Compared with traditional functions, both the composite fertility model which is based on random distribution functions and the segmented mortality model improved the models 'accuracy.
与传统模型相比，本文所提出的基于随机分布函数的生育率组合模型和死亡率分段模型使模型精度得到了进一步的提高。
The origin, distribution, variety characters, production trait, fertility, utilization, adaptability, disease resistance, and feeding conditions of Boer goat were introduced.
详细介绍了波尔山羊的起源、分布、品种特性、生长发育、生产性能、繁殖性能、利用途径、适应性、抗病力及饲养条件等。
It is important to research on the distribution rule of the regional soil carbon pool for the study of global change, soil fertility and ecosystem function appraisal.
研究区域土壤碳库的分布特征对于全球变化研究、土壤肥力和生态系统的功能评价具有重要意义。
Pollen fertility was observed in two successive selfing generations on a two-line sterility line, Zao S, which proved that the pollen fertility in the population showed a normal distribution.
通过早S连续两个世代花粉染黑率的观测，证实群体育性呈正态分布。
Determined by expert system, the comprehensive evaluation indexes to evaluate the fertility of purple soils were proposed, scaled, and the weight distribution of the indexes was established.
采用专家系统建立了土壤肥力综合评判体系，应用模糊综合评判方法对不同土体的肥力进行了综合评判。
Studied the soil fertility on south slope in Qinling Mountains, the spatial distribution and variation pattern and its relation with altitude.
对秦岭南坡土壤肥力状况、空间分异规律及其与海拔的关系进行研究。
Soil particle size distribution is one of the key physical factors regulating soil fertility.
土壤颗粒组成是影响土壤肥力的主要物理性质之一。
Soil particle size distribution is one of the key physical factors regulating soil fertility.
土壤颗粒组成是影响土壤肥力的主要物理性质之一。
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