Soils and soil fertility.
Soil fertility.
Soils and fertilizers : abstracts of world literature.
Irrigation /
Biotechnologies at soil fertility inorease : Proceedings Bratislava, 21.-24.9.1987.
Irrigation Technology.
Fertilizers and fertilization : introduction and practical guide to crop fertilization /
Planning for irrigation system /
Irrigation principles and practices.
Fertilizer abstracts.
Fish productiuon in irrigation canals. : A review. /
Mammalian fertilization : an atlas of ultrastructure /
Catalogue of fertilizers and their use /
Ethnography of Fertility and Birth.
Regulation of human fertility. : Proceedings of a Symposium on Advances in fertility regulation ... /
Human fertilization : symposium Essen, July 1976 /
Managing irrigation with gypsus blocks : a step-by-step guide for farmers /
Human fertility control : theory and practice /
The response of wheat to fertilizers : Mikko Silanpää.
L´irrigation en grande culture : préparation et réalisation d´un projet d´irrigation à la ferme : texte imprimé /
Fertilization of dryland and irrigated soils /