机译:连续种植26年对土壤酶活性和有机质组成的影响。
Texas A&M AgriLife Research Center at Beaumont, Beaumont, TX 77713 USA;
University of Florida, Indian River Research & Education Center, Ft.Pierce, FL 34945 USA;
University of Florida, Soil & Water Science Dept., Gainesville, FL 32611 USA;
Southwest University, College of Resources and Environment, Chongqing China;
Texas A&M University, Agricultural Research and Extension Center, Corpus Christi, TX 78406 USA;