[Q]: [ReadthefullstoryatScienceDaily:]
[A]: [Read the full story at Science Daily:]
[Q]: [Thecropbiomasswasreducedby3%whenthenumberofweedharrowingswasincreasedfromtwotothree,andby6%atanincreasefromtwotofourtimesharrowing.]
[A]: [The crop biomass was reduced by 3% when the number of weed harrowings was increased from two to three, and by 6% at an increase from two to four times harrowing.]
[Q]: [TheColosseum,theForumRomanumandthePantheonremindvisitorsofvividancientRomanlifeandentertainment,anddespiteitscompactsize,theVaticanpacksmoreculturaltreasuresthanmanycities.St.Peter'sBasilicaandtheSistineChapelwithfrescoesbyMichelangeloandbeautifulsculptureswillleavealastingimpression.]
[A]:
[The Colosseum, the Forum Romanum and the Pantheon remind visitors of vivid ancient Roman life and entertainment, and despite its compact size, the Vatican packs more cultural treasures than many cities. St. Peter's Basilica and the Sistine Chapel with frescoes by Michelangelo and beautiful sculptures will leave a lasting impression.]