Tiyeni is a Malawian NGO with a UK funding arm. We show farmers how to improve their crop yields, using an extremely low-cost, low-technology set of methods that we have pioneered. Our results have been spectacular - typically doubling and often tripling crop yields from one harvest to the next. These results are sustained and even improved over time as we build healthy soils. We do not rely on incentives and inputs to promote adoption of our methods: instead, we respond to demand for our farming technology. Word is spreading so fast that we cannot keep up with demand from farmers for training. Tiyeni means "Let's Go!" in Chichewa, Malawi's most widely spoken language.