China Acknowledges Excessive Fertilizer Use

Years of excessive chemical fertilizer use have reduced the productivity of rice paddies in many parts of Hubei Province, according to a news report from China's official broadcasting service . Mr. Song, a Hubei rice producer who has contracted 1650 mu (272 acres) of land, says yields have been declining and he now plans to leave a lot of his land fallow or plant other crops on his rented fields. Describing a kind of treadmill process, he says his chemical fertilizer application has doubled but yields are about the same as a decade ago. According to the article, this phenomenon of declining yields and land left idle is common all over Hubei Province, one of China's leading rice-producing areas. An agricultural technician explained that the lower yields are due to the compaction of the soil. After many years of applying chemical fertilizer, a 20-cm. layer of fertilizer has built up. Oxygen cannot penetrate below the surface. The soil is difficult to plow, whether using water...