"Pflanzenphysiologie." . . "Landwirtschaft." . . . . . . . . . . . . . "Boron and its role in crop production" . "Chemistry and mineralogy of boron in soils; Sources of boron; Physiology and biochemistry of boron in plants; Factors affecting boron uptake by plants; Soil testing for boron acid soils; Soil testing for boron on alkaline soils; Deficiency sufficiency and toxicity levels of boron in crops; Deficiency and toxicity symptoms of boron in plants; Technology and application of boron fertilizers for crops; Responses to boron on field and horticultural crop yields; Role of boron in seed production; Boron toxicity and irrigation management." . . . . . . . . . "CRC boron and its role in crop production" . . "Nutzpflanzen." . . "Pflanzenernährung." . . "Sols Teneur en bore." . . "Bor." . . "Agriculture Effets du bore." . . "Aufsatzsammlung." . . "Cultures, Effets du bore sur les." . . . .