H d hooker jr (5 risultati)

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

HRD. Condizione: New. New Book. Shipped from UK. Established seller since 2000.

Paperback. Condizione: New. Print on Demand. This book offers a detailed analysis of the seasonal variations in the chemical composition of apple spurs and their physiological condition, focusing on the distinction between bearing, non-bearing, and barren spurs. Over the course of a year, the author meticulously determined the presence of various essential chemical elements in the spurs' composition to discern patterns corresponding to different physiological states. The author found that during late summer and fall, bearing spurs, which actively grow leaves, flowers, or fruit, display a steady increase in phosphorus and nitrogen content. These elements are essential for fruit-bud differentiation and serve to explain why non-bearing and barren spurs lack this crucial increase. These findings offer valuable insights into the chemical processes underlying fruit-bud differentiation and the factors that contribute to productivity and sterility in apple trees. 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.…