渭北高原

陕西省渭北高原冰雹灾害对苹果生产的影响研究

Hail Disaster Impacts on the Apple Production

渭北黄土高原林农复合生态系统立体经营模式效益分析

Benefits Analysis on the Stereoscopic Management Model of Forest-agricultural Complex Ecosystem in the North Loess Plateau of Wei River

渭北黄土高原苹果优质气候层带分析

Climatic belt analysis about the high quality of apple in the north of Weihe River among the Loess Plateau

渭北黄土高原刺槐&元材积表的导算

Derivation of local volume table for Robinia pseudoacacia on the Loess Plateau of the area north of the Wei River

采用随机设计，实地试验的方法，对渭北黄土高原核桃林下土壤水分状况及其变化规律进行了研究。

Based on random design and field experiments , the soil moisture condition and its changing law of walnut forest land were studied .

通过对渭北黄土高原刺槐人工林最大林木的树干解析和年轮分析描述了林分最大两株林木的树高、直径和材积生长过程。

Growth process of height , diameter and volume of the largest two stems of some sampled black locust stands on Weibei-loess plateau were described by analyzing stem disks and growth rings .

本文从开发林业资源的角度，探索黄土高原刺槐蜜源林的蜂蜜生产等基层问题，找出黄土高原刺槐蜂蜜生产的最大潜力，特别是渭北黄土高原地区。以此充分开发林业资源，提高农民收入。

From the development perspective of the forestry resources , the initial exploration of Robinia honey yields in loess plateau has been carried out , and to make recommendations and to raise farmer income .