Summary On a newly sown pasture suitably treated with superphosphate four replications of applications of ground limestone at 0, 1, 5, 10, 20, and 40 cwt were set out; across these limed strips sodium molybdate at 0, 1, 2 and 4 oz per acre was applied, giving 24 treatments per replication. At low rates of liming, sodium molybdate increased clover growth more than at high rates; there was no advantage in applying more than 2 oz sodium molybdate per acre. Increasing the rate of application of limestone improved the growth of the pasture even in absence of molybdate. Three years after laying down, all plots carried the same amount of fodder in the spring. Implic3.tions of this result are discussed. Nitrogen, phosphorus, and calcium contents of white‐clover leaflets varied relatively little with treatment. Manganese content was reduced by liming, but was little altered by variation in rate of application of molybdate. Manganese decreased as molybdenum content increased. A logarithmic relationship between manganese content and rate of use of limestone was found. Molybdenum content was increased by successively larger applications of ground limestone in the absence of molybdate treatment, and by use of sodium molybdate. Logarithmic relationships between molybdenum content of white‐clover leaflets and rate of application of sodium molybdate and also rate of use of limestone were found. pH value and exchangeable calcium of the soil were increased by use of limestone, but citric‐soluble phosphorus and potassium and exchangeable potassium and magnesium were reduced by such treatment. These results are important in relation to interpretation of analytical data in advisory work.
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Askew et al. (1958) studied this question.