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Soil samples were taken at 0-1 in. (0-2 54 cm) and 1-3 in. (2-54-7-62 cm) depths on five occasions over a period of 55 days from under (3 in. (762 cm) radius from centre) and around (9 in. (22-86 cm), 12 in. (30 48cm) and 18 in. (45 72 cm) radius from centre) dung patches deposited on pasture. The samples were analysed for available N, K and P. There was a significant increase in the level of all three elements in the 0-1 in. samples beneath the dung patch. The increase persisted throughout the experiment. K exhihited the greatest increase, hut was not detected beyond the edge of the dung patch. The increase in soil N was smaller hut was detected up to 6 in. (15-24 cm) from the edge of the dung patch. P al^o increased, but was more variable than either N or K. Soil N, P and K did not increase in the 1-3 in. samples.The weight and fibre content of the dung patch was also measured throughout the experiment. After high initial losses (25%) the dung patch decayed only slowly.The loss of ammonia from dung patches was followed over 13 days in a separate experiment During the relatively hot weather over this period approximately 5 % of the N iu the dung was lost as ammonia, maiidy in the first five days. During the experimental period of 13 days 60% of the original weight of the dung patch was lost through evaporation.The results are discussed in relation to the growth of herbage surrounding a dung patch reported in the previous paper (12).

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1. An experiment was conducted in which lambs grazed on pastures of cocksfoot, ryegrass and tall fescue grown with and without white clover, as well as on pastures of pure white clover.