The effects of lime-pelleting and lime-superphosphate fertilizer on the growth of three annual legumes in an acid sandy soil
Cordero, S.; Blair, G.J.
Plant and Soil 50(2): 257-268
3 pioneer pasture legume spp., Trifolium subterraneum, T. glomeratum and Ornithopus compressus, were grown at Armidale, New South Wales in a sandy soil of pH 5.0. The growth and nodulation of each sp. was examined in the presence and absence of lime pelleting and with superphosphate and lime-superphosphate fertilizer. In each sp. tested, plant yield, nodule number and N recovery was max. where lime pelleting and lime-superphosphate were applied together. Plant Ca content indicated that the response to lime was due to changes in soil pH rather than to a Ca response. T. glomeratum was the sp. most responsive to lime application but its growth was at best only 50% of that of T. subterraneum and O. compressus, which produced equally under both favourable (pH 5.9) and unfavourable (pH 4.4) conditions created by fertilizer applications.