Critical P, K and S Concentrations in Soil and Shoot Samples for Optimal Tedera Productivity and Nodulation

Tedera is a forage legume that can provide out-of-season green feed in Mediterranean climates. To date, growers have had no comprehensive soil nutrition guidelines to optimise tedera production. We undertook field and glasshouse studies understand tedera’s macronutrient requirements. Three experiments were sown with cv. Lanza® at Cunderdin, Dandaragan Springs Western Australia. These evaluated seven levels of phosphorus (P) (0–30 kg ha−1) potassium (K) (0–80 two combined treatments P K. Glasshouse pot conducted using cultivars Palma lucerne cultivar SARDI Grazer. Ten concentrations added (0–256 mg kg−1), ten K kg−1) sulphur (S) (0–16 tested. There was significant response or soils Cunderdin Springs. Dandaragan, but produced positive the July October growing season cuts. In glasshouse, reached peak productivity lower Colwell (7.6 12 than (22 kg−1). moderate biomass response, did not show (0.8 142 S (1.3 12.5 Nodulation greatly reduced extremes treatments. For first time, these results allowed us establish for optimal use benchmark shoot nutrient status their pastures assess economic benefit correcting deficiencies.