Optimizing utilization of nitrogen fertilizer under some intercropping systems of groundnut and maize in sandy soil [electronic resource].

Includes references.

Two field experiments were conducted at the agricultural research station in North Sinai Governorate during the two seasons of 2003 and 2004 the aime of this study was optimizing nitrogen fertilization utilization and preferable nitrogen dose add to intercropping peanut (Giza 5) with maize (S.C.10) under two planting systems; bed and ridge. Sex doses of nitrogen were added to .both crops i.e., 40 kgN/fed. (recommended nitrogen dose for solid peanut in desert), 125 kg N/fed (recommended nitrogen dose for solid maize), 145 kg N/fed. (recommended nitrogen dose for maize + 1/2 recommended nitr~gen dose of peanut), 102.5 kgN/fed (recommended nitrogen dose of peanut + 1/2 recommended nitrogen dose of maize), 82.5 kgN/fed. (1/2 recommended nitrogen dose of both crops), 165.0 kgN/fed. (recommended nitrogen dose of both crops together), and two recommended doses for both solo crops (125 kgN/fed. for maize and 40 kgN/fed. for peanut in the sandy soil). Split plot design in 4 replications was used. The main plots were devoted to planting systems and the sub¬plots were devoted to nitrogen doses. Peanut was planted on all the ridges on one side and on the beds on both sides in hills at distance 01.10 cm and thinned to two plants/hill. the plant densities of both of ridge and bed systems were 140,000 plants/fed. Maize was planted on the other side of the ridge in hills at distances 30 cm, plant thinned on one plants/hill and left one ridge free, while in bed systems. maize was planted in the middle of the bed at same distances. of ridges, the plants were thinned on two plantslhill. Maize plant densities in both systems were 23200ptantslfed.

Summary in Arabic.

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