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In order to reveal
the regulating capacity of organic fertilizers on sandy soil, pots
experiments were carried out. The growth of
tomatoes planted on sandy soil amended by organic fertilizers was measured.
Organic fertilizers can be helpful to improve the plant height, stem
diameter, the aerial parts fresh weight, root fresh weight, leaf photosynthetic
rates and photosynthesis, and lay a good foundation for the growth of tomatoes. The effect of organic
fertilizer is the most significant. Among all the treatments of adding
2.5%, 5%, 10% organic fertilizers, adding 10% organic fertilizers are the best.
It can significantly enhance the growth and photosynthesis of tomatoes, and
it is among the best of these three soil treatments for sandy soil.
The paper studies the correlations
between FDI in services and manufacturing efficiencies in host countries. First
a theoretical analysis is presented on the direct and indirect channels through
which FDI in services enhances manufacturing efficiencies in host countries.
Then the forward linkages and backward linkages between FDI in services and
manufacturing sector in host countries are tested empirically using China’s
industrial panel data. We find that FDI in services has positive forward and backward linkage
effects on China’s
manufacturing sector, with forward linkages stronger than backward linkages,
and the wholesale, retail, trade and restaurant sector has the strongest