Effect of crop retation systems and mineral fertilization on wheat productivity and improving some soil properties under Assiut condition
2011
Ahmed, M.M.M. | El-Azab, K.M.
A field experiment was conducted to detect the effects of crop rotation systems i.e. milletfallow -wheat (Si), millet temporary clover-wheat (S2) and cowpea-fallow-wheat (S3) and levels of NPK fertilizers i.e. 100, 80 and 60% of the recommended doses of NPK fertilizers on wheat yield and some soil properties. The study carried out for two consecutive years from 2008 2010 on a calcareous soil at the experimental farm of Arab ElAwammer Research Station, Agriculture Research Center, Assuit, Egypt. Results showed that all crop rotation under this study significantly reduced soil bulk density and increased soil EC, particularly S3 rotation which decreased bulk deAnsity by 9.9 and 7.2% and increased EC by 12.0 and 1.7% when compared with S1 and S2, respectively. Soil organic mater, total N, available P and K in soil were significantly high by using S3 rotation 47.3, 26.5, 107.0 and 34.2% higher compared with S1 rotation, respectively. Crop rotations, NPK fertilizers levels and its interactions significantly affected grain and bio-logical yields of wheat as well as its grain nutrients content. Wheat plants cultivated after cowpea and fertilized with 100% of the recommended doses of NPK gave the highest values of grains and biological yields as well as NPK-uptakes by wheat grains, followed by wheat plants fertilized with 80% of the recom-mended doses of NPK under the same crop rotation.
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