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BioAg’s soil nutrients enhances natural recovery of crops

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article image Charlie and Andrew Watts of Pinevale, Manildra, NSW

The adoption of a biological soil nutrient programme six years ago has improved the productivity and general well-being of a mixed farming enterprise operated by the Watts family in Central West NSW.

Charlie and Jenny Watts, together with their son and daughter-in-law, Andrew and Tina Watts, run 1,100 first-cross ewes and 40 Angus x Santa Gertrudis crossbred cows, as well as growing up to 200 hectares of winter cereals and oilseeds on their 890ha Manildra-district property, Pinevale.

According to Charlie Watts, the enterprise faced a major crossroads about a decade ago. Their wool enterprise was becoming unviable, yet increased emphasis on cropping seemed unfeasible due to a number of soil and weed problems.

The crunch came when they lost a cow and calf to magnesium deficiency, even after implementing a conventional fertiliser programme to correct this problem.

“That really made us start thinking – we knew there was something wrong somewhere,” Charlie Watts said.

They had only to look over the boundary fence to see the contrast between the health of their crops and pastures and those grown by their neighbours, Andrew and Rhonda Watt, who were the local agents for a biological nutrients company, BioAg .

BioAg markets a range of biologically active solid nutrients and fermented liquid cultures designed to produce living, healthy soils as the basis for optimum plant and livestock production.

BioAgPhos, one among the key products from BioAg, is a reactive phosphate rock that has been treated with a proprietary microbial culture.

About half of the 15% phosphorus content is available immediately for plant use, while the remainder is slowly digested by the micro-organisms and added to the nutrient reservoir in the soil.

The improved soil microbial activity is also claimed to help unlock phosphorus, calcium and sulphur already in the soil, leading to long-term benefits in soil structure and fertility.

BioAg also markets a range of fermented liquid cultures, which deliver essential nutrients and metabolites directly to pastures and crops, as well as stimulating microbial activity in the soil.

Charlie Watts decided to investigate further and invited Andrew Watt to carry out soil tests and tailor-make a soil fertility programme for the Pinevale cropping programme in 1999.

In a typical year, they plant about 40ha of canola, 40ha of grazing wheat, 80ha of grazing triticale and up to 40ha of lupins.

After a two or three year cropping phase, the paddocks are sown to phalaris, ryegrass and clover-based pastures.

Each cropping paddock now receives 125kg/ha of BioAgPhos, 270kg/ha of lime, 120kg/ha of sulphate of ammonia and 5.5kg/ha of magnesium sulphate, as well as smaller amounts of vitamins and other additives, during autumn.

At sowing, each paddock gets 17–30kg/ha of monoammonium phosphate (MAP) and 2–3L/ha of BioAg Soil & Seed, a liquid treatment that encourages rapid germination, root development and soil microbial activity, mixed with either glyphosate or trifluralin to control annual ryegrass and wireweed.

After they have been grazed, the cereals receive 1.5L/ha of BioAg Balance & Grow, a foliar treatment, which stimulates vegetative growth and improves soil microbial activity, mixed with small amounts of urea or calcium nitrate.

Wheat and canola crops also receive 1.6L/ha of BioAg Fruit & Balance, a foliar treatment, which delivers a rich source of nutrients to enhance yield and quality.

This is mixed with 4–6 kg/ha of urea and applied at flowering to the canola crops and after head emergence in the wheat crops.

Charlie Watts said his crops were now yielding higher than the district average, while the wheat averaged 12.6% protein last year. “We get a lot more feed off them and they recover much faster after grazing,” he said.

“Even though we’ve had a run of dry seasons, we are still grazing our dual-purpose crops and reaching our yield targets of about four tonnes per ha. Last year, we grew 100 tonnes of canola that had a 43 percent oil content from a 40 ha paddock that wasn’t sown till the end of June.

“We’re using a lot less fertiliser than before. We’re putting on about 12 kg/ha of urea, whereas before we’d be using 80 kg/ha. At $620 a tonne that’s quite a saving.

“Overall, our crops seem much healthier and we’re feeling a lot happier, more secure and more sustainable. Farming is much more interesting – we’re always looking at other farms and always learning.”

Charlie and Andrew Watts have also noticed a significant improvement in the softness of the property’s red clay to sandy loam soils.

“Our soils make better use of our 600 mm rainfall and they seem to be full of earthworms, which aerate the ground and fertilise it with their castings,” he said.

“The soil is also easier to work with machinery, reducing fuel bills and point wear. The living microbes in the soil create warmth. The soil is warmer, even in winter, seeds germinate quicker and everything stays greener for longer. We’re among the first to plant and last to harvest.”

Completing the biological cycle, stubble is sprayed with BioAg Digest-it, a liquid microbial culture that accelerates the decomposition of crop resides into plant-available nutrients and helps to improve soil microbial activity.

Charlie Watts avoids the use of insecticides or fungicides wherever possible, preferring to let beneficial predatory species, such as lady beetles and spiders, take care of insect pests. “If you spray for redlegged earth mites, you’ll kill the beneficial species as well,” he said.

The Watts family had already been nudged in a biological direction when students from Hawkesbury Agricultural College spread strips of humus made from garden and forestry waste in a paddock. Ten years later, Charlie Watts still takes pleasure in pointing out the improvements the humus made to the soil.

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