Corrigenda - A synoptic approach for crop loss assessment used to study wheat. III. Variables derived from soil properties and traditional soil classifications suitable for regression studies

Soil Research ◽  
1981 ◽  
Vol 19 (1) ◽  
pp. 13
Author(s):  
LG Veitch ◽  
BA Stynes
Keyword(s):  
Soil Properties ◽  
Soil Classification ◽  
Growth And Yield ◽  
Loss Assessment ◽  
Crop Loss Assessment ◽  
Traditional Classification ◽  
Soil Information ◽  
New Variables ◽  
Physical And Chemical ◽  
Synoptic Approach

The combined information in the physical and chemical soil properties and in the traditional soil classification data has been split into three nearly uncorrelated groups of independent variables. One group comprises three variables and is concerned specifically with the traditional classification, a second group comprises seven variables and includes information specific to the soil properties, and a third group comprises one variable and includes the remainder of the information in the soil properties, i.e. that which is most strongly related to the traditional soil classification data. The new variables, which are substantially independent linear combinations of the original variables, form a convenient basis for the subsequent regression work in this study where the contribution of soil information to the variability of growth and yield of wheat in the study area is to be considered.

A synoptic approach for crop loss assessment used to study wheat. III. Variables derived from soil properties and traditional soil classifications suitable for regression studies

Soil Research ◽  
1981 ◽  
Vol 19 (1) ◽  
pp. 13
Author(s):  
LG Veitch ◽  
BA Stynes
Keyword(s):  
Soil Properties ◽  
Soil Classification ◽  
Growth And Yield ◽  
Loss Assessment ◽  
Crop Loss Assessment ◽  
Traditional Classification ◽  
Soil Information ◽  
New Variables ◽  
Physical And Chemical ◽  
Synoptic Approach

The combined information in the physical and chemical soil properties and in the traditional soil classification data has been split into three nearly uncorrelated groups of independent variables. One group comprises three variables and is concerned specifically with the traditional classification, a second group comprises seven variables and includes information specific to the soil properties, and a third group comprises one variable and includes the remainder of the information in the soil properties, i.e. that which is most strongly related to the traditional soil classification data. The new variables, which are substantially independent linear combinations of the original variables, form a convenient basis for the subsequent regression work in this study where the contribution of soil information to the variability of growth and yield of wheat in the study area is to be considered.

A synoptic approach for crop loss assessment used to study wheat. I. An appraisal of the physical and chemical soil properties in the study area

Soil Research ◽  
1979 ◽  
Vol 17 (2) ◽  
pp. 217 ◽  
Author(s):  
BA Stynes ◽  
HR Wallace ◽  
LG Veitch
Keyword(s):  
Soil Properties ◽  
South Australia ◽  
Principal Component ◽  
Growth And Yield ◽  
Crop Loss ◽  
Loss Assessment ◽  
Multivariate Statistical ◽  
Crop Loss Assessment ◽  
Selection Of Variables ◽  
Synoptic Approach

A synoptic approach to crop loss assessment is proposed whereby the relative importance of various factors in the environment can be assessed in relation to the growth and yield of plants. A degree of simplification of complex sets of data, collected in field surveys, can be achieved by analysing natural subsets of the data using multivariate statistical procedures. The concepts that emerge form a basis for constructing regression models to predict growth and yield by influencing the selection of variables for inclusion that ensure statistical stability and biological realism. Wheat crops on Yorke Peninsula, South Australia, were studied to evaluate this approach. This paper, comprising part of the study, is a principal component analysis of the soil properties which form a natural subset of the variables measured. It shows that the variation of soils in the study area can be characterized by the variation of relatively few soil properties.

Corrigendum - A synoptic approach for crop loss assessment used to study wheat. IV. The description of cultural practices and the combination of cultural data with soil data

1981 ◽  
Vol 32 (1) ◽  
pp. 1
Author(s):  
BA Stynes ◽  
LG Veitch
Keyword(s):  
Cultural Practices ◽  
Growth And Yield ◽  
Loss Assessment ◽  
Soil Variables ◽  
Weak Association ◽  
Crop Loss Assessment ◽  
Yorke Peninsula ◽  
Almost All ◽  
Alternative Set ◽  
Synoptic Approach

From an initial set of 13 measurements taken to define previous land use and the cultural practices adopted by farmers on Yorke Peninsula, S.A., an alternative set of eight variables was derived. The reduced number of variables retained almost all of the information present in the original set and were close to being statistically independent. This simplification is desirable for the later study, when these variables will be considered for inclusion in regression models to predict the growth and yield of wheat. A weak association between these variables and the soil variables specified in Paer III indicated that farmers were not strongly influenced by soil type and properties when deciding which cultural practices to adopt.

A synoptic approach for crop loss assessment used to study wheat. V. Crop growth and yield

1981 ◽  
Vol 32 (1) ◽  
pp. 9
Author(s):  
BA Stynes ◽  
LG Veitch ◽  
HR Wallace
Keyword(s):  
Root System ◽  
Growth And Yield ◽  
Seminal Root ◽  
Regression Analyses ◽  
General Study ◽  
Loss Assessment ◽  
Crop Loss Assessment ◽  
Yorke Peninsula ◽  
Morphological Variables ◽  
Synoptic Approach

As part of a general study of factors that affect wheat crops on Yorke Peninsula, S.A., growing and mature wheat plants were described in terms of morphological parameters and concentrations of elements in the tops. The measurements were taken 3 and 8 weeks after emergence of the crops, at anthesis and at maturity. The analyses of the morphological variables showed consistent patterns of variation in that, firstly, plants varied widely in their overall size, and secondly, that plants differed in the relative sizes of their tops and roots except at 8 weeks and at anthesis when the seminal root systems did not relate to the remainder of the plant. These two patterns of variation accounted for major portions of the variability, on average 88 % at 3 weeks, 95 % at 8 weeks and 88 % at anthesis, when the seminal root system was separated off in the latter two groups. The seminal root system and the element concentrations at 8 weeks and at anthesis were far less coherent sets of data. The results of these analyses provide the basis of the decisions concerning the information to go into the subsequent regression analyses for growth and yield of wheat.

Corrigendum - A synoptic approach for crop loss assessment used to study wheat. V. Crop growth and yield

1981 ◽  
Vol 32 (1) ◽  
pp. 9
Author(s):  
BA Stynes ◽  
LG Veitch ◽  
HR Wallace
Keyword(s):  
Root System ◽  
Growth And Yield ◽  
Seminal Root ◽  
Regression Analyses ◽  
General Study ◽  
Loss Assessment ◽  
Crop Loss Assessment ◽  
Yorke Peninsula ◽  
Morphological Variables ◽  
Synoptic Approach

As part of a general study of factors that affect wheat crops on Yorke Peninsula, S.A., growing and mature wheat plants were described in terms of morphological parameters and concentrations of elements in the tops. The measurements were taken 3 and 8 weeks after emergence of the crops, at anthesis and at maturity. The analyses of the morphological variables showed consistent patterns of variation in that, firstly, plants varied widely in their overall size, and secondly, that plants differed in the relative sizes of their tops and roots except at 8 weeks and at anthesis when the seminal root systems did not relate to the remainder of the plant. These two patterns of variation accounted for major portions of the variability, on average 88 % at 3 weeks, 95 % at 8 weeks and 88 % at anthesis, when the seminal root system was separated off in the latter two groups. The seminal root system and the element concentrations at 8 weeks and at anthesis were far less coherent sets of data. The results of these analyses provide the basis of the decisions concerning the information to go into the subsequent regression analyses for growth and yield of wheat.

A synoptic approach for crop loss assessment used to study wheat. IV. The description of cultural practices and the combination of cultural data with soil data

1981 ◽  
Vol 32 (1) ◽  
pp. 1
Author(s):  
BA Stynes ◽  
LG Veitch
Keyword(s):  
Cultural Practices ◽  
Growth And Yield ◽  
Loss Assessment ◽  
Soil Variables ◽  
Weak Association ◽  
Crop Loss Assessment ◽  
Yorke Peninsula ◽  
Almost All ◽  
Alternative Set ◽  
Synoptic Approach

From an initial set of 13 measurements taken to define previous land use and the cultural practices adopted by farmers on Yorke Peninsula, S.A., an alternative set of eight variables was derived. The reduced number of variables retained almost all of the information present in the original set and were close to being statistically independent. This simplification is desirable for the later study, when these variables will be considered for inclusion in regression models to predict the growth and yield of wheat. A weak association between these variables and the soil variables specified in Paer III indicated that farmers were not strongly influenced by soil type and properties when deciding which cultural practices to adopt.

A synoptic approach for crop loss assessment used to study wheat. II. Relationships between soil properties and traditional soil classifications

Soil Research ◽  
1979 ◽  
Vol 17 (2) ◽  
pp. 227 ◽  
Author(s):  
LG Veitch ◽  
BA Stynes
Keyword(s):  
Soil Properties ◽  
Water Content ◽  
Two Dimensions ◽  
Loss Assessment ◽  
Individual Values ◽  
Available Water Content ◽  
Soil Variables ◽  
Crop Loss Assessment ◽  
The Relationship ◽  
Soil Groups

Study of the relationship between soil properties and traditional soil classifications, using the canonical analysis procedure, showed that both a highly significant and a substantial relationship exists. Classification data on average accounts for about 35% of the total variation of the soil variable data, individual values ranging from about 8% for average log salinity to 74% for the -0.1 bar water content of the soil. The analysis showed that classification data in five soil groups could be substantially retained in two dimensions. The soil variables most involved in the first dimension were per cent clay and the -0.1 bar water content of the soil, and in the second dimension, the available water content of the subsoil (30-100 cm), average pH and average log salinity. These results should be useful in other studies where it is desired to incorporate soil information in a model designed to account for variation in one or more measures of interest.

scholarly journals Soil Protection in Floodplains—A Review

Land ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 149
Author(s):  
Mariam El Hourani ◽  
Gabriele Broll
Keyword(s):  
Soil Properties ◽  
Soil Classification ◽  
Minimum Data Set ◽  
Rooting Depth ◽  
Riparian Zones ◽  
Soil Protection ◽  
Detailed Knowledge ◽  
Data Set ◽  
Minimum Data ◽  
Soil Information

Soils in floodplains and riparian zones provide important ecosystem functions and services. These ecosystems belong to the most threatened ecosystems worldwide. Therefore, the management of floodplains has changed from river control to the restoration of rivers and floodplains. However, restoration activities can also negatively impact soils in these areas. Thus, a detailed knowledge of the soils is needed to prevent detrimental soil changes. The aim of this review is therefore to assess the kind and extent of soil information used in research on floodplains and riparian zones. This article is based on a quantitative literature search. Soil information of 100 research articles was collected. Soil properties were divided into physical, chemical, biological, and detailed soil classification. Some kind of soil information like classification is used in 97 articles, but often there is no complete description of the soils and only single parameters are described. Physical soil properties are mentioned in 76 articles, chemical soil properties in 56 articles, biological soil properties in 21 articles, and a detailed soil classification is provided in 32 articles. It is recommended to integrate at least a minimum data set on soil information in all research conducted in floodplains and riparian zones. This minimum data set comprises soil types, coarse fragments, texture and structure of the soil, bulk density, pH, soil organic matter, water content, rooting depth, and calcium carbonate content. Additionally, the nutrient and/or pollution status might be a useful parameter.

scholarly journals Biochar, poultry manure and NPK fertilizer: sole and combine application effects on soil properties and ginger (Zingiber officinale Roscoe) performance in a tropical Alfisol

2020 ◽  
Vol 5 (1) ◽  
pp. 30-39 ◽  
Author(s):  
Aruna Olasekan Adekiya ◽  
Taiwo Michael Agbede ◽  
Wutem Sunny Ejue ◽  
Christopher Muyiwa Aboyeji ◽  
Oluwagbenga Dunsin ◽  
...  
Keyword(s):  
Physical Properties ◽  
Soil Properties ◽  
Poultry Manure ◽  
Chemical Properties ◽  
Soil Physical Properties ◽  
Growth And Yield ◽  
Physical And Chemical Properties ◽  
Npk Fertilizer ◽  
Physical And Chemical ◽  
And Chemical Properties

AbstractBiochar has a low chemical composition and is recalcitrant to degradation. For good soil fertility and nutrient use efficiency of crops it becomes imperative that addition of a fast releasing nutrient source to biochar be sought. Therefore, studies were conducted in 2017 and 2018 to evaluate the effects of biochar with poultry manure (PM) and NPK fertilizer on soil properties, growth and yield of ginger. Treatments evaluated were: biochar applied alone at 15 t ha-1 , PM applied alone at 15 t ha-1, NPK fertilizer applied alone at 200 kg ha-1, biochar applied at 15 t ha-1 with poultry manure applied at 15 t ha-1 (B+PM), biochar applied at 15 t ha-1 with NPK fertilizer applied at 200 kg ha-1 (B+NPK) and a control with no amendment whatsoever. The experimental design was a randomized complete block design with three replications. Biochar, PM, NPK fertilizer alone or B+PM and B+NPK improved soil physical and chemical properties, growth and yield of ginger compared to no amendment (control). NPK fertilizer did not improve soil physical properties nor increased pH, OM, Ca and Mg significantly. B+PM and B+NPK improved soil physical and chemical properties, growth and ginger yield compared to their sole forms. Although B+PM had better soil physical properties, B+NPK increased yield and growth of ginger compared to B+PM. B+NPK increased the yield of ginger by 12.2% and 10.6% in 2017 and 2018, respectively compared with B+PM. B+NPK also increased the yield of ginger by 49.2% and 50.3% in 2017 and 2018, respectively compared to biochar alone. This was related to high presence of nutrients in B+NPK especially N and K which are important for ginger rhizome formation.

scholarly journals Influence of Tithonia Diversifolia on Maize (Zea mays L.) Yield, Fertility and Infiltration Status of Two Clay Varied Soils

2019 ◽  
Vol 8 (1) ◽  
pp. 114-119
Author(s):  
Olufemi Gabriel Dayo-Olagbende ◽  
Oluwawemimo Omowumi Akingbola ◽  
Gbolahan Saheed Afolabi ◽  
Babatunde Sunday Ewulo
Keyword(s):  
Zea Mays ◽  
Soil Properties ◽  
Zea Mays L ◽  
Chemical Properties ◽  
Growth And Yield ◽  
Physical And Chemical Properties ◽  
Tithonia Diversifolia ◽  
Total N ◽  
Physical And Chemical ◽  
And Chemical Properties

Towards a more sustainable soil management through recycling of readily available weeds in Akure, Nigeria, different rates of Tithonia diversifolia (tithonia) were compared on a field trial to evaluate its effect on soil properties. The experiment was sited at two locations in South gate of the Federal University of Technology, Akure. Prior to the field establishment, a composite soil sample was collected and analyzed for physico-chemical properties. The sites were cleared and tilled. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replicates. The treatments consisted of three levels of tithonia application which are 0, 3 and 6 t ha-1. Each experimental unit size was 2 m x 2 m with 1 m alleyway. Maize (Zea mays L. var.TZB-SR) seeds were sown at a spacing of 75 cm by 25 cm and 10 were randomly sampled per plot for growth and yield parameters. Data were collected on maize yield and soil physical and chemical properties after harvest to ascertain sustainability of the mulch material after cropping. Application of tithonia mulch improved growth, and yield indices of maize as well as soil physical and chemical properties. The contents of soil total N, exchangeable cations, , CEC, Organic matter content, total porosity, moisture content and infiltration rate were found to significantly (p>0.05)  increase in treatments with tithonia mulch. The best result was from the application rate 6 tha-1 because it improved and left the soil conserved after harvesting maize. Similar trends were observed at the two sites despite variation in inherent soil properties.

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