Investigations into the Intensive System of Grassland Management. By the Agricultural Research Staff of Imperial Chemical Industries, Limited. III. The Seasonal Variation in the Mineral Content of Pasture with Particular Reference to Drought.

Seventeen samples of pasture collected from May to December, 1929, have been analysed for mineral constituents. 1. The results show that drought conditions seriously affect the mineral composition of pastures. 2. The calcium content showed a slight fall during the months of drought, and a more marked fall in the months of heavy rain from October to December. 3. The phosphorus content fell during the drought period and rose rapidly at the end of the year.