Precision Agriculture

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Presentation transcript:

Precision Agriculture David Mulla, Director Precision Ag Center University of Minnesota

What is Precision Agriculture? A management practice applied at the right rate, right time, and right place Customized field management Nutrients Drainage or irrigation Insects and weeds Tillage and seeding operations

Benefits of Precision Agriculture Increased profitability Increased efficiency of inputs Reduced environmental pollution

Conventional Agriculture Uniform management based on Average field conditions Best field conditions Uniform management ignores spatial and temporal variability in crop growth and soil or landscape features It leads to overuse of farm inputs

U of M is a Leader in Precision Agriculture Precision Agriculture was developed at the U of M in the early 1980s U of M founded the International Conference on Precision Agriculture in 1992 The first Precision Agriculture Center in the world was established at the U of M in 1995 U of M founded the Precision Agriculture journal in 2000

Multidisciplinary Collaboration Drives Precision Agriculture Precision Agriculture research at the U of M involves over twenty faculty members from CFANS (6 depts.) and CSE (2 depts.), and the Waseca, Lamberton, and Crookston Research and Outreach Centers NSF, USDA and MN Agencies/Legislature have provided major funding for Precision Agriculture at U of M MnDrive, AGREET enabled hiring new Precision Agriculture faculty Robotics Sensors and Manufacturing Center in CSE Strong history of international collaboration

Precision Farming Management Examples Tractor auto steer Yield mapping Variable rate fertilizer Variable rate irrigation Variable rate herbicide Variable rate seeding Grid or management zone soil sampling Adoption rates vary from 20% to 90%, depending on practice. CropLife-Purdue Univ. survey 2019

Precision Agriculture is High Tech! Global Position Satellites GIS and mapping software Yield monitors Computer modeling Remote sensing Proximal sensors Digital soil and elevation maps Deep learning algorithms, Big Data Specialized farm equipment, drones and robots

Precision Agriculture: Example Impacts Variable Rate Nitrogen (VRN) for improved surface water quality Soybean aphid detection Nitrogen and irrigation management for ground water protection University-Industry collaboration Job creation and workforce development Extension and Outreach to agribusiness and growers

Nitrate Contamination of Surface Waters High nutrient losses from southern Minnesota are due to: High fertilizer and manure application rates on corn, and mineralization of soil organic matter Precipitation patterns that cause leaching and loss of nitrate through subsurface drain tiles Long-term goals to reduce nitrate-N loads include a 45% reduction, Minnesota interim target is 20% by 2025

Variable Rate Nitrogen (VRN) Match side-dress N fertilizer application to crop growth patterns Use remote sensing to detect N deficiency in leaves

Variable Rate Nitrogen Research Objectives To utilize remote sensing to determine the need for in-season variable rate N-fertilizer applications To assess agronomic and environmental outcomes from management

Variable Rate N Research in Maize

Robotics in Precision Agriculture Unmanned ground vehicles (UGV) Unmanned aerial vehicles (UAV) Use of UAVs in Minnesota agriculture could lead to a thousand new jobs and nearly $150 million being pumped into the economy. (Dept. Employment Econ. Development)

Visible Absorption Spectrum Pigments absorb light in wavelength dependent regions.

VRN Corn N Fertilizer Rate Add 50 lb/ac VRN Rate (62 lb/ac)

VRN Fertilizer Side-Dressing at V6-V7 Raven Controller Toolbar

Impacts of VRN on Yield and N Fertilizer Use VRN subfields in green received 20-30% less N than uniform subfields, with no significant impact on yield (2016-2017) 120 lb N/ac Control

Regional Benefits of Variable Rate N on Water Quality: Nitrate Losses to Subsurface Tile Drains 45% Reduction in Wet Years 30% Reduction in Normal Year

Soybean Aphid Detection Using Remote Sensing Invasive species originating from Asia Yield losses up to 40% Spread of the soybean aphid in north central USA Image credit: Ragsdale et al. 2011

Remote Sensing as an Alternative to Crop Scouting for Soybean Aphids Routine scouting of soybean fields for soybean aphid is time consuming and inefficient Soybean aphid outbreaks are erratic and timing can fluctuate Chemical management is only recommended when populations exceed 250 aphids per plant Scouting only assesses 20-40 plants in a field, leading to incomplete coverage Aphid populations can rapidly increase and cause yield loss, 84% of growers want to reduce scouting efforts Remote sensing allows early detection of soybean aphids

Remote Sensing for Soybean Aphids Weekly imaging with a drone can accurately detect areas with aphid populations that exceed the economic threshold for spraying

Remote Sensing Combined with Machine Learning Identifies Infestations Above Threshold Drones can be used to scout entire fields for soybean aphids Fields can be sprayed before aphids cause widespread crop damage

Groundwater Contamination with Nitrates About 5-10% of private wells have NO3- concentrations that exceed 10 mg/L About 1% of public wells exceed 10 mg/L

N Fertilizer Management in Irrigated Corn/Potatoes Corn and potatoes are produced in the irrigated Central Sands region of Minnesota Nitrate leaching to groundwater is a concern Research is underway to develop agricultural chemical best management practices that will prevent, minimize, reduce, and eliminate the source of groundwater degradation

BMPs of Interest Nitrogen fertilizer practices (rate, timing, splits, spoon feeding, etc.), forms of N (anhydrous, urea, slow release) Water management practices (checkbook method, irrigation scheduling, variable rate irrigation) Vegetative management practices (cover or catch crops, perennial crops, cropping systems)

Irrigated Research Objectives at Westport, MN To measure and model nitrate-N leaching losses on irrigated coarse textured soils with: corn-corn (C-C), corn-soybean (C-Sb) and soybean-corn (Sb-C) rotations N application rates on corn of 0, 100, 200, 250 and 300 kg N ha-1 (two split applications) Improved irrigation management strategies With rye cover crop

Percolation, N Leaching and Crop N Uptake Reducing N rate by 33% and using slow release fertilizer reduces N loss by 21-22%, with small reductions in crop yield

Improved Irrigation Reduces Percolation and N Leaching Improved irrigation reduces N leaching by 6- 14% relative to conventional irrigation

Impacts of Cover Crops on N Leaching Loss Rye cover crops reduce N losses by about 25% relative to no cover crop Higher N uptake occurs if rye is planted after soybeans (in the Sb-C rotation) Reductions relative to no rye in the period between harvest and planting of the main crop

Impacts of Perennial Crops on Nitrate Loss N leaching losses were 83% and 99% lower in switchgrass and Kernza©, compared with corn Average of results from experiments at Crookston, Lamberton and Waseca

Impact of Precision Agriculture on Agribusiness Precision Agriculture led to formation of hundreds of companies nationwide who provide services to growers Local examples include SoilTeq, Farmer’s Edge, Geosys, Sentera, Sentek, EarthScout and Aglytix, with large portfolios by Land O’Lakes and CHS These have large impacts on Minnesota jobs and workforce development and placement “Our relationship with Professors David Mulla, Carl Rosen, Fabian Fernandez, and Daniel Kaiser has and will continue to have a tangible impact both on technological development at Sentek as well as on end-user applications revolving around our products.” Craig Poling, CTO Sentek

Federal and State Funds Leveraged NSF National Robotics Initiative (NRI) USDA Agriculture and Food Research Initiative (AFRI) USDA Foundational Ag Engineering NSF Cyber Innovation for Sustainability Sci. (SEES) MDA (AFREC and Clean Water Research) MN Corn, Soybean and Wheat commodity groups CFANS investment in Variable Rate Irrigation at new Becker Sand Plain Research Farm MN State Legislature MNDrive funding for faculty and graduate students AGREET funding for faculty

Extension and Outreach Activities The University of Minnesota Extension has several ongoing programs that are very effective at delivering information about precision agriculture to nutrient management decision maker audiences Online and in-person delivery On-farm demonstrations Our face to face programs are designed to reach a broad audience, including agribusiness professionals, growers, agency personnel and the public Ag Professionals transmit this training to thousands of growers

Specific Extension and Outreach Programs Institute for Agricultural Professionals Crops and Pest Management Short Course (with MN Crop Production Retailers) Field School for Ag Professionals (hands on learning program) Research Updates for Ag Professionals Nitrogen: Minnesota's Grand Challenge and Compelling Opportunity Conference Series for agribusiness professionals Nutrient Management Conference Nitrogen Smart, a training program intended to deliver the fundamental principles of nitrogen management mainly for farmer audiences to help them understand current issues related to nitrate in surface and ground water and enable them to make well informed choices to potentially address these issues Best of the Best – joint UofM and NDSU program for the Red River Valley In addition we reach audiences through regular and timely podcasts, blogs, and online short videos (YouTube) on targeted topics Nutrient Management Extension webpages are mobile friendly We extensively use social media channels to increase coverage

Benefits of Precision Agriculture Increased profitability and reduced crop loss for growers Increased efficiency of inputs (N fertilizer, pesticides, irrigation) Protection of surface and ground water quality Strong University – Industry and grower partnerships Job creation and workforce development Effective Extension and Outreach

Thanks! David Mulla mulla003@umn.edu (612) 625-6721 http://www.precisionag.umn.edu/ David Mulla mulla003@umn.edu (612) 625-6721