Hasil untuk "Agriculture"

J. Werther, M. Saenger, Ernst-Ulrich Hartge et al.

L. T. Angenent, K. Karim, M. Al-Dahhan et al.

V. Panse, P. V. Sukhatme

J. Sims, R. R. Simard, B. Joern

B. A. Kimbal, Jianguo Zhu, Lei Cheng et al.

D. Asami, Yun‐Jeong Hong, D. Barrett et al.

M. Rosenzweig

I. Singh

E. Bennett, S. Carpenter, N. Caraco

J. Quinton, Gerard Govers, K. Oost et al.

C. Leeuwis

N. Reddy, Yiqi Yang

A. Freibauer, M. Rounsevell, Pete Smith et al.

C. Micó, L. Recatalá, M. Peris et al.

L. Klerkx, B. V. Mierlo, C. Leeuwis

O. Deschenes

Yingjie Dai, Qiya Sun, Wensi Wang et al.

In recent years, various industrial activities have caused serious pollution to the environment. Due to the low operating costs and high flexibility, adsorption is considered as one of the most effective technologies for pollutant management. Agricultural waste has loose and porous structures, and contains functional groups such as the carboxyl group and hydroxyl group, so it can be invoked as biological adsorption material. Agricultural waste gets the advantages of a wide range of sources, low cost, and renewable. It has a good prospect for the comprehensive utilization of resources when used for environmental pollution control. This article summarized the current research status of agricultural waste in adsorbing pollutants, which pointed out the influencing factors of adsorption, expounded the adsorption mechanism of biological adsorption and introduced the related parameters of adsorption, proposed the application of adsorbents in engineering including adsorption in liquid and gas phases, at the same time it gave the future development prospect of agricultural waste as adsorbent.

Degnet Abebaw, Mekbib G. Haile

M. Aizen, S. Aguiar, J. Biesmeijer et al.

The global increase in the proportion of land cultivated with pollinator‐dependent crops implies increased reliance on pollination services. Yet agricultural practices themselves can profoundly affect pollinator supply and pollination. Extensive monocultures are associated with a limited pollinator supply and reduced pollination, whereas agricultural diversification can enhance both. Therefore, areas where agricultural diversity has increased, or at least been maintained, may better sustain high and more stable productivity of pollinator‐dependent crops. Given that >80% of all crops depend, to varying extents, on insect pollination, a global increase in agricultural pollinator dependence over recent decades might have led to a concomitant increase in agricultural diversification. We evaluated whether an increase in the area of pollinator‐dependent crops has indeed been associated with an increase in agricultural diversity, measured here as crop diversity, at the global, regional, and country scales for the period 1961–2016. Globally, results show a relatively weak and decelerating rise in agricultural diversity over time that was largely decoupled from the strong and continually increasing trend in agricultural dependency on pollinators. At regional and country levels, there was no consistent relationship between temporal changes in pollinator dependence and crop diversification. Instead, our results show heterogeneous responses in which increasing pollinator dependence for some countries and regions has been associated with either an increase or a decrease in agricultural diversity. Particularly worrisome is a rapid expansion of pollinator‐dependent oilseed crops in several countries of the Americas and Asia that has resulted in a decrease in agricultural diversity. In these regions, reliance on pollinators is increasing, yet agricultural practices that undermine pollination services are expanding. Our analysis has thereby identified world regions of particular concern where environmentally damaging practices associated with large‐scale, industrial agriculture threaten key ecosystem services that underlie productivity, in addition to other benefits provided by biodiversity.

P. Bustos, Bruno Caprettini, Jacopo Ponticelli