Lime effects on hill country

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Abstract
Limestone at 3 t/ha, and monocalcium dihydrogen phosphate at 150 kg/ha elemental phosphorus (P) were applied in factorial combination in 21 blocks to hill soils derived partly from sedimentary rocks and partly from volcanic ash showers. Slopes ranged from 13 to 37°, pH in the 0–76 mm profile from 4.6 to 5.4, and Olsen phosphate values from 4 to 38 J.tg/g. A rapid increase in soil moisture (SM) on limed plots was followed by a negative lime × P interaction on SM in the top 76 mm. Possible causes for these effects are discussed.