منابع مشابه
Soil Nitrocxn and Pasture Management
The. seasonal pattern of nitrogen mineralization is described and compared with the potential demand for nitrogen by grasses. Peak mineralization rates occur in spring but are quite inadequate for expression of potential grass growth. Nitrogen fixation by clovers provides a significant input into the system over a short period. Consideration of the fate of fixed nitrogen shows that losses large...
متن کاملPasture type and fertilization effects on soil chemical properties and nutrient redistribution
Chen, W., McCaughey, W. P., Grant, C. A. and Bailey, L. D. 2001. Pasture type and fertilization effects on soil chemical properties and nutrient redistribution. Can. J. Soil Sci. 81: 395–404. Soil samples were collected from beef pastures varying in species composition and fertilizer inputs after being grazed by cow-calf pairs for 4 yr (1995–1998) near Brandon, Manitoba. The objective of this e...
متن کاملSoil Carbon and Nutrient Changes Associated with Deforestation for Pasture in Southern Costa Rica
We assessed the effects of deforestation on soil carbon (C) and nutrient stocks in the premontane landscape near Las Cruces Biological Station in southern Costa Rica, where forests were cleared for pasture in the mid-1960s. We excavated six soil pits to a depth of 1 m in both pasture and primary forest, and found that C stocks were ~20 kg C/m in both settings. Nevertheless, soil dC suggests ~50...
متن کاملSlurry injection to optimize nutrient use efficiency in maize: Soil nitrogen dynamics and plant nutrient status
Slurry injection below maize seeds is a rather new application technique developed to improve the nitrogen use efficiency of liquid organic manure. To enable the characterization of the spatial and temporal soil mineral nitrogen (SMN) dynamics after slurry injection the present study aims to develop an appropriate soil sampling strategy. Three consecutive experiments were conducted. The first t...
متن کاملEstimation of Soil Infiltration in Agricultural and Pasture Lands using Artificial Neural Networks and Multiple Regressions
Common methods to determine the soil infiltration need extensive time and are expensive. However, the existence of non-linear behaviors in soil infiltration makes it difficult to be modeled. With regards to the difficulties of direct measurement of soil infiltration, the use of indirect methods toestimate this parameter has received attention in recent years. Despite the existence of various th...
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ژورنال
عنوان ژورنال: New Zealand Journal of Agricultural Research
سال: 1978
ISSN: 0028-8233,1175-8775
DOI: 10.1080/00288233.1978.10427429