Nutrient Balance & Applied vs Removed

It compares the nutrients you add to a field against what the crop takes away, and reports the balance, a surplus-or-deficit status and a recovery ratio. A field nutrient balance compares what you apply (fertiliser + manure) against what the crop removes — so you can see whether you are overspending, mining the soil, or close to right.

Balance is simply applied minus removed for a nutrient. A positive balance means you put on more than the crop took off (a surplus); a negative balance means the crop removed more than you applied (a deficit). The status flag turns that number into a clear surplus, deficit or balanced verdict.

A large surplus wastes money and pollutes — unused nutrients leach to water, run off, or volatilise, and you have paid for fertiliser the crop never used. Persistent surpluses build up in soil and the environment, so trimming them saves cash and protects water quality without hurting yield.

A deficit mines the soil: when the crop removes more than you replace, it draws down the soil's reserves year after year, gradually lowering fertility and future yields. A small, planned drawdown can be fine on a rich soil, but a persistent deficit eventually shows up as falling productivity.

The recovery ratio shows efficiency — it expresses how much of what you applied was taken up by the crop, as removed divided by applied. A higher recovery means less waste; a very low recovery signals over-application or poor uptake. It is a quick read on how well your inputs are converting into crop.

Aim for a small positive balance — enough to maintain soil fertility and cover unavoidable losses, without the waste and pollution of a big surplus. The exact target depends on soil test levels, crop and goals, but a modest, slightly positive balance is generally the efficient, sustainable zone.

Yes — count all the nutrients you apply, including fertiliser, manure and other organic inputs, against everything the crop removes in grain, fodder or whatever leaves the field. Leaving manure out understates inputs and can push you into an unnecessary, costly extra fertiliser dose.

A soil test measures the stock of nutrients in the ground at a point in time; a nutrient balance tracks the flow in and out over a season. They complement each other — the balance explains why a soil test is rising or falling, and together they guide whether to push, hold or ease back on inputs.

They are solid planning figures. Real balances depend on accurate input amounts, crop removal rates and yields, and they ignore losses and soil supply, so treat the result as a clear directional guide — surplus, deficit or balanced — rather than an exact nutrient audit.