I think "pulses" here is being used to refer to the legume family of plants grown for their edible seeds. So I think the question is about silicon or silicon compounds being used as nutrients when growing soya beans, lentils, etc. This is outside my area of expertise; I assume it showed up as a suggested question for me because of the mention of silicon. I would recommend adding some other keywords like 'agriculture' to the question so that experts in relevant fields will see it, as opposed to people knowledgeable about semiconductor materials.