It primarily means "fertilizer". It can mean other things though its not the main term, like payment (as in season ticket/voucher) and compost/manure. If you google the term and then click on images searching both "abono" and "abonos" you will see the pictures are almost 100% about fertilizers, not payment. This is still a commercial term though. If you are after payment you'd be looking for "pago" or "pagos" from the verb "pagar" which means to pay. You can also see this visually by looking at the images for each of those terms.
All in all it is registered in about 20 extensions, and is short, and does have good search, unfortunately competition for the term is low though. In the domainer/reseller market you could probably get about $200ish quick if you wanted to sell it off right now on the forum. Ultimately your target sales price should take into account many things like related sales, traffic and revenue stats, etc.. Names like this can realistically fetch 1-2k, but the specific target price will ultimately be up to you and based on your own research of its value in its market, just make sure you have the right market, which in this case is farming/fertilizers rather than financial. Since we are not end users here, all we can really appraise it for is reseller value on the forum which would be about $200ish in my opinion on the name alone but after taking into account its age, I'd probably say $300ish wouldn't be out of the question. Decent, short name, with fair stats, good luck! How much did you invest?