( ( When ( operating sprinklers ) ) ( , ( ( ( water ( in ( ( ( the ( early morning ) ) or ) ( late evening ) ) ) ) ( to ( reduce evaporation ) ) ) . ) ) )
(ROOT (S (SBAR (WHADVP (WRB When)) (S (VP (VBG operating) (NP (NNS sprinklers))))) (, ,) (VP (VB water) (PP (IN in) (NP (NP (DT the) (JJ early) (NN morning)) (CC or) (NP (JJ late) (NN evening)))) (S (VP (TO to) (VP (VB reduce) (NP (NN evaporation)))))) (. .)))
When operating sprinklers, water in the early morning or late evening to reduce evaporation.
(ROOT (S (NP (NP (VBG Watering) (NNS plants)) (CC and) (NP (NP (NN grass)) (PP (IN in) (NP (DT the) (JJ early) (NN morning))))) (VP (VBZ is) (NP (DT a) (NN way) (S (VP (TO to) (VP (VB conserve) (NP (NN water)) (SBAR (IN because) (S (NP (NP (JJR smaller) (NNS amounts)) (PP (IN of) (NP (NN water)))) (VP (VB evaporate) (PP (IN in) (NP (DT the) (JJ cool) (NN morning))))))))))) (. .)))
Watering plants and grass in the early morning is a way to conserve water because smaller amounts of water evaporate in the cool morning.