Grainews

Page 1

Volume 42, Number 15  |  SEPTEMBER 27, 2016

$4.25

PRACTICAL PRODUCTION TIPS FOR THE PRAIRIE FARMER

www.grainews.ca

DO IT WITH

DRONES photo: thinkstock

Harvest timing, fertilizer application, elevation mapping — drones are putting new information in farmers’ hands

By Staff

F

armers are buying drones, but often they can’t use the technology to its full potential, says Matt Johnnson. And new drone operators need to research the options available and safety requirements before flying, he adds. Johnson owns M3 Aerial Productions, based in Winnipeg. A math teacher by profession, he started using drones for real estate photography. But after doing more research, he realized the technology provides more return on investment in the agriculture industry. In 2016, he launched the agricultural side of the business. Farmers can buy their own drones or hire someone like Johnson to fly their fields. “I can show them what’s going on in their crops, and they have to be able to interpret it,” he says, adding he’s not an agronomist.

Publications Mail Agreement Number 40069240

While Johnson has worked with individual farmers, he prefers to work with agronomists or seed companies. This summer he did some work with General Mills, the University of Manitoba, Alliance Seeds, the Manitoba Forage and Grassland Association and independent agronomists.

How it works Johnson typically uses a fixed-wing drone called the AgEagle RX60. The drone has a GoPro camera with a special lens to take infrared imagery. It flies about 500 feet above ground level in a grid pattern, snapping a photo every 1.5 seconds. That creates about 500 pictures per quarter. After flying the fixed wing, he might use his quadcopter to zoom in on specific areas in the field. Johnson then uploads those images into a program that stiches all the images together, pixel by pixel, into one

cohesive image. The software also creates a normalized difference vegetation index (NDVI), which paints the field in a spectrum ranging from red to green. Plants that are healthy — growing and photosynthezing — show up as green on the imagery. Red areas indiciate plants that aren’t photosynthesizing as much, and so are likely struggling for some reason. But green patches can also indicate weeds, Johnson says, so it’s important to compare the imagery to “the truth on the ground.” This spring, Johnson flew a canola field with two different drones, using multiple sensors. “And the results that we got were very interesting because there was less growth happening in a strip about 200 feet wide that went right across the quarter section, right above where an underground pipeline was.” An agronomist would need to diag-

nose the specific problem and offer remedies. Johnson says they couldn’t see any differences within the crop with the naked eye, perhaps because the crop was at the six-leaf stage. Johnson thinks NDVI imagery could also help farmers with harvest timing. He flew some trial plots this summer, close to harvest. While some plots looked like they were ready to harvest, the NDVI imagery revealed that they were still actively growing. Other areas appeared yellow on the NDVI, which was a green light for harvest, he says. Johnson sees NDVI as potentially helpful when making short-term decisions such as where to apply fertilizer. He could also see it helping with longterm planning if farmers collected NDVI of crops just before harvest each year. Along with NDVI, farmers could also

In This Issue

» continued on page 4

Wheat & Chaff .................. 2 Features . ........................... 5 Crop Advisor’s Casebook . 6 Columns ............................ 21 Machinery & Shop............. 34 Cattleman’s Corner .......... 43

Northgate Terminal

sharing a sprayer

Lee hart page 12

Sarah hoffman page 22

FarmLife ............................ 49


Turn static files into dynamic content formats.

Create a flipbook
Issuu converts static files into: digital portfolios, online yearbooks, online catalogs, digital photo albums and more. Sign up and create your flipbook.