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The brush-tailed rock-wallaby used to thrive in eastern Australia, enough that during the 1890s alone, 144 000 pelts were exported and 66 000 scalp bounties were paid because the wallabies ...

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Urea is a white crystalline substance with the chemical formula CO(NH2)2. It is highly soluble in water and contains 46.7% nitrogen. Urea, also known as carbamide an organic compound because ...

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Water-repellent, or hydrophobic, soils repel water instead of absorbing it. The water sits on the soil in beads. The reason is organic waxes that result from plant breakdown. The waxes ...

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As they say in Yorkshire, “There’s brass in muck.” It’s possible—and even desirable—to make money out of other people’s waste. For purely economic reasons, it’s often cheaper to reuse waste ...

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Dear Loam Ranger, After the recent heavy rain we've noticed a slick of some orange-coloured slime running across paths and an oily film on the soil surface. Is it harmful? We’ve had ...

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Coffee is made from the seed of a red berry from bushes of the genus Coffea. A typical coffee bush yields about 1 kg of coffee a year. There are ...

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Water and soil salinity are measured by passing an electric current between the two electrodes of a salinity meter in a sample. The electrical conductivity, or EC, of a soil ...

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Interpreting a plant analysis is not easy. Although the association between nutrient uptake and plant growth is well studied, we still don’t have enough data for a number of crops, ...

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