机译:肥料的历史和氮肥的影响对甜菜生产在美国西北部
USDA-ARS Northwest Soils and Irrigation Research Lab., Kimberly, ID;
Beet; Research Design; fertilizer ratesManure;
机译:Effects of cattle manure compost combined with chemical fertilizer on topsoil organic matter, bulk density and earthworm activity in a wheat-maize rotation system in Eastern China