Yazar: Bradley D. Volkerts

Yttrium is a silvery-metallic transition metal chemically similar to the lanthanoids and has historically been classified as a rare earth element. The most important use of yttrium is in making phosp …

In Chapter One, Gerhard Gramss and Klaus-Dieter Voigt study the theory that production of high-productivity grain crops and their locally acclimatised land strains must be stretched to low-value crop …