Social network and related factors in older people with sensory impairment in the community: Using principal component analysis.

Aim: Older people with sensory impairment are more likely to have smaller and weaker social network due to their reduced ability, which lowers their quality of life. However, there is little research on the social network in older people with sensory impairment, especially the related factors. The aim of the study was to explore the related factors of social network and to provide evidence for the improvement of social network to promote successful aging in older people with sensory impairment.

[Effect of mineral N fertilizer reduction and organic fertilizer substitution on soil biological properties and aggregate characteristics in drip-irrigated cotton field.].

A four year field study was conducted to determine how soil biological properties and soil aggregate stability changed when organic fertilizer and biofertilizer were used to reduce chemical fertilizer application to a drip irrigated cotton field. The study consisted of six fertilization treatments: unfertilized (CK); chemical fertilizer (CF, 300 kg N·hm; 90 kg P2O5 · hm, 60 kg K2 O·hm); 80% CF plus 3000 kg·hmorganic fertilizer (80%CF+OF); 60% CF plus 6000 kg·hmorganic fertilizer (60%CF+OF); 80% CF plus 3000 kg·hmbiofertilizer (80%CF+BF); and 60% CF plus 6000 kg·hmbiofertilizer (60%CF+BF). The relationships among soil organic C, soil biological properties, and soil aggregate size distribution were determined.