J. Shierlaw

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Zea mays L. andLolium rigidum Gaud. were grown for 18 and 33 days respectively in pots containing three layers of soil each weighing 1 kg. The top and bottom layers were 100 mm deep and they had a bulk density of 1200 kg m−3, while the central layer of soil was compacted to one of 12 bulk densities between 1200 and 1750 kg m−3. The soil was labelled with32P(More)
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