World Grain - January 2025 - 62
Brazil, Argentina
drying out
by Drew Lerner
L
La Niña-like conditions threaten South American crops
Topsoil moisture on Dec. 31 was rated margina
Niña still has not evolved after various computer
forecast models were predicting it was imminent
since last spring. Changes in ocean surface temperatures
finally have become significant enough that
traditional La Niña-biased conditions are beginning to
show up around the world. An official La Niña event
may not ever evolve, or if it does evolve it only will last
a month or two because of predicted warming temperatures
in the eastern equatorial Pacific Ocean later this
winter and spring.
In the meantime, the significant change in ocean surface
temperatures during December has brought rainy
weather to Indonesia, South Africa and center-west
through center-south Brazil while dryness is evolving
in Argentina, Uruguay, southern Paraguay and far
southern Brazil.
The drier- and warmer-biased weather expected in
portions of South America was expected to become
quite significant during the early to middle part of
January and possibly into the latter part of the month.
Not all the summer crops were planted at the end of
December. Early seeded corn and sunflower seed were
developing well due to favorable soil moisture and
timely rainfall through December.
Drier-than-usual conditions in late December firmed
the topsoil, but good subsoil moisture maintained
good summer crop development for well-established
crops. In contrast, the more recently planted crops are
facing the potential for poor emergence and establishment
due to dwindling topsoil moisture. Some delay
to late season crop planting is likely because of poor
surface moisture that is needed to induce germination
and plant emergence.
62
ally adequate to short, with a few fields very short
of moisture. These conditions were occurring with
" normal " temperatures. A warming trend in early
January along with little to no rain was expected to
accelerate the drying trend and topsoil moisture was
expected to be rated short to very short in most of the
nation except the far west and extreme north by Jan.
9. The following week was expected to see subsoil
moisture decline as well, bringing on the first week
of general crop moisture and heat stress.
A single week of stressful conditions will not permanently
harm crops, especially if rain develops after
that event and temperatures trend cooler. Most of the
medium- and long-range forecast models suggested
scattered showers and thunderstorms with some slight
cooling would occur during mid-January. But with La
Niña-like conditions still prevailing, the odds are quite
high that declining soil and crop conditions will resume
later in the month.
These conditions not only will impact central and
east-central Argentina, but southern Paraguay, portions
of Rio Grande do Sul and Uruguay as well. Some
drying is possible in Santa Catarina, Parana and Mato
Grosso do Sul, though these areas have a relatively
good chance for timely rain that will help reduce the
potential for serious crop stress.
There were some signs of possible change noted
in early January. The Southern Oscillation Index was
falling along with the Antarctic Oscillation index.
Both indices suggested weakness in the La Niña-like
conditions would show up during mid-January. That
implies an opportunity for scattered showers and
January 2025 / World Grain / World-Grain.com
©Giovani Dressler-stock.adobe.com
http://www.World-Grain.com
World Grain - January 2025
Table of Contents for the Digital Edition of World Grain - January 2025
World Grain - January 2025 - Intro
World Grain - January 2025 - 1
World Grain - January 2025 - 2
World Grain - January 2025 - 3
World Grain - January 2025 - 4
World Grain - January 2025 - 5
World Grain - January 2025 - 6
World Grain - January 2025 - 7
World Grain - January 2025 - 8
World Grain - January 2025 - 9
World Grain - January 2025 - 10
World Grain - January 2025 - 11
World Grain - January 2025 - 12
World Grain - January 2025 - 13
World Grain - January 2025 - 14
World Grain - January 2025 - 15
World Grain - January 2025 - 16
World Grain - January 2025 - 17
World Grain - January 2025 - 18
World Grain - January 2025 - 19
World Grain - January 2025 - 20
World Grain - January 2025 - 21
World Grain - January 2025 - 22
World Grain - January 2025 - 23
World Grain - January 2025 - 24
World Grain - January 2025 - 25
World Grain - January 2025 - 26
World Grain - January 2025 - 27
World Grain - January 2025 - 28
World Grain - January 2025 - 29
World Grain - January 2025 - 30
World Grain - January 2025 - 31
World Grain - January 2025 - 32
World Grain - January 2025 - 33
World Grain - January 2025 - 34
World Grain - January 2025 - 35
World Grain - January 2025 - 36
World Grain - January 2025 - 37
World Grain - January 2025 - 38
World Grain - January 2025 - 39
World Grain - January 2025 - 40
World Grain - January 2025 - 41
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World Grain - January 2025 - 64
World Grain - January 2025 - 65
World Grain - January 2025 - 66
World Grain - January 2025 - 67
World Grain - January 2025 - 68
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