Soil has the following properties: clay content: 20% ca saturation: 25% cec meq/100g: 18 mg saturation: 3% ph: 4.8 k saturation: 1% a lab recommended 5 tons/a of a 70% lime material. estimate the final ph of the soil (afs) if all of this material were added: what was the initial and final acid saturation in this soil if only 3 tons lime material/a were added?

Needed fast 15 points the process of natural selection favors certain characteristics in organisms, while it selects against other characteristics. what would happen if there was zero variation between all of the organisms on earth? a. organisms would evolve to increase variety b. natural selection would operate faster c. less food would be available d. evolution through natural selection would not occur

What type of government does costa rica have?

Which factors add to the greenhouse effect and are caused by human activities?