Abstract
Several cultural techniques were tested for establishment of nitrogen fixing soybeans on heavy-clay, acid sulfate soils of different fertility at two locations. Holes of 2.5 cm deep were made by inserting a pointed pole into the surface soil. Soybean seeds were dropped into the holes and covered with either (i) Rhizobium inoculant, molybdenum (0.5 kg Mo/ha) and ash from burned rice husks (0.2 t/ha) or (ii) Rhizobium inoculant, molybdenum and local soil instead of the ash. Additional treatments evaluated were the use or absence of tillage and the presence or absence of a rice straw mulch (5 t/ha). Soybean plants treated with ash had the highest number of nodules per plant. The combination of mulching and ash treatments produced the highest soybean grain yields. Without ash all treatments produced low grain yields. Tillage had no effect.
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Duong, T.P., Diep, C.N. An inexpensive cultural system using ash for cultivation of soybean (Glycine max (L.) merrill) on acid clay soils. Plant Soil 96, 225–237 (1986). https://doi.org/10.1007/BF02374767
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DOI: https://doi.org/10.1007/BF02374767