About 2000 kg of wheat straw was applied to 1 ha of land.Tests showed the soil to contain 25 kg nitrate-N per ha. The straw contained0.4% N. How much N was applied in the straw? Explain why two weeks...

About 2000 kg of wheat straw was applied to 1 ha of land.Tests showed the soil to contain 25 kg nitrate-N per ha. The straw contained0.4% N. How much N was applied in the straw? Explain why two weeks after thestraw was applied, new tests showed no detectable nitrate N. Show your work andstate what assumptions or estimates you made to do this calculation.