Publication Date
1993
Description
Granitic soils comprise more than 15% of productive land of the country, Soils are variable, all being deficient in nitrogen and phosphorus, having a moderately low pH, more than 40% being shallow with low levels of organic matter. Livestock production is predominantly developed on range with moderate yield and ample variations (avg. DM/ha/year=3.l t; c.v.=27.6%; winter yield=l2%), Research conducted to improve this situation, evaluated: 1) range P fertilisation during 5 years, which resulted in a small (but significant) yield increase and improved P concentration of forage. 2) P fertilisation and interseeding of legumes through different methods. Largest differences were due to legume; Lotus corniculatus cv. San Gabriel was easy to establish, productive and persistent (7-year avg. 6.8 t OM/ha/year; c.v.=19.6%). 3) P fertilisation of a legume mixture broadcast seeded after partial soil removal. Different levels of superphosphate and rock phosphate (Gafsa) for S· years promoted significant increase of forage yields, irrespective of source, At low levels, Lotus was highly efficient, productive and persistent; white clover presence increased at highest P levels.
Citation
Risso, D F. and Moron, D A., "Rangeland Improvement on Granitic Soils in Uruguay" (2024). IGC Proceedings (1993-2023). 12.
https://uknowledge.uky.edu/igc/1993/session46/12
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Rangeland Improvement on Granitic Soils in Uruguay
Granitic soils comprise more than 15% of productive land of the country, Soils are variable, all being deficient in nitrogen and phosphorus, having a moderately low pH, more than 40% being shallow with low levels of organic matter. Livestock production is predominantly developed on range with moderate yield and ample variations (avg. DM/ha/year=3.l t; c.v.=27.6%; winter yield=l2%), Research conducted to improve this situation, evaluated: 1) range P fertilisation during 5 years, which resulted in a small (but significant) yield increase and improved P concentration of forage. 2) P fertilisation and interseeding of legumes through different methods. Largest differences were due to legume; Lotus corniculatus cv. San Gabriel was easy to establish, productive and persistent (7-year avg. 6.8 t OM/ha/year; c.v.=19.6%). 3) P fertilisation of a legume mixture broadcast seeded after partial soil removal. Different levels of superphosphate and rock phosphate (Gafsa) for S· years promoted significant increase of forage yields, irrespective of source, At low levels, Lotus was highly efficient, productive and persistent; white clover presence increased at highest P levels.
