Many gardeners, particularly those that grow roses, would know about sick soil or replant disease. In essence, if you put a plant into a hole where the same type of plant was previously, often the new plant does not perform well, and can wither and die. However, when you replant from a different family of plants, it does well. So the question is, what causes this?
Delving into the activity of soil microbes in autumn, we find that the biological activity of soil microbes is driven by the same factors that influence plant growth, moisture, temperature and nutrients.
In summer when the soil moisture drops and temperature of soils is high, microbial activity slows down. In your garden, this means the breakdown of organic material and nutrient cycling slows down. The residual effect is a reduction in nutrient availability for your plants.
The Australian Agronomist Magazine Autumn 2020 features an article by Neutrog’s Microbiologist and R&D Manager, Dr. Uwe Stroeher called ‘Nitrogen Fixation in Agriculture by Mutualistic and Free Living Bacteria.’ Uwe discusses the role nitrogen fixation plays within plant tissues of legumes or within the soil itself by free living bacteria, and how bacteria can turn atmospheric nitrogen into a plant-useable form such as ammonia.
The Australian Agronomist Magazine’s Spring 2019 issue features an article from Neutrog’s Microbiologist and R&D Manager, Dr. Uwe Stroeher. Titled ‘The Plant Microbiome’, Uwe discusses soil microbes which can significantly enhance plant health and growth, as well as positively affect crop yield in a world with a growing population and a potentially changing environment, where food security has become a major agricultural challenge.
The Australian Agronomist Magazine Summer 2019 issue features an article by Neutrog’s Microbiologist, Dr. Uwe Stroeher called ‘Carbon Dioxide and Water Use Efficiency.’ Uwe talks about the current economic and climatic conditions which are presenting some never before seen challenges to Australian agriculture, and how carbon dioxide and its availability plays a critical role in water use efficiency in plants.
Unfortunately the current Covid19 situation has resulted in a lack of available vegetable seeds and seedlings, but don’t despair if you still have some seeds from last year or even the year before hidden in the back of your laundry cupboard. In many cases these seeds can still be viable if treated correctly.
Seeds have a date that is essentially a best before date, after which the seed viability drops off markedly. Seeds such as chilli, capsicum and even corn have a short shelf life, but now is not the time to plant these anyway. Unfortunately onion seeds fall into this group as well. Other seeds such as beans, peas and the brassicas are often good for up to 3 years, and others such as lettuce and radish are good for 5 to 6 years.
This week, Neutrog’s Microbiologist and R&D Manager, Dr. Uwe Stroeher talks about soil nutrient cycling, and how you can influence this to benefit your plants. The story of nutrient cycling is very interesting – many people think that in order for lush plant growth in your garden, you need lots and lots of nutrients. This is true to some extent, however in rainforests or tropical areas, in many cases the soil itself is nutrient poor, so the lush growth is due to rapid cycling of those nutrients. When leaves or other organic matter fall in these tropical areas, the insects and microbes quickly get to work in breaking down the material in order to make the nutrients available for the next round of plant growth. It is by the action of bacteria and fungi that the rainforest can support the diversity and vigour, however we can’t all have a rainforest…
I am sure every gardener knows about mulching, but perhaps not everyone is aware of the benefits of a good mulch over a cheaper but less effective one. There are a number of pitfalls people should be aware of. There are three main reasons to mulch – the most obvious is to reduce moisture loss from the soil, the second is to keep the roots cool in summer and warm in winter, and the third is to reduce weeds. Providing you have the right type of material, mulching can also feed your plants, however some mulches are high in carbon but low in nitrogen, which can lead to nitrogen deficiency in your soil. To reduce water loss and to insulate your soil, a mulch that’s not too fine is better, so that when you apply it to your soil it still has some air spaces, which results in an…
Need to know what to feed your plants during Autumn? Our Year-Round Fertilising Programmes have been specifically developed by experts who rely upon optimum plant growth to earn their living. Like humans, plants thrive on regular feeding throughout the year – happy, healthy plants are also more resistant to pests and disease.
The soil is a complex ecosystem, and like all ecosystems there needs to be a balance of organisms, otherwise resources would run out, and one or two types of organisms would dominate. Soil microbiology is much more than bacteria and fungi – it also involves viruses to release nutrients trapped within microbes. Even bacteria and fungi in the soil need to be kept under control, and this is done in a number of ways. The most obvious is when the soil gets very dry, as microbes will often die. Then, there are biological forms of control, for example, some nematodes are designed to feed specifically on bacteria. The mechanism which has arguably the greatest impact on soil bacterial numbers is what we call bactriophages or bacterial viruses. When nutrients are cycled by microbes, some are in a form that the plants can take up immediately, but others become part of…
