Soil Testing & Leaf Nutrition Testing in Australia

With increasing fertiliser costs, soil degradation challenges, and growing pressure to improve sustainability, accurate soil and plant testing has become more important than ever for Australian growers.

Modern farming relies on data-driven decision-making to maximise productivity while controlling input costs. Soil testing and leaf nutrition testing provide valuable insights into soil fertility, crop nutrition, and plant health, helping growers make informed fertiliser management decisions and improve long-term farm performance.

Without reliable testing, fertiliser programs are often based on assumptions rather than measured soil conditions and actual plant uptake. This may lead to imbalances, reduced fertiliser efficiency, unnecessary expenditure, and inconsistent crop outcomes.

Comprehensive soil testing provides critical information about soil fertility, mineral availability, pH, salinity, organic matter, and overall soil chemistry. These factors directly influence crop growth, root development, and fertiliser performance.

Soil pH is particularly important. When pH levels fall outside optimal ranges, plants may struggle to access essential minerals, even when they are present in the soil. Soil testing helps identify these limitations and determine whether corrective actions such as liming are required.

Understanding soil conditions can help growers:

• Improve fertiliser efficiency
• Reduce unnecessary fertiliser applications
• Improve yield consistency
• Better manage seasonal variability
• Support long-term soil health

ALTSA provides a comprehensive assessment through multiple-extraction soil chemistry analysis.

While many laboratories offer only a single extraction method, ALTSA provides a broader evaluation of soil fertility by measuring:

• Macronutrients
• Readily available mineral levels
• Available mineral levels
• Total mineral reserves

This enables growers to better understand organic matter, if required:

• Elements immediately available during rainfall or irrigation
• Elements that will gradually become available over time
• Significant reserves currently inaccessible to crops

This comprehensive approach supports more effective fertiliser management and long-term productivity planning.

While soil testing measures what is available within the soil profile, leaf tissue analysis shows what the plant is actually absorbing.

This makes leaf nutrition testing an essential companion to soil testing.

Leaf analysis can identify hidden deficiencies before visual symptoms appear. Even when minerals are present in the soil, factors such as moisture stress, pH imbalance, compaction, or antagonistic interactions may limit uptake by the plant.

Excessive levels of certain elements can also create nutrient antagonism, where an overabundance of one mineral inhibits the uptake of another, even when sufficient levels are present. This may lead to secondary deficiencies, reduced plant health, and lower crop performance.

Combining soil testing and leaf tissue analysis provides a more complete picture of crop nutrition:

• Soil testing identifies mineral supply
• Leaf analysis confirms plant uptake

Together, these analyses support more precise fertiliser management decisions and improved crop outcomes.

Soil microbiology is becoming increasingly important in modern farming systems.

Microbial populations influence nutrient cycling, organic matter breakdown, soil structure, and overall plant health. Understanding these biological processes provides valuable insight into how soils function and how nutrients become available to crops.

ALTSA’s soil microbiology testing capabilities enable the identification and quantification of microbial species present within agricultural soils.

Managing soil microbiology effectively may help:

• Improve fertiliser efficiency
• Unlock existing mineral reserves
• Improve soil health and resilience
• Reduce reliance on external inputs
• Support long-term sustainability outcomes

These naturally occurring reserves can represent significant value to growers when effectively utilised.

Timely laboratory results are essential for making effective agronomic decisions.

The Australian agricultural laboratory sector has undergone significant consolidation in recent years, increasing pressure on turnaround times across the industry. During critical planting and growing periods, delayed results can affect fertiliser timing, crop management decisions, and operational efficiency.

ALTSA provides responsive laboratory support with a standard turnaround time of approximately five working days, helping growers and agronomists make informed decisions when they matter most.

ALTSA offers one of Australia's most comprehensive agricultural laboratory service portfolios.

Services include:

• Soil nutrient analysis
• Leaf nutrition testing
• Plant tissue analysis
• Soil microbiology testing
• Pathogen testing
• Pesticide Residue (MRL) testing
• Heavy metals testing
• Environmental contamination testing
• Non-Structural Carbohydrate (NSC) analysis
• Mould toxin analysis
• Pollen viability and germination ability
• Bud dissection assessment

This integrated approach provides growers, agronomists, consultants, and agricultural businesses with convenient access to multiple testing services through a single laboratory partner.

ALTSA has achieved NATA accreditation for soil and plant nutrition testing, providing confidence that laboratory systems, methodologies, and reporting procedures meet recognised national quality standards.

This accreditation demonstrates ALTSA's commitment to delivering accurate, reliable, and defensible analytical results.