1) Cropland
开垦农田
2) reclamation
开垦
1.
The impact of reclamation activities on soil sulfur contents in the Sanjiang Plain;
开垦利用对三江平原湿地土壤硫含量的影响
2.
Effects of reclamation on soil organic carbon in Haibei alpine meadow;
开垦对海北高寒草甸土壤有机碳的影响
3) Reclaimation
开垦
1.
The changes of water physical characteristics,such as supply,storage,and outlet inmarshland and lowland of Sanjiang Plain before and after reclaimation have been studiedcomparatively on the basis of in situ data and test data.
根据点面调查资料和试验成果等，对黑龙江省三江平原沼泽湿地开垦前后水文物理性质──下垫面的供水、蓄水和泄水特性的变化进行了研究。
4) tillage
开垦
1.
Effect of Tillage on the Distribution of Black Soil Organic Carbon in Organic-mineral Complex;
开垦对黑土有机碳在有机无机复合体分配的影响
2.
67 mg·kg-1 after 3-year tillage (G3), and the labile and secondary available Pi increased in a wider range (P<0.
为了探讨开垦对三江平原湿地土壤磷(P)形态含量及组成的影响,采用Hedley分级方法对比分析湿地开垦前后及垦后弃耕土壤不同形态P含量变化。
5) cultivation
开垦
1.
Effects of Cultivation on Soil Organic Carbon Dynamics in Agroecosystems;
开垦对农业生态系统土壤有机碳动态变化的影响
2.
Effects of Cultivation on Soil Properties at a Desert Site;
开垦对荒漠土壤性状的影响
3.
We aimed to detect the process that human activities exert on ecosystem by investigating and analyzing the changes of plant community,especially underground soil and root carbon sequestration under long term cultivation and grazing in typical steppe area of Nei Monggol,North China.
以围封26 a草地(E26)为对照,研究了内蒙古典型草原区长期开垦与放牧对土壤-植物根系系统碳截存的影响。
6) farmland reclamation
耕地开垦
1.
Tradeoff of conflict between wetland protection and farmland reclamation in the Sanjiang Plain,Heilongjiang Province;
三江平原湿地保护与耕地开垦冲突权衡
参考词条
补充资料：被开垦的处女地
被开垦的处女地
一九三○年，苏维埃全国开展农业集体化运动。达维多夫奉命来到顿河地区，组织那里的农民建立集体农庄。在与旧势力的反复斗争中，格列妙奇村的集体农庄终于冲破重重困难和阻碍，逐步得到了稳固和发展，使原本贫苦的农民在被开垦的处女地上建设起自己的新家园。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。