الفهرس 
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Abstract
Among the micronutrients essential for plant growth and development, boron, zinc and molybdenum are required in minute amounts. In this respect, a pot experiment was conducted to study the effect of 25 ppm boron, 50 ppm zinc and 25 ppm molybdenum and their interaction, on productivity of Phaseolus vulgaris var. Nebraska that planted in two types of soil; clay & sandy and under two concentrations of phosphorus fertilization (50% & 100%) from the recommended dose.
In the majority of cases, a general significant increase in the determined yield attributes ( number of pods/ plant, length of pod, fresh and dry weight of pods/plant, fresh and dry weight of plant, harvest index and relative grain yield) as well as in the biochemical aspects of the yielded seeds (some metals; Fe, K& P, carbohydrates contents and nitrogen contents), especially by the application of Mo treatment, under 50% phosphorus fertilization and by the treatment of Mo + Bo; under 100% phosphorus of the plant grown in both types of soil, but the effect was more pronounced, in plant grown in sandy soil.