That just means it is an effective reference point index and accessible unlike say "Look at this $300 Introduction to Agronomy book ISB Number Y to tell you why

That just means it is an effective reference point index and accessible unlike say "Look at this $300 Introduction to Agronomy book ISB Number Y to tell you why what you said about modern agriculture not caring about soil erosion is completely wrong". If someone tells you to Google something it essentially implies that it is already answered and accessible like when asked how to spell a word answering "use a dictionary" means to stop wasting their time essentially.