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Biologically active solid nutrients, fermented liquid cultures from BioAg

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article image Neil and Gina Wiseman with organic pumpkins grown on their irrigated farm at Coleambally, NSW.

Former rice growers, Neill and Gina Wiseman, have transformed a block of worn-out station country into a thriving large-scale organic vegetable farm by using biological farming techniques.

Neill and Gina Wiseman and their sons, Ryan and Luke, are now earning tasty premiums from the sale of organic onions, pumpkins, soybeans and linseed grown on their 400 hectare property at Coleambally in the Riverina.

They have also grown small areas of spelt wheat, rockmelon and watermelon and this year they are planting trial crops of broccoli, lentils and chickpeas.

The current state of affairs is a remarkable about-face for the Wisemans, who ran a technically-sound conventional rice and grain enterprise for many years.

By anyone’s standards, they were doing a good job, a fact underscored by their win in a regional irrigated farm competition in 1996.

They have developed and implemented a whole-farm plan, laser-graded their fields, installed a water recycling system, stopped burning crop stubble and switched from rice to less thirsty crops such as soybeans, maize, wheat and barley.

“But to pay for it, we were really pushing the system,” Neill Wiseman said. “Because it was easy to irrigate, we were growing two crops a year. We would just harvest one and stick the next one straight in.

“The wheels began to fall off because we had to use such high rates of fertiliser needed to keep that regime going in our fragile soils. Our last conventional corn crop had such bad rhizoctonia that its root system was almost non-existent.

“Most of it blew over in a windstorm and we couldn’t harvest the rest because the header would just pull the plants out of the ground.

“Ironically, we were told we needed to put more fertiliser on even though it wasn’t economic as it was. Things were so bad we were about to sell up.”

It was then that they met biological farming experts, Jep Gates and Ivan Mitchell, who convinced them that the massive doses of fertiliser and crop protection products being applied in the name of good management were actually killing the soil biology.

“We had talked to a lot of people, but these two guys made sense,” Neill Wiseman said.

Jep Gates is a co-founder of BioAg , an innovative Narrandera-based company, which manufactures a range of biologically active solid nutrients and fermented liquid cultures that help to produce living, healthy and balanced soils for optimum plant and livestock productivity.

In 1998 the Wisemans started applying BioAgPhos, lime and sulphate of ammonia with a belt spreader and converted two fields to organic agriculture.

BioAgPhos is a reactive phosphate rock that has been treated with a proprietary microbial culture. About half of its 14% 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 also unlocks phosphate, calcium and sulphur already in the soil, leading to long-term benefits in soil structure and fertility.

“We grew three green manure crops in a row in one among the fields and the change in the soil was so dramatic that we went totally organic within the next 18 months,” Neill Wiseman said.

“Since then our clay soil has changed from being like concrete to lovely, friable garden soil that’s full of earthworms. We get much better water efficiency and can go longer between watering.

“Our labour costs are higher because we do a lot of hand-weeding but we buy heaps less fertiliser than we used to because we’re producing crops that don’t have to be rescued.

“Our plants are much healthier, so they don’t attract insect pests. Last year we had insect damage only on stressed plants that didn’t get enough water. This year we grew 130 ha of soybeans with no insect damage at all.

“Because we don’t use insecticides, we have plenty of beneficial predatory insects like ladybirds and little wasps that knock out heliothis grubs.”

Neill Wiseman conceded that weeds were still a problem, particularly along irrigation channels. Regardless, they opt to use non-chemical control strategies, including mechanical methods and hand-weeding and grazing.

The Wisemans now implement an annual fertility programme incorporating a range of BioAg products, all of which are accredited organic inputs, in conjunction with conventional inputs.

About 150–200kg/ha of BioAgPhos and 250–500kg/ha of lime are applied using a belt-spreader each year. The programme also includes the use of a number of fermented liquid cultures, which deliver essential nutrients and metabolites directly to the crop, as well as stimulating microbial activity in the soil.

These include the liquid soil biology nutrient and seed inoculant, BioAg Soil & Seed, which is added to irrigation water at the rate of 2–3 litres/ha before planting and at 1L/ha as needed during the growing season.

Likewise, the foliar treatments, BioAg Balance & Grow and BioAg Fruit & Balance are applied at 2L/ha using a boom spray at various stages during the growing season.

The Wisemans grow a green manure crop of faba beans, vetch, lupins, lab lab or cow peas before each vegetable crop. “Green manuring is expensive but you need to do it if you want to get top yields in the following cash crop,” Neill Wiseman said.

Their soybeans are sold to processors, such as Vitasoy, while their onions and other vegetables go to wholesale markets across Australia. Some onions finish up in organic hamburger patties for export to the U.S.

Neill and Gina Wiseman believe their farm is living proof that large-scale biological or organic farms can be commercially successful.

Indeed, in stark contrast to many of the family farms around them, their operation supports six full-time employees and a small army of casuals.

“We aim to market top quality produce under the organic banner and I believe we can do that under the BioAg programme because we’re addressing nutrition in a scientific manner,” Neill Wiseman said.

“Our ultimate goal is to grow enough product to sell on the conventional market and have people buy it because it looks better and tastes better, not just because it’s organic.

“We’ve had lots of comments on the flavour of our pumpkins and onions, and the first lot of organic onions we sent to market were queried because they looked exactly like conventional onions.”

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