Mla Stocking Rate Calculator

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MLA Stocking Rate & DSE Calculator

Merino Wether (45kg maintenance) – 1.0 DSE Dry Ewe / Ram – 1.5 DSE Ewe with single lamb (to weaning) – 2.5 DSE Ewe with twins (to weaning) – 3.5 DSE Steer / Heifer (weaner 250kg) – 6.0 DSE Growing Steer (400kg) – 8.0 DSE Cow with calf at foot – 14.0 DSE Dry Bull – 12.0 DSE Custom DSE Rating
Total DSE Load: 0
Stocking Rate: 0

Understanding Stocking Rate and DSE

Stocking rate is the most important driver of profitability and sustainability in grazing enterprises. It refers to the number of livestock carried on a specific area of land over a period of time. In Australia, the standard unit of measurement is the Dry Sheep Equivalent (DSE).

A DSE is based on the energy requirements of a 45kg Merino wether maintained at a constant weight. By converting all livestock classes (cattle, goats, different sheep breeds) into DSE units, farmers can accurately compare grazing pressure across different paddocks and seasons.

How to Calculate Stocking Rate

To calculate your current stocking rate, use the following formula:

Total DSE = (Number of Animals) × (DSE Rating per Head)
Stocking Rate (DSE/ha) = Total DSE ÷ Total Hectares

Common DSE Benchmarks

Livestock Category Average DSE Rating
Dry Ewe (50kg) 1.1
Ewe with single lamb 2.5 – 2.8
Weaner Cattle (250kg) 6.0
Cow and Calf (500kg cow) 14.0

Why Monitoring Stocking Rate Matters

  • Pasture Health: Overstocking leads to overgrazing, loss of perennial species, and soil erosion.
  • Animal Performance: High stocking rates can reduce individual animal weight gain due to competition for feed.
  • Risk Management: Knowing your DSE load helps you calculate how many months of feed you have left during a dry spell.
  • Profitability: Optimizing the balance between animal numbers and pasture growth maximizes kilograms of product per hectare.

Example Calculation

If you have 1,000 Merino wethers on a 200-hectare property:

  • Total DSE = 1,000 animals × 1.0 DSE = 1,000 DSE
  • Stocking Rate = 1,000 DSE ÷ 200 ha = 5.0 DSE/ha

If you switch to 100 cows with calves on the same property:

  • Total DSE = 100 animals × 14.0 DSE = 1,400 DSE
  • Stocking Rate = 1,400 DSE ÷ 200 ha = 7.0 DSE/ha
var dseSelect = document.getElementById('dseType'); var customContainer = document.getElementById('customDseContainer'); dseSelect.onchange = function() { if (this.value === 'custom') { customContainer.style.display = 'flex'; } else { customContainer.style.display = 'none'; } }; function calculateStockingRate() { var area = parseFloat(document.getElementById('propertyArea').value); var count = parseFloat(document.getElementById('animalCount').value); var dseSelection = document.getElementById('dseType').value; var dseRating = 0; if (dseSelection === 'custom') { dseRating = parseFloat(document.getElementById('customDseValue').value); } else { dseRating = parseFloat(dseSelection); } if (isNaN(area) || area <= 0 || isNaN(count) || count < 0 || isNaN(dseRating) || dseRating <= 0) { alert("Please enter valid positive numbers for all fields."); return; } var totalDseValue = count * dseRating; var rate = totalDseValue / area; document.getElementById('totalDse').innerText = totalDseValue.toLocaleString(undefined, {maximumFractionDigits: 1}) + " DSE"; document.getElementById('stockingRate').innerText = rate.toFixed(2) + " DSE/ha"; var interp = ""; if (rate = 2 && rate < 10) { interp = "This is a moderate stocking rate, common in many sheep-wheat zones of Australia."; } else { interp = "This is a high stocking rate, suggesting intensive grazing or high-rainfall perennial pasture systems."; } document.getElementById('interpretation').innerText = interp; document.getElementById('mla-results').style.display = 'block'; }

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