Responses by Siratro (Phaseolus atropurpureus) and white clover (Trifolium repens) to nutrients on solodic soils at Beaudesert, Queensland

Truong, Vu; Andrew, CS; Skerman, P. J.

doi:10.1071/ea9670232

Cited by 7 publications

(1 citation statement)

References 5 publications

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“…Several other Australian reports have shown little or no tropical legume response to liming of low Ca acid soils (1, 13) or of low Ca solodic soils (21,26). In a pot study, de Carvalho et al (8)…”

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confidence: 96%

Field Response of Four Tropical Legumes to Lime and Superphosphate¹

Snyder¹,

Kretschmer²,

Sartain³

1978

Agronomy Journal

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The generalization is often made that tropical legumes show little or no response to lime, even in acid soils low in Ca. Phosphorus responses, however, are generally observed. The effect of lime in an acid, virgin spodosol (Oldsmar fs) in southern Florida plots was investigated. Significant yield responses to lime and P were observed. Maximum total annual dry matter production of centro (Centrosema pubescens Benth.), desmodium (Desmodium heterocarpon DC.), stylo (Stylosanthes guyanensis Swartz), and ‘Siratro’ (Macroptilium atropurpureum Urb.) required lime applications of about 2,200 kg/ha. Regression analyses suggested that centro and Siratro might respond to higher lime rates if combined with P rates higher than those used in the study. Calculated optimum P rates ranged from 45 to 78 kg/ha, with desmodium requiring the least. Liming beyond the optimum rate appeared to seriously reduce production of desmodium and stylo.

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mentioning

confidence: 96%

Field Response of Four Tropical Legumes to Lime and Superphosphate¹

Snyder¹,

Kretschmer²,

Sartain³

1978

Agronomy Journal

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Manganese toxicity in pasture legumes

Trưởng

Wilson

Andrew³

1971

Plant Soil

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in the substrate on Mn toxicity in several pasture legumes were studied.In solution culture, high Ca supply alleviated Mn toxicity by reducing the proportion of absorbed Mn moving to the shoots, whereas high P application intensified the toxicity by increasing uptake. In addition, there was an indication of a Mn x P interaction in the plant which could influence dry matter yield of some tropical legumes.In the soil, Mn toxicity was influenced by both availability and plant processes. Toxicity could be prevented by small applications of CaCO3, effective largely by reducing the exchangeable Mn level. High Ca(H~PO4)~ supply aggravated toxicity by increasing the exchangeable Mn fraction of the soil. The influences of both CaCO3 and P on exchangeable manganese fraction were attributed to their effects on the pH of small soil pockets, without influencing general soil pH. In addition to its local effect on soil pH, high P supply could directly increase this fraction of soil Mn.Mn toxicity, either caused by Mn supply or induced by high P application, could be overcome by large Ca application in solution culture and by liming in the soil. Furthermore, the absolute levels of Ca and P in the substrate appeared to be more important than their ratios in affecting Mn toxicity.The implications of the results for fertilizer practice are discussed. Mn toxicity is suggested as an explanation of some cases of lack of response to P application, normally attributed to P fixation by the soil.

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