英语翻译
1.ThefailureoffoliarapplicationsofFetocauselargeincreasesingrainFemightbe
explainedinthreeways..这里的to是指代前面部分的目的?
还有这句是这段文字的第二个原因
.AsecondpossibleexplanationforthelackoflargeincreaseinFeconcentrationingrainisthat.