This journal provides immediate access to some articles. Volume 28(2); April 1953 Articles Effect of Quality and Intensity of Solar Radiation on Injury of Lemon Fruit by Sulphur Treatment in the Field PMCID: PMC540371 Studies on the Chemistry of the Living Bark of the Black Locust Tree in Relation to Frost Hardiness. IV. Effects of Ringing on Translocation, Protein Synthesis and the Development of Hardiness PMCID: PMC540372 Floral Induction and Development in Ochard Grass PMCID: PMC540373 On the Mechanism of Action of Growth Regulators PMCID: PMC540374 Pyridine Nucleotide-Nitrate Reductase from Extracts of Higher Plants PMCID: PMC540375 Carbohydrate Metabolism in the Tomato Fruit as Affected by Pollination, Fertilization and Application of Growth Regulators PMCID: PMC540376 Factors Affecting Cotyledonal Cracking during the Germination of Beans (Phaseolus Vulgaris) PMCID: PMC540377 Accumulation and Distribution of Molybdenum in the Cotton Plant PMCID: PMC540378 The Use of C14 in Locating Growth Regions in the Cell Walls of Elongating Cotton Fibers PMCID: PMC540379 Phosphorylase and a Branching Enzyme in Squash PMCID: PMC540380 The Effects of Maleic Hydrazide on Flower Initiation PMCID: PMC540381 Preferential Assimilation of Ammonium Ion by Chlorella vulgaris PMCID: PMC540382 Reserve Carbohydrates in Orchard Grass Cut for Hay PMCID: PMC540383 Brief Papers: The Intracellular Distribution of Ascorbic Acid in Turnip Leaves PMCID: PMC540384 Absence of Acid Phosphatase from Chloroplasts of Spinach and Iris PMCID: PMC540385 Symptoms of Molybdenum Deficiency in Tobacco PMCID: PMC540386 The Use of Seeds with Low Content of Trace Elements in Studies on Essentially of Micro-nutrients PMCID: PMC540387 Partial Separation of the Plastid Pigments by Paper Chromatography PMCID: PMC540388 The Distribution of C14 in the Root and Shoot Apices of Young Corn Plants PMCID: PMC540389 Water-cooled Lamp Systems with Refluxing Aqueous Filters PMCID: PMC540390 Note Notes PMCID: PMC540391 Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||