'I had rights-of-way, fields, cattle in my keeping, Tractors hitched to buckrakes in open sheds, Silos, chill gates, wetslades, the greens and reds, Of outhouse roods.'
'Silos, chill gates, wet slates' - internal rhyme combined with an extensive list.
'tractors','bikerakes','sheds','reds' - Semantic field of nature escape from the semantic field of war/ military = peaceful.