The increase in the availability of phosphates in soils high in calcium is a good example of this effect. Since green manure ... NOTE: Seeds treated with dusts containing copper or mercury compounds are not suitable for inoculation because of toxicity ... The prime conditions are the drainage, aeration, moisture, pH, active calcium, and the amount of readily available N in the ... Alfalfa and sweet clover, for example, have high calcium, potassium, and phosphorus requirements, and most legumes have higher ...