Direct and Residual Effects of Green Manure on Some Soil Physical Properties of Desert Plain Soils and Wheat (Triticum aestivum L.) Yield in New Hamdab Scheme, Northern State, Sudan

Imran A. Ahmed, Mahmuod M. Ahmed, Muawia E. Hamad


This study was undertaken to investigate the direct and residual effects of four green manures  on soil dry bulk density, total porosity and soil moisture of a desert plain soil, and on wheat grain yield during three successive seasons 2014/15 (direct effect), 2015/16 (direct and residual effect) and 2016/17 (residual effect). The manures were green gram (Vigna radiate), cowpea (Vigna sinensis), lablab bean (Dolichos Lablab) and sesbania pea (Sesbania canabina). Three seed rate levels were used for cultivating each manure. The first seed rate levels for the successive manures were 12, 18, 24 and 12 kg ha-1. The second rate levels was two-fold and the third rate levels was three-fold. The treatments were arranged in a randomized complete block Design with three replicates. Land preparation was done manually for the residual effects of green manure so as not to disturb the treatments, which were assigned to the same plots during the experimental period. The results showed that the direct and residual effects of green manure were significantly effective in improving the soil physical properties under investigation. The soil bulk density was significantly (P ≤ 0.001) reduced while the soil total porosity and percentage of soil moisture were significantly (P ≤ 0.001) increased in response to the application of green manure. The result also showed that the direct and residual effects of green manure caused significant (P ≤0.001) increase in the grain yield of wheat on the desert plain soils.


Desert plain soil; green manure; New Hamdab

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