
Sandy, crumbly, muddy, rocky, red, brown, gray--all these words can be used to describe soil. Some soil is soft and black and smells of wet leaves. By contrast, another kind is dry, orange, and as hard as rock. Inside this book, readers will discover that it's the ingredients...

Sandy, crumbly, muddy, rocky, red, brown, gray--all these words can be used to describe soil. Some soil is soft and black and smells of wet leaves. By contrast, another kind is dry, orange, and as hard as rock. Inside this book, readers will discover that it's the ingredients...