID: PMC439020 STIMULATIVE EFFECTS OF X-RAYS ON PLANT GROWTH PMCID: PMC439021 DECREASING HARDINESS OF WINTER WHEAT IN RELATION TO PHOTOSYNTHESIS, DEFOLIATION, AND WINTER INJURY PMCID: PMC439022 FURTHER EVIDENCE THAT BORON IS ESSENTIAL FOR THE GROWTH OF LETTUCE PMCID: PMC439023 RAPID COLORIMETRIC DETERMINATION OF POTASSIUM IN PLANT TISSUES PMCID: PMC439024 A NEW METHOD AND INSTRUMENT FOR THE QUANTITATIVE DETERMINATION OF CHLOROPHYLL PMCID: PMC439025 GASOMETRIC METHOD OF ESTIMATING OXIDASE ACTIVITY PMCID: PMC439026 LEAF-WRINKLE, A NUTRITIONAL DISORDER OF SOY BEAN PMCID: PMC439027 Brief Papers: THE TROPOGRAPH AND ITS USE PMCID: PMC439028 RELATIVE INFLUENCE OF NITRATE AND AMMONIACAL NITROGEN UPON INTAKE OF CALCIUM BY TOBACCO PLANTS PMCID: PMC439029 Note NOTES PMCID: PMC439030 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||
