Sentence:  During this season of distress, the discouragements to marriage, and the difficulty of rearing a family are so great that population is at a stand. In the mean time the cheapness of labour, the <WSD>plenty</WSD> of labourers, and the necessity of an increased industry amongst them, encourage cultivators to employ more labour upon their land, to turn up fresh soil, and to manure and improve more completely what is already in tillage 
Meaning of the word marked with <WSD> tags:  A more-than-adequate amount.