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This answer expands on the answer in the last post: How can so me soil be older than other soil? Soil scientists describe soil as a natural body that forms as the result of five factors:Climate, Organisms (plants, animals, and...
Question: I just read something that said Africa south of the Sahara has some of the “oldest soils in the world.” But I thought all Earth’s land was once one big continent. So, how can some soil be older...

WHAT IS COMPOST?

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Most gardeners and farmers know compost to be a rich, organic soil amendment, which can be used to improve soil tilth and supply plant nutrients. The term compost is also a verb for a rapid way to decompose and...

Worsening nutrition deficit

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A CONFERENCE in Lahore last week highlighted some worrying aspects of the nutritional scenario among the country’s population and bemoaned how every suggested remedy is being consigned to the dustbin of policymaking. This is despite the fact that the nutritional...
“Macro” and “micro” nutrient fertilizers refer to the quantity of nutrient needed by plants, not to theirimportance to plant growth. The following statements define the categories more specifically: Macronutrients are divided into two classes: primary and secondary. The three primary...
There are highly specialized and exceedingly rare plants that are able to grow on metal-contaminated sites by taking the contaminants up into plant tissues. They are referred to as hyperaccumulator plants. One hyperaccumulating tree species, identified in the South Pacific,...
There are several factors to address with your question. The first is that we are expecting to continue to feed the world on less land each year. As we continue to build towns and cities on former farm land,...
Healthy humans indeed need healthy soils! Healthy soils grow healthy, nutrient-rich foods. The calcium in your broccoli comes directly from soil. Wheat kernels contain protein that the wheat plant made with nitrogen present in soils. If the soil is deficient...
Question: I keep hearing the terms “healthy soil” and “soil health.” What does it mean for a soil to be healthy? Does it just mean the soil is free from pollutants? Answer: Soil health is a difficult concept to describe...
There are many different types of animals that live in the soil. Soil is a living, dynamic resource. It helps grow food, fiber, and fuel. However, none of these processes can truly be carried out without the help of...

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