Geostatistical spatial structure analysis for crop productivity in songnen plain 松嫩平原作物生产力地统计空间格局分析
2.
Simulating the crop productivity at black soil zone of songnen plain supported by gis 支持下的松嫩平原黑土区作物生产力模拟
3.
The agricultural practice in liaoning demonstrated that the productivity of soils low for upland crops seems high productive for lowland rice 辽宁省农业实践表明，对于旱地作物生产力低的土壤对水稻来说生产力较高。
