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A Review of Soybean Yield when Double‐Cropped after Wheat
Author(s) -
Santos Hansel Damaris Sulzbach,
Schwalbert Rai A.,
Shoup Douglas E.,
Holshouser David L.,
Parvej Rasel,
Prasad P.V. Vara,
Ciampitti Ignacio A.
Publication year - 2019
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj2018.06.0371
Subject(s) - agronomy , yield (engineering) , sowing , mathematics , yield gap , crop , growing season , crop yield , biology , materials science , metallurgy
Core Ideas Relative to full‐season soybeans, the double‐crop soybean yield gap is delayed and full‐season soybean yields improved. As wheat yield improved, double‐crop soybean has lower probability of presenting greater yields than wheat. Previous wheat yield, and soybean planting date and maturity groups influenced the attainable yield for double‐crop soybeans.Soybean ( Glycine Max L.) planted after wheat ( Triticum aestivum L.) harvest in same season (double cropped [DC]) has the potential to increase productivity and sustainability. The objectives of this synthesis review were to (i) quantify attainable yield for DC soybean benchmarking against full‐season (FS) soybean; (ii) determine and build probabilistic response models on the effect of previous wheat productivity on DC soybean yields; and (iii) detect and rank factors influencing DC soybean yields via a decision inference tree analysis. A global database on DC soybean studies collected from 1976 to 2017 was divided into three data sets: (i) FS and DC soybean ( n = 141 data points); (ii) wheat and DC soybean ( n = 463); and (iii) production factors and DC soybean ( n = 547). Analysis showed that the yield gap between FS and DC soybeans increased from ‐31 to 1160 kg ha −1 as FS yield improved from 1500 to 3000 kg ha −1 . Even though the proportion of the variation accounted for wheat yields in the DC soybean/wheat yield ratio was low ( R 2 = 0.15), the probability of soybean yield being equal to wheat yield was 0, 20, 30, and 55% for wheat yields of ≥6, ≥4 and <6, ≥2 and <4, and <2 Mg ha −1 . Inference tree analysis indicated that the major factor impacting success of the DC system was wheat yield followed by soybean planting date and maturity group.