نتایج جستجو برای: agricultural total factorproductivity
تعداد نتایج: 890560 فیلتر نتایج به سال:
Stream-bed sediments from three paired catchments, each draining a lower agricultural intensity system and a higher agricultural intensity system, were analysed for (a) total P (TP), (b) bioavailable-P (Resin-P), (c) equilibrium phosphorus concentration (EPC0), and (d) degree of phosphorus saturation (DPS). The influence of agriculture on sediment P was explored within the context of other key ...
The Agricultural Act of 2014 solidified insurance as the cornerstone of U.S. agricultural policy. The Congressional Budget Office (2014) estimates this Act will increase spending on agricultural insurance programs by $5.7 billion to a total of $89.8 billion over the next decade. In 2014, total government liabilities associated with the crop insurance program exceeded $108.5 billion. In light of...
Few studies describe the primary drivers influencing soil organic carbon (SOC) stocks and the distribution of carbon (C) fractions in agricultural systems from semi-arid regions; yet these soils comprise one fifth of the global land area. Here we identified the primary drivers for changes in total SOC and associated particulate (POC), humus (HOC) and resistant (ROC) organic C fractions for 1347...
Cadmium is a common impurity in phosphatic fertilizers and may contribute to soil Cd accumulation. Changes in total and bioavailable Cd burdens to agricultural soils and the potential for plant Cd accumulation resulting from fertilizer input was investigated. Three year field studies were conducted using three dose levels of cadmium-rich, commercial, phosphate fertilizers applied at four agricu...
Based on panel data from the National rural fixed point survey 2011 to 2018 and Peking University digital financial inclusion (DFI) index data, this article uses dynamic effect model analyze of access inclusive financing platforms agricultural total factor productivity (TFP) its contributing factors at household level. The results show that DFI have a significant hysteresis positive impact TFP ...
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