CHAPTER XXIV.
The Recognition of Soil Character from the Native Vegetation; Mississippi, [487].—Climatic and Soil Conditions, [487].—Natural Vegetation the Basis of Land Values in the United States, [488].—Investigation of Causes Governing Distribution of Native Vegetation, [488].—Investigations in Mississippi, [489].—Vegetative Belts in Northern Mississippi, [490].—Sketch Map of Same, with Tabulation of Lime Content and Native Vegetation, [490].—Lime Apparently a Governing Factor, [492].—Soil Belts in Southern Mississippi, [493].—Vegetative and Soil Features of Coast Belts. Diagram, [495].—Table of Plant-Food percentages and Native Growth, [496].—Definition of Calcareous Soils, [496].—Differences in the Form and Development of Trees, [498].—Forms of the Post Oak. Figures, [498].—Forms of the Black Jack Oak. Figures, [500].—Characteristic Forms of other Oaks, [502].—Sturdy Growth on Calcareous Lands, [502].—Growth of Cotton, [503].—Lime Favors Fruiting, and compact Growth, [504].—Physical vs. Chemical Causes of Vegetative Features, [505].—Lowland Tree Growth, [506].—Contrast between “First” and “Second” Bottoms, [506].—Tree Growth of the First Bottoms. The Cypress, [507].—Figures of Swamp and Upland Cypress, [508].—Other Lowland Trees, [509].—General Forecasts of Soil Quality in Forest Lands, [509].
CHAPTER XXV.
Recognition of the Character of Soils from their Native Vegetation. United States at Large, Europe, [511].—Forest Growths outside of Mississippi; Alabama, Louisiana, Western Tennessee, and Western Kentucky, [511].—North Central States East of the Mississippi River, [513].—Upland and Lowland Vegetation in the Arid and Humid Region, [515].—Forms of Deciduous Trees in the Arid Region, [516].—Tall Growth of Conifers, [517].—Herbaceous Plants as Soil Indicators, [517].—Leguminous Plants Usually Indicate Rich or Calcareous Lands, [518].—European Observations and Views on Plant Distribution and its Controlling Causes, [519].—Composition of Pine Ashes on Calcareous and Non-calcareous Lands. Table, [520].—Calciphile, Calcifuge, and Indifferent Plants, [521].—Silicophile vs. Calciphile Flora, [523].—What is a Calcareous Soil? [524].—Predominance of Calcareous Formations in Europe, [525].
CHAPTER XXVI.
The Vegetation of Saline and Alkali Lands, [527].—Marine Saline Lands, [527].—General Character of Saline Vegetation, [527].—Structural and Functional Differences Caused by Saline Solutions, [528].—Absorption of the Salts. Table, [529].—Injury from the Various Salts, [531].—Reclamation of Marine Saline Lands for Culture, [533].—The Vegetation of Alkali Lands, [534].—Reclaimable and Irreclaimable Alkali Lands as Distinguished by their Natural Vegetation, [534].—Plants Indicating Irreclaimable Lands, [535].—Tussock Grass; Bushy Samphire; Dwarf Samphire; Saltwort; Greasewood; Alkali Heath; Cressa; Salt Grass, [536].—Relative Tolerances of the different Species; Table, [549].
APPENDICES.
A.—Directions for taking Soil Samples, issued by the California Experiment Station, [553].
B.—Summary Directions for Soil-Examination in the Field or Farm, [556].
C.—Short Approximate Methods of Chemical Soil-Examination Used at the California Experiment Station, [560].