Straw return: it can feed the soil and also burn or steal nitrogen
Carbon without extra nitrogen is a tug-of-war at the seedling.
- After return, seedlings yellow and weak; coarse unpressed straw also blocks emergence.
- The soil runs a fever and borrows nitrogen.
- Straw stealing nitrogen is one kind of nitrogen shortage — microbes eat first.
- Diseased straw feeds soil-borne disease. A badly diseased field needs the trash handled.
- Don’t sow under long straw; don’t skip the nitrogen IOU and still plant at full density.
- Add nitrogen: A few kg urea per mu, by how much straw. Follow the local agronomist, and watch nitrogen steal
- Name what you see before you feed.
- If leaves, roots and the surface disagree, stop.
What you see in the field
After return, seedlings yellow and weak; coarse unpressed straw also blocks emergence. The soil runs a fever and borrows nitrogen.Rub a handful next to a darker neighbour that still forms crumbs. Pale dusty soil that leaks after rain matches this page. Yellow leaves are extra — first ask whether the soil still has body.
Tap to enlarge. The caption says what to photograph. Missing field photos are marked as to-be-added.
Why it looks like this
The field looks like this because the root cannot take water or nutrients the usual way. Fix the soil condition first — drainage, salt, acidity, compaction or a salt of fertiliser — then a thin feed. Rates live in the range on this page; confirm with a local station and the label.
Easy to mix up
Looks like “Nitrogen shortage”
Straw stealing nitrogen is one kind of nitrogen shortage — microbes eat first.
Looks like “Diseased trash”
Diseased straw feeds soil-borne disease. A badly diseased field needs the trash handled.
Do this / don’t do that
- 1Compare the worst plants with a neighbour ridge. Photograph whole plant, close-up and soil surface before you add fertiliser.
- 2Match roots, leaves and the soil surface to this guide. If they do not line up, do not copy a bag count.
- 3Use the rate range on this page only as a range. Confirm with a local station and the product label.
Don’t do this first
- Don’t sow under long straw; don’t skip the nitrogen IOU and still plant at full density.
Rate range
Add nitrogen
A few kg urea per mu, by how much straw
Follow the local agronomist, and watch nitrogen steal.
Chop length
As short and even as you can
Don’t leave it in heaps.
These are ranges. Confirm with your local extension station and the product label.
How soon after a spray or a feed it showed
A 1–3 day burst looks more like spray injury / fertiliser burn.
When you see After return, test. Mix several spots of the tilled layer; skip the edge and the manure heap.
Lesson video
2026-03-21 · Li Zeyu · For learning. Serious damage: local agronomist or a soil test.
For learning only. Fertiliser and pesticide decisions need a local agronomist and a soil test.
Not sure? Photograph the field to identify the problem