A Study of Techniques for Predicting Potassium and Boron Requirements for Alfalfa: II. Influence of Borax on Deficiency Symptoms and the Boron Content of the Plant and Soil

Evaluation of the Micronutrient Fertility of Nigeria’s Semi-Arid Savannah Soils: Boron and Molybdenum

“…For medium-textured soils, 0.35-0.50 ppm have been suggested (DETURK and OLSEN, 1941;DAWSON and GUSTAFSON, 1945). The soil B levels obtained in this study all fell within these limits.…”

The effect of boron fertilization on spring cereals

“…In the case of plants with a higher boron requirement, it has generally been possible to determine satisfactorily the boron requirement with water-soluble boron, although exceptions have occurred even in experiments with sugar beet (Hamence and Oram 1964). The significance of threshold values of water-soluble boron for different plants is influenced, however, by many factors, such as soil texture (Rogers 1947, Wear andPatterson 1962), the range of plant-available water (Dawson and Gustafson 1945, Lehr and Henkens 1959, Johansson and Nilsson 1973 and rate of fertilization (Nelyubova et al 1971, Johansson andNilsson 1973). In the present material, the effect of boron on the yield is more closely correlated with calcium content in soil than with its pH.…”

Seasonal Variation in the Boron Content of Alfalfa1

“…An adequate supply of boron was assumed if the boron content of the total shoot exceeded 20 ppm. (5,7,16). In plants where the boron content of the total shoot is less than 20 ppm.…”