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Citrus

Citrus production can be divided among four primary groups: sweet oranges, mandarins (also known as tangerines), grapefruit, and lemons and limes. Citrus production takes place throughout the tropical and sub-tropical countries of the world. Orange juice is the largest fruit juice product consumed in the world with important markets for grapefruit and lemon juice.

Special considerations for citrus

Citrus orchards are typically high yielding and need to be supported with high fertiliser inputs, specifically nitrogen fertiliser. Importantly, both under and over fertilising can cause issues with yield and quality, so regularly leaf testing of nutrient levels is common practice.

Each variety will have specific nutrition needs, however in all cases a balanced supply of macro and micronutrients is required to optimise yield, maturation and quality. Citrus trees require well-draining soils and given their nutrient needs soils that hold, cycle, and supply nutrients, as required by the tree. The BioAg citrus program provides a range of phosphorus and potassium fertilisers as well as soil biostimulants that improve nutrient cycling and soil agglomeration (improving drainage), and foliar biostimulants that support plant physiological process during periods of abiotic stress (hot or cold temperatures), and are a natural chelator of micronutrients improving absorption and translocation in the plant.

The BioAg approach

BioAg nutrition programs are incorporated into a growers current nutrition program. Our objective is to make fertiliser and other inputs work better and build and support healthy and balanced soils and plants. Programs are custom-made for each block, using advanced soil and tissue analysis. These integrated programs typically incorporate a range of BioAg solid and liquid nutrients, often associated with conventional inputs. BioAg fertility programs can be developed to meet organic certification requirements.

Soil test

An experienced and Fertcare accredited BioAg agronomist works with you and provides technical expertise on your crop. If you don’t already have recent soil test data, we arrange a soil test for you. The results provide essential information about the soil fertility and soil structure for better performance.

A tailored program

Based on the results of soil tests, crop requirements and other factors such as soil structure, climate, history of the block, and targets that you are trying to achieve, we provide a tailored program that aims to improve soil fertility and maximise yield response. We support you through the program to ensure that inputs are applied at the right time, in the right way.

Leaf and tissue testing

Any nutritional program cannot foresee the changes in weather, disease, or pests, that may impact a crop.  During the season, growers may observe issues or evidence of stress in their crop. This may be due to greater growth or yields than planned, a trace element shortage or abiotic stresses. An on-farm inspection and associated leaf or tissue tests will promptly identify any issues, which can quickly be addressed by applying the appropriate inputs.

High yielding crops require fertile balanced soils

Key to highly productive crops is the function of soils. Soil structure, chemistry and biology are critical in supporting crops throughout the growing season. By improving all aspects of the soil, crops will benefit from improved access to moisture, due to improved infiltration and water holding capacity, improved access to nutrition through improved nutrient cycling, fixation (for N) and a reduction in loss pathways, improved resilience to abiotic stresses and disease, improved root growth providing access to additional moisture and nutrients as well as improved carbon sequestration and a range of other benefits (link to resources - soil health).

Beneficial microorganisms stimulate the plant’s root growth and help protect it from abiotic stresses. This is made possible through mutually beneficial relationships that microbes develop with plants, for example mycorrhizal associations.   BioAg products programs supply essential macronutrients (N, P, K, S, Ca), trace elements (B, Zn, Cu etc.),  microbial food and metabolites beneficial microorganisms that colonise root systems, improving soil function, plant health and productivity.

Several almonds lay on a flat surface

Citrus– key features of a BioAg program

The following table illustrates the cropping process and potential solutions depending on soil test results and other contributing factors. Call your BioAg Area Manager to discuss your individual needs.

Post harvest
Objective
Support post harvest recovery.
Activity
Enhance nutrient supply from the soil and enhance soil structure by using a soil biostimulant.
BioAg Product
Soil & Seed: 3 – 4L/ha
Post harvest
Objective
Support post harvest recovery.
Activity
Provide additional N and Ca.
BioAg Product
Liquid fertiliser: Dependent on crop needs (28 days after application of Soil & Seed).
Post harvest
Objective
Understand soil nutrient levels.
Activity
Perform soil tests.
BioAg Product
-
Pre flowering
Objective
Build soil nutrition and soil structure.
Activity
Apply fertilisers and ameliorants, final rates dependnent on soil tests and crop needs.
BioAg Product
BioAgPhos: 200 – 400kg/ha as determined by soil analysis.
Pre flowering
Objective
Build soil nutrition and soil structure.
Activity
Apply fertilisers and ameliorants, final rates dependnent on soil tests and crop needs.
BioAg Product
BioAgSoP: 20 – 50kg/ha as determined by soil analysis.
Pre flowering
Objective
Build soil nutrition and soil structure.
Activity
Apply fertilisers and ameliorants, final rates dependnent on soil tests and crop needs.
BioAg Product
Ameliorants as determined by soil analysis.
Pre flowering
Objective
Build soil nutrition and soil structure.
Activity
Apply fertilisers and ameliorants, final rates dependnent on soil tests and crop needs.
BioAg Product
N fertiliser Micronutrients as determined by soil analysis, consider SoA as a source of both N and S.
Pre flowering
Objective
Enhance nutrient retention in soils and delivery to plants.
Activity
Apply a soil biostimulant.
BioAg Product
Soil & Seed: 6 – 10L/ha fertigated.
Early Flowering (2 applications 21 days apart)
Objective
Support flowering and bud set.
Activity
Provide soil nutrient and a soil stimulant to enhance nutrient uptake.Provide soil nutrient and a soil stimulant to enhance nutrient uptake.
BioAg Product
Soil & Seed: 1 – 2L/ha fertigated with liquid fertilisers.
Early Flowering (2 applications 21 days apart)
Objective
Support flowering and bud set.
Activity
Provide essential foliar nutrients in combination with a biostimulant.
BioAg Product
Balance & Grow: 1 – 3L/ha foliar application with liquid fertilisers.
Fruit size 20mm (2 applications 21 days apart)
Objective
Support flowering and bud set.
Activity
Provide soil nutrient and a soil stimulant to enhance nutrient uptake.
BioAg Product
Soil & Seed: 1 – 2L/ha fertigated with liquid fertilisers.
Fruit size 20mm (2 applications 21 days apart)
Objective
Support flowering and bud set.
Activity
Provide essential foliar nutrients in combination with a biostimulant.
BioAg Product
Balance & Grow: 1 – 3L/ha foliar application with liquid fertilisers.
Fruit size 50mm (2 applications 21 days apart)
Objective
Support flowering and bud set.
Activity
Provide soil nutrient and a soil stimulant to enhance nutrient uptake.
BioAg Product
Soil & Seed: 1 – 2L/ha fertigated with liquid fertilisers.
Fruit size 50mm (2 applications 21 days apart)
Objective
Support flowering and bud set.
Activity
Provide essential foliar nutrients in combination with a biostimulant.
BioAg Product
Balance & Grow: 1L/ha foliar application with liquid fertilisers.
Fruit size 50mm (2 applications 21 days apart)
Objective
Support flowering and bud set.
Activity
Provide essential foliar nutrients in combination with a biostimulant.
BioAg Product
Fruit & Balance: 1 – 3L/ha
Maturation
Objective
Support nutrient uptake and and sugar development (Brix).
Activity
Apply foliar and soil biostimulant to support nutrient uptake and translocation with the crop.
BioAg Product
Fruit & Balance: 2 – 3L/ha foliar application.
Maturation
Objective
Activity
BioAg Product
Soil & Seed: 1 – 2L/ha fertigated.

Citrus resources

  • Soil carbon

    Like most elements carbon can be present in soils in different forms. Carbon is present as organic or inorganic carbon. Inorganic carbon is mineral based with its most common form being calcium carbonate. The carbon present in soil organic matter is referred to as organ...

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  • Leaf and tissue testing

    Your BioAg Area Manager may recommend a leaf or tissue test in addition to a soil test. In some cases, your BioAg Area Manager will do the leaf or tissue testing with you or for you. Use this procedure if you are doing the sampling without a BioAg expert present.

    Read more
  • Regenerative agriculture

    The term regenerative agriculture has become aligned, or associated hand in hand, with the improvement of soils, improved soil fertility, and the benefits this provides to farms and rural communities. The approach typically promoted is a holistic one, taking into accoun...

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  • The importance of soil carbon

    Carbon is the main element present in soil organic matter, on average making up 58% by weight. The carbon present in soil organic matter is referred to as organic carbon. Soil organic carbon is a vital component of productive agriculture. In addition sequestration of ca...

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Recommended products

bag of BioAg Phos solid fertiliser

BioAgPhos

Solid Fertiliser

Highly reactive phosphate fertiliser made from high-grade reactive phosphate rock combined with BioAg’s microbial digesting agent.

BioAg Biostimulant product Soil & Seed

Soil & Seed

Biostimulant

Formulated to improve soil microbial activity, natural soil fertility and moisture and nutrient utilisation.

BioAg Biostimulant product Balance & Grow

Balance & Grow

Biostimulant

Formulated to increase vegetative growth, root development and soil microbial activity. Ideal for broadacre, pastures and horticulture.

BioAg Biostimulant product Fruit & Balance

Fruit & Balance

Biostimulant

Formulated to increase flowering, fruit set and soil microbial activity. Fruit & Balance enhances the nutritional value and quality of fruit or grain by increasing plant sugar levels.

BioAg product shot of BioAg SoP

BioAgSoP

Solid Fertiliser

Organically certified granular form of fertiliser containing potassium and sulphur. Immediately available to crops and plants. Ideal for crops with a high potassium demand and sensitive to chloride.

bag of BioAg Phos solid fertiliser

Committed to organics

With a core range of natural fertilisers and biostimulants, BioAg can offer an extensive range of products certified by Australian Organics, suitable for use in organic systems.