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A June heat wave hurt Russia and Europe’s winter wheat harvests. Now, July weather is squelching hopes that Russia’s upcoming spring wheat crop will come to the rescue.
A Gro Intelligence analysis, using satellite data of growing conditions in Russia’s key spring wheat growing districts, suggests that the spring crop will equal, or be slightly below, current USDA forecasts. Any lessening of prospects for wheat in such major producing regions as Russia and the EU brightens the outlook for US wheat exports in coming months.
US exports are already expected to benefit from the high temperatures during June that prompted the USDA to reduce its estimates for 2019 Russian wheat production by 3.8 million tonnes and EU wheat production by 2.5 million tonnes. The USDA, in its July WASDE report, also called for reductions to wheat crops in Australia (down by 1.5 million tonnes), Canada (down by 1.2 million tonnes) and Ukraine (down by 1 million tonnes). In all, projections for non-US wheat production for the 2019 marketing year were cut by 10 million tonnes to 719 million tonnes. The USDA also increased its forecast for US wheat by a modest half-million tonnes.
Russia’s spring wheat crop is much smaller than the winter crop, at 19.2 million tonnes versus 55 million tonnes, according to the latest USDA estimates for 2019. Russian spring wheat is finishing the flowering stage in the important Ural and Volga districts and entering it in the dominant Siberia district. The three districts combined account for about 90% of the country’s spring wheat production.
An in-depth look at vegetative indices suggests there may be limited upside for the Russian spring wheat yield. Our analysis considered temperature, soil moisture, and NDVI for the three Russian districts for the first 15 days of July. We then ran a historical comparison (depending on the environmental metric, the historical data was available for between eight and 19 years) to see how those data related to crop yield.
Daily land surface temperatures in the first half of July averaged 25.9 degrees Celsius. Such temperatures are associated with a much lower-than-expected yield: 1.50 tonnes per hectare compared to USDA’s projection for 2019 of 1.67 tonnes. That 10% difference amounts to a decrease of 1.9 million tonnes of production, assuming the USDA’s projection of 11.5 million hectares is realized.
A more optimistic outlook comes from daily soil moisture readings for the first half of July. On average, moisture constituted 15.2% of each cubic meter of soil for the three Russian districts. This is a favorable sign for production and is associated with a yield 5% larger than what the USDA currently predicts. The implied yield of 1.76 tonnes per hectare would result in 1 million tonnes more spring wheat than the current forecast.
The third vegetative health measure we considered was NDVI, and it implied a more muted adjustment to yield than the previous two metrics. The measure consists of each day’s NDVI’s difference from its 10-year average, and of the three indicators is the most strongly associated with yield. Compared with the USDA forecast, this year’s NDVI deviation suggests a slight reduction in yield, to 1.66 tonnes per hectare in the three districts. That implies production of 19.14 million tonnes, which is just 64,000 tonnes less than the USDA forecast.
This simple analysis could be made more robust to reveal how influential each of the three measures of vegetative health is on ultimate yield and production, allowing a more nuanced weighting of the three. In any case, a simple average of the three results suggests a small reduction of 321,000 tonnes of Russian spring wheat from current forecasts.