[PDF] Top 20 Spatial variability of soil attributes and sugarcane yield in relation to topographic location

... submitted to the same management system in places with little variation of landscape, manifest differentiated spatial variability of their attributes and crop ... See full document

... role in spatial variability of crop ...low spatial correlation has generally been observed between maps of crop yield and of soil ...objectives ... See full document

... Clustering soil and crop data can be used as a basis for the definition of management zones because the data are grouped into clusters based on the similar interaction of these ...objective ... See full document

... approach to evaluate and discuss spatial variability related to the soil-plant system, using the state-space stochastic model, was presented by Timm et ...treatments and ... See full document

... degradation of soil with effects on crop productivity and pollution of the ...environment. To understand the spatial variability of this phenomenon, geostatistical ... See full document

... (2004) in sugar cane crop demonstrated that the attributes K and OM presented great amplitude in the surface layer of a Oxisol, suggesting that the uneven application of vinasse ... See full document

... fit to the data set. Siqueira et al. (2009) studied the spatial variability of soil electrical conductivity in area with topographic gradient and fitted the ... See full document

... test and emergence in seedbed, with four replications of each sampling point, according to the Rules for Seed Testing (Brasil, 2009); yield (Weber, 2005); electrical conductivity ... See full document

... common and well established practice, both in conventional and conservation production ...large spatial variability of the conditions of soil acidity, even ... See full document

... types of soil and crop (Mello et ...data variability. However, even for low and moderate variabilities, the use of geostatistical techniques is advised for the comprehension ... See full document

... objective of this work was to assess the spatial and temporal variability of sugarcane yield efficiency and yield gap in the state of ... See full document

... ute to studies of soil chemical attributes (Kravchenko & Bollock, 2000; Marques ...Landscape variability associated with topographic fea- tures affects spatial ... See full document

... ABSTRACT: Sugarcane (saccharum spp.) in Brazil is managed on the basis of “production ...application of fertilizers and definition of the planting and harvesting ... See full document

... range of spatial dependence values can provide information on the heterogeneity of the spatial distribution of the studied properties in each topographic position (table 2 ... See full document

... amounts of variably charged Al and Fe oxides and ...potential of charge exchange capacity at a given ...used to identify soil areas with greater or lesser nutrient uptake ... See full document

... The soil samples were sent to the laboratory for the evaluation of chemical attributes: phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), sulfur (S), sodium (Na), iron (Fe), boron ... See full document

... mean sugarcane root density, it can be noted that their values decreased by approximately ...47.8% in the 0.20-0.40 m depth layer, showing higher concentration of roots in the soil ... See full document

... no spatial dependence at depths of ...0.1–0.2 and 0.2–0.3 m after grazing (Table 5). Thus, the variability of this variable can be considered aleatory, and lower spacing will be ... See full document

... pH and SMP index (variance around the mean of 10 % and significance level of ...0.01) to a large number of subsamples, e.g., 26 for Al soil content for the least demanding ... See full document

... estimation of non available soil variables through the knowledge of other related measured variables can be achieved through pedotransfer functions (PTF) mainly saving time and reducing ...can ... See full document