Self-sown grass and organic mulching could modify soil environment,increase the organic matter content and soil microorganism.
研究了自然生草和有机物覆盖对富士苹果园中微生物和土壤有机质含量的影响。
Lead Content in Plants From the Grassland Natural Reserve Area in Wutai Mountain.;
五台山草地自然保护区植物中铅元素含量的初探
A Study on Cobalt Content in Plants of Wutai Mountain;
五台山草地自然保护区植物中钴的含量及分布特征
Thirdly, man-made grassland is being promoted so as to ease the pressure brought to bear on natural grassland by the ever-growing livestock population.
三是建设人工草地，减轻牲畜数量增加对自然草地的压力；
Land in this area is barren and no plant can grow here, because there are natural disasters throughout the entire year.
这个地区因常年自然灾害, 土地瘠瘦, 寸草不生。
Bio-economical.policy study on land-use of Caohai natural reserves;
草海自然保护区土地利用调整之生态经济对策
Research Status of Natural Factors Influencing Soil Respiration of Grassland Ecosystem
影响草地土壤呼吸的主要自然因子研究现状
(2) The amount of the soil evaporation in Eucalyptus wood slope was the highest,followed by the nature grass slope,while it was the lowest in nature slope.
(2)不同地类的土壤蒸发量为桉树林坡面>自然草坡>阶间草坡。
The Restoration of Degraded Ecosytem in Hunshandak Sandland Through Natural Process;
浑善达克退化生态系统恢复研究—自然力在沙地草地恢复中的应用
Soil Erosion Processes on Sloping Grassland in Heaven Lake Nature Reserve of Xinjiang Wei Autonomous Region
新疆天池自然保护区草地坡地土壤侵蚀规律研究
a bird suddenly got up from the grass
草地里突然飞起一只鸟。
Never has my sympathy with Nature down to the stones and blades of grass been fuller and more ardent.
我从来没有更开心更热情地同情大自然，以至于石头和草叶。
Grassland degradation of Tongde County was caused by both natural factors and human factors.
同德县的草地退化是自然因素和人为因素共同综合作用的结果。
Study on Ruderal Community Diversity and Distribution under Different Land Use Type in Suburban of Shanghai
上海郊区不同土地利用类型自然草本群落多样性及其分布研究
Study on Growth Period of Each Type of Grassland and Their Natural Conditions Based on Remote Sensing in Gansu Province
各类型草地生长过程及自然因子特征遥感研究-以甘肃省为例
Changes of Plant Community in Grazing and Restoration Processes in Horqin Sand Land,Inner Mongolia
科尔沁沙质草地植物群落的放牧退化及其自然恢复过程
The Bottleneck and its Resolutions to the Natural Recovery of Black Soil Type Degraded Grassland in the Three River Source Region
三江源区“黑土滩”型退化草地自然恢复的瓶颈及解决途径
Breeding of New Line"Huhe"and Evaluation of Germplasms of Kentucky Bluegrass under Artificial Stresses and Natural Conditions in Shanghai
草地早熟禾新品系“沪禾”的选育和在上海自然条件与人工逆境胁迫下的草坪特性鉴定
The Effect of Climate Factors on the Grass Yield of Natural Pasture
气候因子对天然草地牧草产量的影响
Impacts of Land Use and Climate Change on Cultivated Land Potential Productivity in Farming-Pastoral Zone of North China
干旱化与土地利用变化对中国北方草地与农牧交错带耕地自然生产潜力的综合影响评价
unearned increment
(土地的)自然增价