Don't know about point one but for point two: They got two harvests per year with slightly increased yield per hectare per harvest. > produced grain for eight

Don't know about point one but for point two: They got two harvests per year with slightly increased yield per hectare per harvest. > produced grain for eight consecutive harvests over four years, averaging 6.8 Mg ha−1 harvest−1 versus the 6.7 Mg of replanted annual rice