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Microclimatic and Rooting Characteristics of Narrow-Row versus Conventional-Row Corn

^a USDA-ARS, Land Management and Water Conserv. Res. Unit, Pullman, WA 99164
^b Skeen Hall N 140, New Mexico State Univ., Las Cruces, NM 88003

View larger version (18K): [in a new window]   Fig. 1. Intrarow and interrow root length density as a function of soil depth for corn sown in 0.38-, 0.57-, and 0.76-m rows. Root length was determined at the time of silking on 20 July 1998 and 27 July 1999. Bars indicate LSD values.

View larger version (17K): [in a new window]   Fig. 2. Fraction of photosynthetically active radiation (PAR) intercepted by the canopy as a function of thermal time from emergence for corn sown in 0.38-, 0.57-, and 0.76-m rows during the 1998 and 1999 growing seasons near Morris, MN. Bars indicate LSD values.

View larger version (17K): [in a new window]   Fig. 3. Diurnal trend in soil temperature, air temperature, and photosynthetically active radiation (PAR) on 24 June 1999 near Morris, MN. Soil temperature was measured at a depth of 1 cm in the intrarow (dashed lines) and interrow (solid lines) of corn sown in 0.38-, 0.57-, and 0.76-m rows.