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Weed Community as an Indicator of Summer Crop Yield and Site Quality

^a Dep. Ciencias Nat., Facultad Ciencias Exactas Fisico-Quimicas y Nat., Univ. de Río Cuarto, Ruta 36, km 601, 5800 Río Cuarto Cba., Argentina
^b IFEVA Fac. de Agronomía, Univ. de Buenos Aires, Av. San Martín 4453 (1417), Buenos Aires, Argentina

View larger version (20K): [in a new window]   Fig. 1. Ordination diagram of second and third canonical axes of corn and soybean fields sampled in the Argentine Rolling Pampas represented by their weed communities. Eigenvalue given for each axis represented the variance in the data matrix attributed to that axis. Management variables are represented by lines

View larger version (37K): [in a new window]   Fig. 2. Functional structure expressed in origin and morphotype in the different weed communities found in corn and soybean fields in typical Argiudol soils in the Argentine Rolling Pampas

View larger version (40K): [in a new window]   Fig. 3. Functional structure expressed in origin and life cycles in the different weed communities found in corn and soybean fields in typical Argiudol soils in the Argentine Rolling Pampas