TY  - JOUR
T1  - Multiyear Study on the Yield of Soybean as Affected by Humic Biostimulation at Uruguay
AU - Izquierdo, Juan AU - García Pintos, Gustavo 
JO  - Research Journal of Agronomy
VL  - 15
IS  - 1
SP  - 1
EP  - 6
PY  - 2021
DA  - 2001/08/19
SN  - 1815-9354
DO  - rjagr.2021.1.6
UR  - https://makhillpublications.co/view-article.php?doi=rjagr.2021.1.6
KW  - Humics
KW  -soybean
KW  -biostimulants
KW  -yield
KW  -climate change
KW  -R&D
AB  - Soybean (<i>Glycine max</i> L.) is of considerable
importance in Uruguay as an export crop, however,
significant variations in the production occur due to
the impact of prolonged droughts and/or extreme
temperatures mostly during the grain filling period.
Biostimulant Substances (BS) as the humics cause effects
on crops as better efficiency in nutrient absorption,
increases yield and root growth as well as tolerance to
abiotic stress. Data from farm trials during six years on
the effect of an humic bio stimulant applied at 4 L ha<sup>&#150;1</sup>
rate (treated) vrs (untreated check) at the R2-R3
development stage on crop strips across the farm field was
collected at 85 localities of 15 Departments of Uruguay.
The observed yield (g/plant) and the yield components
(pods/plant and grains/plant) were significantly increased
by the application of the humic substance in all years and
localities tested where soybean crops have endured a
range of different types of climates from water and hight
temperature stresses, excessive rainfall and years with
very favorable conditions. The historical behavior of the
humic biostimulation technique shows that it can be
adopted by soy producers under the evidence that the
yield per plant depends on the amount of pods and grains
per plant that are increased in all cases by the application
of humic. The exogenous application of humic SB as part
of the present agronomic management for extensive
soybean field crops can be used to promote sustainable
intensification. Further development of this technology
requires incorporating the topic of biostimulants within
the research programs of national agricultural R&D
institutions focusing on the mechanisms of action, forms
and times of application. This technology can be pursued
in legume crops as a short term and low cost improvement
to be adopted by soy farmers.
ER  -