Plant community succession alters the quantity and chemistry of organic inputs to soils. These differences in organic input may trigger changes in soil ... ...

... term field and laboratory experiments on soil organic carbon transformations ... improved pastures, managed (and fertilized) forests, and abandoned and ... ...

The mountain rainforest region in South Ecuador is characterised by sites subjected to forest clearing by slash burn for pasture production. Repeated burning of pastures is a common management practice in South Ecuador. With ongoing pasture age bracken (Pteridium arachnoideum) outcompetes the pasture grass (Setaria ...

The effect of converting lowland tropical rainforest to pasture, and of subsequent succession of pasture lands to secondary forest, were examined in the Atlantic Zone of Costa Rica. Three replicate sites of each of four land-use types representing this disturbance-recovery sequence were sampled for changes in vegetation, pedological properties, and ...

We used quantitatively excavated soil pits to sample chronosequences of post-agricultural northern hardwood forest soils in the Hopkins Memorial Forest, Williamstown, MA, to determine how much carbon was lost during the period of agricultural use, and the rates at which C accumulated after abandonment. We developed chronosequences ...

Over the past several decades the mountain rainforest region of Southern Ecuador, a hotspot of biodiversity, is undergoing a rapid conversion to pastureland through slash and burn practice. Frequently this pastureland is invaded by the tropical bracken fern. When the bracken becomes dominant on the pasture sites the productivity decreases and the sites are ...

In developing countries of the humid tropics, timber exploitation and agricultural expansion frequently result in deforestation. Extensive land management, coupled with inherently low soil fertility invariably produce declines in agricultural/livestock productivity which eventually lead to land abandonment and further deforestation. Phosphorus is often the ...

A major cause of tropical deforestation has been the conversion of lowland forest into pastures for cattle grazing. The authors studied forest structure and species composition following abandonment of cattle pastures in 23 abandoned pastures 9.5-60 years...

... to recovery patterns after the abandonment of a coffee plantation. The study was conducted at Luquillo Experimental ... design and sampling regime in an abandoned sun coffee (Coffea arabica) plantation an...

We investigated changes in soil-atmosphere flux of CH{sub 4}, N{sub 2}O, and NO resulting from the succession of pasture to forest in the Atlantic lowlands of Costa Rica. We studied a dozen sites intensively for over one year in order to measure rates and to understand controlling mechanisms for gas exchange. CH{sub 4} flux was controlled primarily by ...

Rye used for hay. silage,pasture only, plowed under or abandoned ............... ...... Acres. 905. :3.ALL OTHER CROPS not reported above. ...