means thos (4 resultados)

Wraps. Condición: Very good. Stapled wraps. 39 pages. Illustrated with photographs and diagrams. Gray paper covers with title on the front. Light wear to the contents. A few small tears to the spine. Interior contents clean.

Paperback. Condición: New. Print on Demand. This book introduces a novel electrical method for determining the soluble salt content of the soilâ"the amount of dissolved minerals in soil moisture. The method, devised by the author, measures the electrical conductivity of a soil sample to indicate variations in soluble salt content within undisturbed soil. The author provides a detailed description of the method, including formulas for calculating salt content in terms of sodium chloride equivalents. The book investigates the influence of water and salt content on the electrical resistance of soils, revealing the impact of soil texture on resistance. Ultimately, this work contributes valuable insights into the relationship between soil properties and crop production, offering a deeper understanding of soil dynamics and the factors influencing soil fertility and plant growth. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.

Hardcover. Condición: Near Very Good. Estado de la sobrecubierta: No Dustjacket. MAP VOLUME ONLY. 11 folded maps in boards with pocket, some maps have slight creases to corners or a touch of edgewear, otherwise all are bright, clean solid VG copies, housed in Near VG stiff boards with pocket on recto, which has slight bumps to spine ends and corners, short tear to top of front hinge, slight bowing to boards, light rubbing, slight edgewear, slight sunning to spine with very faint offsets to boards, and light sunning and wear to pocket seams.

Paperback. Condición: New. Print on Demand. This book probes the origins and impact of alkali salts in arid region soils. The author, a leading soil chemist, explores the complex chemical reactions that occur when water interacts with these salts, leading to the formation of alkali. Through detailed investigation and analysis of soil samples, the book uncovers the factors that contribute to alkali accumulation and its detrimental effects on plant growth. The author also delves into the classification of alkali soils, identifying distinct types based on their chemical composition and geographical distribution. This insightful examination provides a comprehensive understanding of alkali soils, their impact on agriculture, and strategies for managing and reclaiming affected lands. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.