Journal of Agricultural Science and Technology
Journal of Agricultural Science and Technology
JAST
Agriculture
http://jast.modares.ac.ir
1
admin
1680-7073
2345-3737
10.22034/jast
en
jalali
1387
7
1
gregorian
2008
10
1
10
4
online
1
fulltext
en
Effects of Surface Soil Removal (Simulated Erosion) and
Fertilizer Application on Wheat Yield
An experiment involving erosion simulation was conducted at the Soil and Water Con-servation Research Center of the University of Tehran. A split-factorial plot with four replications was designed. Five soil desurfacing treatments of blank, 5, 10, 15, and 20 cm of soil surface removal (E0, E5, E10, E15, and E20) were carried out, respectively. Fertilizer treatments were 0, 65, and 130 kg ha-1 of urea (equal to 0, 30, and 60 kg ha-1 of pure N) and 0, 107, and 214 kg ha-1 of triple super phosphate (equal to 0, 50, and 100 kg ha-1 of P2O5). Wheat (Triticum aestivum), Sardary cultivar, was cultivated in November 2001. To-tal precipitation was 223 mm during the growing season and 336 mm for the whole year (23 September 2001–22 September 2002). In order to reduce the effect of drought stress, three supplementary irrigations were applied during the growing season (13mm each). The crop was harvested in July and plant density recorded. Grain, dry matter and straw yields, as well as 1,000 grain weight were determined. The results showed that erosion had a significant effect (P<0.05) only on dry matter and straw yields. Each centimeter of soil surface removal, induced a reduction of 0.8% in dry matter. Phosphorus fertilizer had a significant effect (P<0.01) on yield parameters, relatively compensating the negative ef-fects of erosion. Nitrogen fertilizer did not show any significant effect on the determined parameters.
Erosion,Wheat,Desurfacing,Productivity,Soil surface removal
317
323
http://jast.modares.ac.ir/browse.php?a_code=A-10-1000-2640&slc_lang=en&sid=23
M.
Gorji
M.
Gorji
100319475328460045185
100319475328460045185
No
Department of Soil Science, Faculty of Agriculture, University of Tehran, Tehran, Islamic Republic of Iran.
Department of Soil Science, Faculty of Agriculture, University of Tehran, Tehran, Islamic Republic of Iran.
H.
Rafahi
H.
Rafahi
100319475328460045186
100319475328460045186
No
Department of Soil Science, Faculty of Agriculture, University of Tehran, Tehran, Islamic Republic of Iran.
Department of Soil Science, Faculty of Agriculture, University of Tehran, Tehran, Islamic Republic of Iran.
S.
Shahoee
S.
Shahoee
100319475328460045187
100319475328460045187
No
Faculty of Agriculture, University of Kordestan, Sanandaj, Islamic Republic of Iran.
Faculty of Agriculture, University of Kordestan, Sanandaj, Islamic Republic of Iran.