Green Options

Like this post? Subscribe to our RSS feed and stay up to date.

Call me crazy, call me crude, but I have to say that there is nothing quite like the smell of cow manure.

That scent is so rich, so savory, so earthy, so pungently sweet that just one whiff seems to bury you in an olfactory pleasure dome. And if you keep basking in the aroma, you may well feel driven to grab a pitchfork, plop a straw hat on your head, stick a blade of grass in your mouth, and head on out to the fields. This is especially true on those oh-so-humid mornings in the peak of summer, when the air is so moist and dense that you almost have to put on scuba gear. But any old day is a great day for cow poop.

I confess that I am no connoisseur of creaturely caca, but I would bet that none can compare with the quality of a cow’s. Horse manure comes close, but it pushes pungency at the expense of sweetness, plus it is not very good for fertilizer. The feces of fowls is not even in the same league; it is far too acrid, not to mention slimy and sticky and all around offensive. Elephant excrement is similarly versatile (for example, it makes a great alternative source for paper), yet so far it lacks the time-tested dependability and widespread availability of cow dung; pachyderm pooh is thus still an exotic delicacy rather than a common staple. (I cannot speak to its odoriferous character, alas.) And nobody would sing paeans to dog and cat poop. Look at how tenderly people carry those telltale plastic bags when walking their dogs–usually with one arm extended as the dog pulls the leash and the other arm, hand, and pinching fingers extended as far away as possible with the bag bobbing in the air. When it comes to the felines, we have managed to train them to go potty in specified places, cover it with “fresh scent” granules, and graciously shake off anything sticking to their paws. I suppose “domestication,” in part, means proper toilet training…or “house training,” as it is called. And as for “humanure”…I am not even going there.

You know that times are changing when farmers look to manure as a valuable commodity. Pretty soon, manure from a herd may be more profitable than the beef itself. Manufactured fertilizers has tripled in price in the last year, driving farmers to look for alternatives. This is certainly an indicator of a shifting economy.

1. Energy Prices

Fertilizers are a very energy intensive product. Nitrogen fertilizers are commonly made from petroleum or natural gas. The potash and phosphates in the fertilizers are derived from mining, which also requires a lot of energy. Finally, the finished product needs to be transported and we know all about high gas prices.

2. Fertilizer Demand in China and India

China and India have increasingly been depending on fertilizer, causing a spike in demand. The price of fertilizer has climbed to $750 a ton.

Editor’s note: The Santa Fe Women’s Group in Costa Rica is empowering themselves by making biogas from manure. Written by guest author Thomas Carmona.

As if cooking, cleaning, and child-rearing were not enough, the women of Santa Fe also lead a powerful organization, the Santa Fe Women’s Group, which fulfills many vital roles for the community. One of the group’s biggest projects has been producing biogas.

The Project

The Santa Fe Biogas project, in its initial stages, was simply a concern communicated in Women’s Group meetings: “How can we avoid buying expensive tanks of gas and inhaling smoke in the kitchen?”

When I was a kid on the farm, tiptoeing through a barnyard was a way of life. It was something like playing hopscotch with cow pies. When spring came, it was time to clean out the barn, transfer the winter’s supply of manure, one pitchfork at a time, into a “honey wagon” and take it to the fields to be used as fertilizer. It amazed me how much there was, and until

[...]