Tuesday, November 6, 2007
163-17

Impact of Rotation on Yield and Economic Performance in Winter Canola-Summer crops Cropping Systems.

Suresh Kumar1, Udai R. Bishnoi2, and Ernst Cebert2. (1) Plant and Soil Science, Alabama A&M University, Normal, AL 35762, (2) Plant and Soil Science, Alabama A&M Univewrsity, Normal, AL 35762

In the southeast US, winter wheat as a double crop has proved to be profitable and beneficial for soil management and profit to the farmers. Winter canola (Brassica napus L.) also has similar potential but its suitability as a double and in rotation with summer crops has not been evaluated. Therefore, performance of winter canola in rotation and as a double crop with soybean, corn, sorghum, and cotton were evaluated for two years. Rotational effects on canola plant height, number of pods per plant, and seed weight were non-significant than canola grown as fallow in 2003 but not in 2004. Plant density showed significant rotational effect during both the years. Canola grown after soybean produced significantly higher seed yield in 2003 (2739 kg ha-1) and 2004 (3129 kg ha-1) than after other crops except corn (2938 kg ha-1) and fallow (2876 kg ha-1). Planting canola after fallow gave significantly the lowest economic returns during both the years. Canola gave significantly higher economic returns when planted after corn ($1237) and cotton ($1169) than soybean-canola and sorghum-canola and fallow-canola rotation rotations in 2003. In 2004 also, canola planted after cotton gave significantly higher economic returns ($1442) which was equal to soybean-canola ($1393) than corn-canola ($ 1370) and sorghum-canola ($1084) rotations.

Back to Symposium--Scientific Advances in Crop Rotation Research During the Last Century: Where Do We Go from Here?: I
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