S.A. O’Shaughnessy, C. Rush, in Encyclopedia of Agriculture and Food Systems, 2014 Physical Within-Field Variability The optimal field for agricultural production has minimal slope, variation in soil type, and drainage requirements. Irrigation systems should be properly designed for the inherent top...
For example, characterisation of soils has moved substantially onward from just coarse categorisations of soil type and suitability for a particular landuse. Now it is possible to get very detailed spatially explicit insights about individual soil properties such as pH, nitrogen, carbon, texture, ...
including at (a) each 1-degree latitude interval (excluding Orkney and Shetland due to the limited spatial coverage) to represent climate; (b) Land Cover Map (LCM) 200741Aggregate Class to incorporate effects of land management and organisms; and (c) the...
UNITED NATIONS, Dec. 5 (Xinhua) -- The United Nations on Tuesday launched the Global Soil Organic Carbon Map on World Soil Day, calling for "caring the ground we walk on." Soil is a major carbon storage system, essential for sustainable agriculture and climate change mitigation, the United ...
Hallett et al.24 demonstrated that mineral N fertilizers promote a rapid turnover of the light carbon fraction and growth of fungi and hyphae. The distribution of organic C and N was affected by many factors including crop rotation25, type and length of tillage26–29, and fertilizer ...
The soil below the upper layer from 20 to 50cm is referred to as the Substrata Type (C for clay and L for Loamy), and from 50 to 100cm is referred to Subsoil Type (C for clay, L for Loamy, and S for sandy). The condition indicators, directly relevant to plant growth, including...
Now install R/FIELDimageR using theinstall_githubfunction fromdevtoolspackage. If necessary, use the argumenttype="source". #You may need other packages first:install.packages(c('terra','mapview','sf','stars','caret','mapedit','devtools',"dplyr","fields","leafem","leafsync","lwgeom",...
General Soil Map, Colorado County, Texas Nitrate and sulfate have multiple sources in coastal agricultural areas.Subsurface processes justify site-specific isotopic fractionation effects.MixSIAR a... SE Brown 被引量: 0发表: 1994年 加载更多研究点推荐 Soil Map ...
(MJ mm hm−2h−1 a−1), as calculated using Equation (7); Ki is the soil erodibility factor (t hm2h hm−2 MJ−1 mm−1); LSi is the slope aspect factor; C is the land cover and management factor; P is the conservation measure factor related to land-use type (...
where Tt is the characteristic value of temperature; θ0 is the threshold value of moisture content, which is a function of soil type; z1, z2, z3, k and b are constants depending on soil structure and soil type, which can be obtained by indoor calibration experiments. 3.3 Classification...