Enabling Regenerative Agriculture Using Remote Sensing and Machine Learning
Author:
Ogungbuyi Michael Gbenga1, Guerschman Juan P.2ORCID, Fischer Andrew M.3ORCID, Crabbe Richard Azu4ORCID, Mohammed Caroline1, Scarth Peter2, Tickle Phil2, Whitehead Jason5, Harrison Matthew Tom1ORCID
Affiliation:
1. Tasmanian Institute of Agriculture, University of Tasmania, Launceston, TAS 7248, Australia 2. Cibo Labs Pty Ltd., 15 Andrew St., Point Arkwright, QLD 4573, Australia 3. Institute for Marine and Antarctic Studies, University of Tasmania, Launceston, TAS 7248, Australia 4. Gulbali Institute, Charles Sturt University, Albury, NSW 2640, Australia 5. Cape Herbert Pty Ltd., Blackstone Heights, TAS 7250, Australia
Abstract
The emergence of cloud computing, big data analytics, and machine learning has catalysed the use of remote sensing technologies to enable more timely management of sustainability indicators, given the uncertainty of future climate conditions. Here, we examine the potential of “regenerative agriculture”, as an adaptive grazing management strategy to minimise bare ground exposure while improving pasture productivity. High-intensity sheep grazing treatments were conducted in small fields (less than 1 ha) for short durations (typically less than 1 day). Paddocks were subsequently spelled to allow pasture biomass recovery (treatments comprising 3, 6, 9, 12, and 15 months), with each compared with controls characterised by lighter stocking rates for longer periods (2000 DSE/ha). Pastures were composed of wallaby grass (Austrodanthonia species), kangaroo grass (Themeda triandra), Phalaris (Phalaris aquatica), and cocksfoot (Dactylis glomerata), and were destructively sampled to estimate total standing dry matter (TSDM), standing green biomass, standing dry biomass and trampled biomass. We invoked a machine learning model forced with Sentinel-2 imagery to quantify TSDM, standing green and dry biomass. Faced with La Nina conditions, regenerative grazing did not significantly impact pasture productivity, with all treatments showing similar TSDM, green biomass and recovery. However, regenerative treatments significantly impacted litterfall and trampled material, with high-intensity grazing treatments trampling more biomass, increasing litter, enhancing surface organic matter and decomposition rates thereof. Pasture digestibility and sward uniformity were greatest for treatments with minimal spelling (3 months), whereas both standing senescent and trampled material were greater for the 15-month spelling treatment. TSDM prognostics from machine learning were lower than measured TSDM, although predictions from the machine learning approach closely matched observed spatiotemporal variability within and across treatments. The root mean square error between the measured and modelled TSDM was 903 kg DM/ha, which was less than the variability measured in the field. We conclude that regenerative grazing with short recovery periods (3–6 months) was more conducive to increasing pasture production under high rainfall conditions, and we speculate that – in this environment - high-intensity grazing with 3-month spelling is likely to improve soil organic carbon through increased litterfall and trampling. Our study paves the way for using machine learning with satellite imagery to quantify pasture biomass at small scales, enabling the management of pastures within small fields from afar.
Funder
University of Tasmania
Subject
Nature and Landscape Conservation,Ecology,Global and Planetary Change
Reference66 articles.
1. Carbon myopia: The urgent need for integrated social, economic and environmental action in the livestock sector;Harrison;Glob. Chang. Biol.,2021 2. Simulated seasonal responses of grazed dairy pastures to nitrogen fertilizer in SE Australia: N loss and recovery;Christie;Agric. Syst.,2020 3. Livestock production: Recent trends, future prospects;Thornton;Philos. Trans. R. Soc. London. Ser. B Biol. Sci.,2010 4. Abberton, M. (2010). Proceedings of the Workshop on the Role of Grassland Carbon Sequestration in the Mitigation Of Climate Change, Food and Agriculture Organisation. 5. Franzluebbers, A.J. (2010). Grassland Carbon Sequestration: Management, Policy and Economics. Integrated Crop Manage, Food and Agriculture Organisation.
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