Richard Simpson

Research Agronomist, CSIRO

[Tom Toose @ttoose]

Don’t worry about phosphate prices, worry about leaving it out...

[Dr. Geoff Anderson @GeoffAnderson09]

Please see our new paper with the main conclusion soil Al measurement is a more sensitive at measuring the impact of lime than soil pH ⁦@Agronomy_Mdpi⁩ ⁦@DPIRDbroadacre⁩ https://t.co/tluBXB4dy7

[Richard Simpson @rickjsimpson]

@JoYohana @gsandral Gourley et al. 2019 The developmt & applicatn of functions describing pasture yield responses to P K & S...... Crop & Pasture Sci. https://t.co/g3dTH76cbu

Describes determination of critical soil test benchmarks for managing soil fertility under clover-based pastures.

[Richard Simpson @rickjsimpson]

Note - landmark papers on soil fertility management benchmarks for Aust pastures this issue.#P4Pastures

[Stuart Kemp @pasturewise]

Check out our special edition in Crop and Pasture Science! https://t.co/uzXaaQeyME
Great work by our editor Brendan Cullen and the whole committee. Next one will be in Perth! Get your abstracts in now! https://t.co/6j9YTEGOjA

[Simon Kuestenmacher @simongerman600]

Map shows the number of scientific and technical journal articles per 1 million population in 2018. Source: https://t.co/5aqsZ6hRGm

[GRDC @theGRDC]

How well are you feeding the 'underground livestock' in your soils? #ausag #agchatoz https://t.co/DGEKC8snga

[Daniel Kidd @Daniel_Kidd01]

The final screen of aluminium tolerance. I'm never nice to my plants. No topsoil just wodjil subsoil. 😬 Bitey Al > 20mg/kg and < pH4 with lime and gypsum trts too. Testing serradella varieties with reference wheat, subclover, medic and lucerne #P4Pastures

[Rowan Smith @DrRWSmith]

Some pastures knowledge amongst this group! Checking out some pod set in #serradella learnt so much this week - benefits of collaboration TIA/UTAS CSIRO ⁦@TasInAg⁩ ⁦@rickjsimpson⁩ ⁦@Laura_Goward⁩ ⁦@bethpenrose⁩

[Richard Simpson @rickjsimpson]

@bethpenrose @rickchayes @pasturewise There has been a lot done in the past - especially blackheaded version. Start with a literature search (entomology research).

[Doug @Monaro_Sheepo]

Avila Yellow Serradella is still battling on at the Bombala #P4Pastures trial in the face of one of the worst springs of the past 50 years. We need rain very soon!

[David Cornish @barnoolut]

Holmes and Sackett have just published a very important paper on the economics of so called regenerative farming. Well worth a read

https://t.co/UCh4SHkB3z

[Richard Simpson @rickjsimpson]

Useful experiment inspection hosted by Tableland Farming Systems at this #P4Pastures site yesterday. Remarkable amount of Avila and Margurita serradella still present in persistence trials. Badly need an "average" season to test the potential of these legumes in this region.

[Richard Hayes @rickchayes]

Visual assessment of #P4Pastures trial near Gunning supports early data showing differences in soil water: subclover 20% greener in low P fertility plots, likely due to conserved moisture. Forecast suggests this diff. might be short-lived. Piks show scale, 10-90% green.

[Richard Simpson @rickjsimpson]

Pasture field day - update on #P4Pastures P efficient pasture research.
Story so far...Jim Virgona (Graminus Consult); Serradellas for Tableland environmts?..Rich Simpson (CSIRO); Summer active pasture...Rich Culvenor (CSIRO); Perrenial legume persistence...Rich Hayes (NSW DPI)

[Richard Hayes @rickchayes]

For those in the Gunning/Crookwell region, details of the TFS Parasites and Pastures field day next Tuesday (12/11) afternoon: https://t.co/I2RpelmBVE @agronomybrady @rickjsimpson @j_virgona

[Richard Simpson @rickjsimpson]

@Steve_Clark Leura & Goulburn sub clovers are the gold standards we use as controls in this research. Excellent varieties. However we get equiv yield (but not the persistence , yet) from some of the serradellas at lower soil P levels. Sandral at al. 2019 Crop & Pasture Science

[Richard Simpson @rickjsimpson]

Serradellas & Leura sub clover under irrigation to ensure establishment of #P4Pastures experiment in this seriously dry year. Serradella persistence being followed on moderately P-deficient soil (Murrumbateman, NSW). P efficiency of serradellas already evident.

[Richard Hayes @rickchayes]

Serradella looking ok and flowering, but sub clover almost completely dead at the #P4Pastues trial site near Adaminaby. A promising result in a tough year, highlighting the importance of using appropriate serradella cultivars in these harsh environments. ⁦@newellm_matt

[The Land @thelandnews]

Set a soil fertility target and improve productivity https://t.co/jz1N7qjUx4

[Daniel Kidd @Daniel_Kidd01]

....and slender serradella is no more tolerant

[Daniel Kidd @Daniel_Kidd01]

What 2 weeks of waterlogging does to French and yellow serradella. #P4Pastures #serradella #PhD @IOA_UWA

[Richard Simpson @rickjsimpson]

Currently reading - https://t.co/uaEDxcNPUw