Change characteristic of fertilization and maize yield on black soil in the Northeast China
gao jing1; ma chang-bao 2; xu ming-gang1; xu zhi-qiang3; zhang shu-xiang1; sun nan1(1.key laboratory of crop nutrient and fertilization; ministry of agriculture; institute of agriculture resource and regional planning; caas; beijing 100081; 2.the national agro-tech extension and service centre; ministry of agriculture; beijing 100026; 3.liaoning soil and fertilizer station; shenyang 110034)
..............page:28-31,56
Effect of C/N on humus in composting
ma huai-liang1; 2; xu xiu-hong1(1.resources and environment college; northeast agricultural university; harbin 150030; 2.life science department; mudanjiang normal college; mudanjiang 157012)
..............page:64-66,73
Effect on the crops growth of biuret concentrations in the compound fertilizer
ping quan-rui1; zou feng-zhu2; huang wei-yi1[1.college of life science; nanjing agricultural university; key laboratory of microbiological engineering of agricultural environment; ministry of agriculture; jiangsu nanjing 210095; 2.testing center for quality safety of farm produce; ministry of agriculture(nanjing); jiangsu nanjing 210036]
..............page:41-46
Change and difference of soil nutrients for various regions in China
ren yi1; zhang shu-xiang2; mu lan3; tian you-guo1; lu chang-ai2(1.the center of extending and service of agricultural technique in china; beijing 100026; 2.key laboratory of crop nutrient and fertilization; ministry of agriculture; institute of agriculture resource and regional planning; caas; beijing 100081; 3.henan soil and fertilizer station; zhengzhou 450000)
..............page:13-17
The research progress on soil organic carbon
ren jun1; 2; guo jin-rui2; bian xiu-zhi2; yan xiao-gong2; liu zhao-jian2; wu jing-gui1(1.jilin agricultural university; jilin changchun 130118; 2.jilin academy of agricultural sciences; jilin changchun 130124)
..............page:1-7,27