gustafsen (1 Ergebnisse)

Hardcover. Zustand: As New. Contents 1. Requirements for plant growth. 2. Nitrogenous fertilizer materials. 3. Phosphatic fertilizer materials. 4. Potash fertilizer materials. 5. Effects of fertilizers on crops and soils. 6. Factory mixed fertilizers. 7. Home mixing of fertilizers. 8. Purchase and use of fertilizers. 9. Liming in relation to fertilizer practice. 10. Organic matter in relation to fertilizer practice and use. Index. From the Preface This little book is an attempt to supply accurate up to date information as to the source and make up of commercial fertilizers. Special stress is laid on the effects of fertilizers on soils and crops in the hope of aiding the user in making a wise choice for his individual soil and cropping conditions. A fertilizer should satisfy the requirements of the particular crop to be grown. Farmers are urged to consider the interrelationship between crops and the effects of the residues from fertilizers used for one crop on those which follow. 172 pp.