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Report Card On Sustainable Natural Resource Use In Agriculture, Robert Summers, David Weaver
Report Card On Sustainable Natural Resource Use In Agriculture, Robert Summers, David Weaver
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Condition and trend Nutrients, such as phosphorus (P), are essential for profitable agriculture in the south-west of WA; however, excess P – more than is required for optimal production – is stored in many agricultural soils. On average, pasture soils and arable soils contain 1.3 times and 1.6 times respectively, as much P as is required for optimal production. Production in P-enriched soils is more likely to be constrained by soil acidity (50–60% of pasture and arable soils), potassium (K) (50% of pasture soils and less than 10% of arable soils), and sulphur (S) (30% of pasture soils). Management implications …
Current Status And 25 Year Trends For Soil Acidity, Fertility And Salinity In The Coastal Catchments Of The Peel-Harvey, Robert Summers, David Weaver
Current Status And 25 Year Trends For Soil Acidity, Fertility And Salinity In The Coastal Catchments Of The Peel-Harvey, Robert Summers, David Weaver
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The current status and trends of soil analyses in the coastal catchment of the Peel Harvey estuary were developed from historical soil data (1982 to 1991) combined with a renewed sampling to greater depth (1 m). This report encompasses the data collected from the first year of the project. Soil phosphorus content was found to be high but has dropped slightly since 1991. Soil pH is very low and is likely to be limiting production but have risen slightly since 1991. Soil potassium content is generally so low that it may be limiting production especially to the west of the …