When should you question a source credibility

when it doesn't sound credible

the answer is a

their confiscation of contraband and the sinking if the lusitania

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.