Article: Soybean yield and biomass responses to increasing plant population among diverse maturity groups: I. agronomic characteristics.

EARLY-PLANTED, short-season crops are useful for reducing irrigation requirement or for increasing rainfed yield in the presence of late-season drought (Edwards et al., 2003; Oad and Azim, 2002; Purcell et al., 2003), and for these reasons they have been widely adopted in the midsouthern USA (Heatherly, 1999). Success of short-season soybean (MG [less than or equal to] IV) production in the Midsouth is contingent on higher population and more narrow rows than those for full-season crops whether sown in early spring to avoid late-summer drought (Heatherly, 1999) or when sown later in a double-cropping system of soybean following winter wheat (Triticum aestivum L.) (Ball et ...

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