To avoid a nitrate depression period when it is added to a garden soil,about how many kg of nitrogen must be added to a load of grass clippings that contains 1000 kg of C and 25 kg of N?

Question

Quizplus · Accepted Answer

The C:N ratio of the grass clippings is 1000:25 = 40:1. To avoid a nitrate depression period, the C:N ratio of the amended soil should be about 20:1. Therefore, 20 kg of nitrogen must be added to the grass clippings.

To Avoid a Nitrate Depression Period When It Is Added