Effect of laser land leveling and width between furrows on water use efficiency and yield of soybean crop [electronic resource].

Includes references.

A field trial was conducted at Gemmiza Agricultural Research Station during (2004-2005) growing season to study the effect of land leveling and distance between furrows on soybean yield, some aspects of water management, irrigation efficiency. Split plot design with four replicates was used. The land leveling treatments (0.05%, 0.03% surface slope and traditional land leveling) with the main plots. The distances between furrows were (0.5m with sown on one side of the ridge and 1.0 m width between furrows sown on two sides of the ridge) treatments occupied the subplots.The results showed that the Laser land leveling treatments were 0.03 %, 0.05 %surface slopes, generally in both two furrows width (0.5, 1.0 m) and specially under surface slope 0.05 % compared with traditional method recorded positive effect as follows: 1.Decreasing the advance and recession times with ratio percentage about 25.55 %& 11.36 % in case of 0.5 m width and 25.0 % & 9.52 % in case of 1.0 m width respectively and the same trend with opportunity time. 2.Decreasing mean infiltration rate and cumulative infiltration depth with ratio percentage about 30.0% and 27.0 % in both two widths (0.5 m and 1.0 m) respectively. 3.Saving the applied water with a percentage about19.42 %and 29.74% in both two widths (0.5 m and 1.0 m) respectively. 4.Increasing water application efficiency with a percentage about 18.21% and 16.15% in both two widths (0.5 m and 1.0 m) respectively. 5. Increasing consumptive water with a percentage about 5.53% and 7.96% respectively 6.Increasing soybean yield with a percentage about 29.0% and 30.2% respectively. 7.Increasing water use efficiency with percentage about 6.0% and 8.0%in both widths (0.5m and 1.0 m) respectively.

Summary in Arabic.

1