High-density Farming Diversifies Crops and Boosts Farmers Dec 31, 2019 · He expects to see a further rise in his income in the next two years. “It has been three years since I began high-density farming with NHLP help and in two more years, my [annual] income will quadruple to 250,000–300,000 afghanis (about $3,300–3,900)*,” he says.