TY  - SER
AU  - Abou Yuossef,M.F.
AU  - El-Eweddy,E.A.
TI  - Effect of tillage and nitrogen application regime on: I. Yield and nitrogen content of sunflower cultivated under calcareous soil conditions
KW  - Sunflowers
KW  - Fertilizers
KW  - Yield
KW  - Nitrogen fertilizers
KW  - Calcareous soils
KW  - Tillage
KW  - Cropping systems
N1  - Includes references
N2  - The use of conservation tillage methods, including notillage, has increased dramatically in recent years. At the present time, there is great concern that farmers are applying more nitrogen (N) fertilizer than is environmentally or economically sound. In order to determine if N requirement for optimum yield differs with tillage system, tests were initiated to study tillage and N dose effects on N content and yield of sunflower. The study was established in 2002 on calcareous soil, Maryout soil. Two rates of N (0, and 45 kg /fed.) were applied to plots managed with 3 tillage Systems: chisel plow, moldboard plow, and no-tillage. The nitrogen was supplied as 2, 3 and 4 splits dose divided to equal portions
UR  - http://nile.enal.sci.eg/EALE/2003/ZJAR/3003/1/231.pdf
ER  -