8/13/2019 Phosphorus Strategies

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PHOSPHORUS (P) STRATEGIES TO MAXIMISEUPTAKE AND YIELD

APPLYING P CLOSE TO THE SEED MAXIMISES UPTAKE

P does not move very far through the soil.

. Plants access P by growing roots through the fertiliser.

Fertiliser P needs to be placed close to the seed to maximise uptake.

P placement is even more important in soils with

hostile subsoils e.g. Mallee Sodosol

Placing fertiliser close to the seed improves early root establishment, allowing theplant better access to soil P and moisture later in the season.

APPLYING P CLOSE TO THE SEED MAXIMISES UPTAKE

P does not move very far through the soil.

. Plants access P by growing roots through the fertiliser.

Fertiliser P needs to be placed close to the seed to maximise uptake.

P placement is even more important in soils with

hostile subsoils e.g. Mallee Sodosol

Placing fertiliser close to the seed improves early root establishment, allowing theplant better access to soil P and moisture later in the season.

P UPTAKE INCREASES WITH SOIL MOISTURE

Soil moisture affects P uptake, because it determines the amount of root growth.

When moisture is low, it is more difficult for plants

to grow a root system that can access P in the soil.

Some starter P is recommended, even when a dry season is expected

P UPTAKE INCREASES WITH SOIL MOISTURE

Soil moisture affects P uptake, because it determines the amount of root growth.

When moisture is low, it is more difficult for plants

to grow a root system that can access P in the soil.

Some starter P is recommended, even when a dry season is expected

LIQUID SOURCES OF PHOSPHORUS

Trials using liquid MAP have shown quite positive results.

Compared to granular fertiliser, liquid MAP shows less reaction with the soil andbetter availability to crops.

Liquid P fertiliser is a viable future option

LIQUID SOURCES OF PHOSPHORUS

Trials using liquid MAP have shown quite positive results.

Compared to granular fertiliser, liquid MAP shows less reaction with the soil andbetter availability to crops.

Liquid P fertiliser is a viable future option

INCREASING P UPTAKE TO IMPROVE PROFITABILITY BY $10/HA

Good P management depends on a few simple factors:

Only apply P when crop demand is highest i.e. early in the season.

Apply fertiliser P close to the seed.

Consider using higher rates of P when soil moisture is high and the seasonaloutlook is good.

INCREASING P UPTAKE TO IMPROVE PROFITABILITY BY $10/HA

Good P management depends on a few simple factors:

Only apply P when crop demand is highest i.e. early in the season.

Apply fertiliser P close to the seed.

Consider using higher rates of P when soil moisture is high and the seasonaloutlook is good.

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