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Interpretive Summaries:
2002 - Fertilizing Rice-Based Cropping Systems to Achieve Maximum Yields While Maintaining the Natural Resource Base
2001 - Fertilizing Rice-Based Cropping Systems to Achieve Maximum Yields while Maintaining the Natural Resource Base
2000 - Fertilizing Rice-Based Cropping Systems to Achieve Maximum Yields while Maintaining the Natural Resource Base
Fertilizing Rice-Based Cropping Systems to Achieve Maximum Yields while Maintaining the Natural Resource Base, 2000
A long-term cropping systems study was initiated in 1999 on a silt loam soil near Stuttgart, Arkansas. The field was leveled, and 10 cropping systems (rice, corn, soybean, wheat in different combinations/rotations) were established using conventional tillage practices with four replications. In 2000, the plots within each cropping system were split into conventional tillage and no-tillage treatments. Each tillage treatment was split into two fertilizer treatments: 1) standard recommended fertilizer according to soil tests and 2) an enhanced treatment, consisting of approximately 20 percent more N-P2O5-K2O than the standard. Soil and plant samples were collected from each treatment in 2000 to evaluate effects on soil fertility, soil C and N levels, plant nutrition, and soil physical properties. There were visual differences between the two fertility treatments in 2000, but no significant effects on yield. Crop rotation scheme, tillage treatment, and crop variety explained most of the yield differences observed among the systems. Differences between fertility treatments may not be manifested until later years. AR-20F
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