scholarly journals RESEARCH ON DETERMINING THE NUTRITIONAL REQUIREMENTS OF VARIOUS POTATO VARIETIES AT SOLFARM SRL, COVASNA COUNTY

2021 ◽  
Vol 10 (19) ◽  
pp. 121-128
Author(s):  
Iringo Deak ◽  
Mircea Mihalache
Keyword(s):  
Soil Analysis ◽  
Soil Nutrient ◽  
Nutrient Content ◽  
Soil Condition ◽  
Nutrient Supply ◽  
Mobile Form ◽  
Zn Content ◽  
Organic Fertilisers ◽  
Nitrogen Phosphorus ◽  
Ground Part

Potato cultivation is mainly influenced by the type of fertilisers used, the dosage of mineral or organic fertilisers applied based on the soil nutrient supply and texture of the soil. The potato’s particularities in growing stolons and tubers in the soil, the superficial root system, reltively smaller when compared to the above-ground part, make the plant’s soil condition requirements different from other crops. The purpose of these experiments was to determine the nutrient content in the soil, in order to accurately determine the macro- and micro-element requirements, decided before starting the cultivation, as they are highly important in order to obtain a good yield. In order to monitor the soil nutrient supply, soil samples were taken at a depth of 0-20 and 20-40 cm for ten different varieties, i.e. Arizona, Esmee, Riviera, Red Lady, Carrera, Jelly, Red Fantasy, Levantina, Bellarosa and Luna Rosa, and based on them the ph values, the humus, nitrogen, phosphorus, potassium and mobile form (Cu, Fe, Mn, Zn) content were established. Soil analysis is extremely important before starting the cultivation, because it helps farmers determine whether the type of soil is suitable for the plants to be grown and to determine an adequate fertilisation plan.

Study on the Relationship between Soil Nutrient and Yield Analysis Based on Bivariate Correlation between

2014 ◽  
Vol 998-999 ◽  
pp. 1466-1469
Author(s):  
Li Ying Cao ◽  
Xiao Xian Zhang ◽  
Yue Ling Zhao ◽  
Gui Fen Chen
Keyword(s):  
Soil Nutrient ◽  
Nutrient Content ◽  
Maize Yield ◽  
Nutrient Level ◽  
Corn Yield ◽  
Yield Analysis ◽  
Bivariate Correlation ◽  
Plot Yield ◽  
The Relationship ◽  
Nitrogen Phosphorus

Soil nutrient level is an important factor affecting the yield of corn, to find out the effect of nitrogen, phosphorus, potassium on maize yield, analysis of bivariate correlation in SPSS based on the relationship between nutrient content, nitrogen, phosphorus, potassium in the plot and each plot yield directly was analyzed, the experimental results show that it doesn't matter: P, K and the yield of corn, corn yield and nitrogen related.

scholarly journals Soil nutrient content in relation to women's agricultural knowledge in the urban gardens of Kisumu, Kenya

2018 ◽  
Author(s):  
Nicolette Tamara R. J. M. Jonkman ◽  
Esmee D. Kooijman ◽  
Boris Jansen ◽  
Nicky R. M. Pouw ◽  
Karsten Kalbitz
Keyword(s):  
Cultural Context ◽  
Management Practices ◽  
Soil Analysis ◽  
Soil Nutrient ◽  
Nutrient Content ◽  
Agricultural Management ◽  
Urban Gardens ◽  
Available N ◽  
Agricultural Knowledge ◽  
Soil Nutrient Content

Abstract. Agricultural production in Kenya has been declining since the 1980s, either because soils are mismanaged or because they lack nutrients. In Kisumu, just under 50 % of the workers in the urban gardens are female. On average, women spend more hours a day in the gardens than men. To increase yields, women’s knowledge has to be considered in agricultural management. However, women face greater obstacles in land ownership, investment, and farm inputs due to social and cultural constraints as consequence of their gender. This case study aimed to determine the nutrient content in soils of the urban gardens of Kisumu, the agricultural knowledge of the women farmers and how their knowledge influences soil nutrient content through their management. Soils were sampled in Nyalenda, one of Kisumu's informal settlements where urban gardening is practised, to determine soil nutrient content. To determine how agricultural management practices influences total C and N, available N and P, and exchangeable K, Mg and Ca in the soil, two prevailing practices were compared: (1) applying manure only, and: (2) applying manure while intercropping with cowpeas. Interviews and focus group discussions were organised to determine what knowledge the female vegetable farmers possess, and where they acquired their knowledge. Soil analysis showed that agricultural management had significant effects on nutrient presence and availability. Intercropping led to significantly lower total soil nutrient contents than when only manure was applied. However, due to socio-economic factors, such as poverty, intercropping was applied in a way that did not increase soil nutrients but diversified revenue. The knowledge of the female vegetable growers was found to be limited to practical and sensory knowledge. This shows that in addition to socio-economic and cultural context, gendered knowledge differentiation has to be acknowledged and used in agricultural training when aiming to improve soil nutrient status and agricultural yields.

Soil and forest floor characteristics of Scots pine stands on drift sands

1992 ◽  
Vol 57 ◽  
Author(s):  
D. Maddelein ◽  
N. Lust
Keyword(s):  
Scots Pine ◽  
Tree Growth ◽  
Forest Floor ◽  
Soil Analysis ◽  
Mineral Soil ◽  
Soil Nutrient ◽  
Nutrient Content ◽  
Poor Quality ◽  
Tree Litter ◽  
Nutrient Amounts

In  Flanders, important drift sand areas were afforestated with Scots pine (Pinus sylvestris L.) during the last  century. Drought stress and limited nutrient availability are two major  factors limiting tree growth on these sites. Nevertheless, afforestation  succeeded extremely well and tree growth can be considered as satisfactory.      Chemical soil analysis stresses the very poor quality of the mineral soil.  Nutrient content of the mineral soil is even poorer than that of neighbouring  heathland soils.     The formation of a well developed forest floor is the most important  feature of soil evolution during the last century. A seventy year old stand  has built up a thick forest floor, with a biomass of over 10 kg/m2. This  layer functions as a main nutrient source in the ecosystem.     Annually, 4000 to 5000 kg of tree litter per hectare return to the forest  soil. Sixty percent of this fraction consists of shed needles. Needles also  have a dominant share in the nutrient amounts returned with tree litter.  Annually, about 42 kg of N, 8 kg of K, 15 kg of Ca and 2 kg of P and Mg are  returned to the soil with tree litter. These values are, with exception of N,  very low compared to other forest ecosystems.    The herbaceous layer, poor in species and dominated by wavy-hair grass (Deschampsia flexuosa (L.) Trin.),  also produces over 2500 kg of litter per year and per hectare, and plays an  equally important role in the nutrient supply of the growing vegetation.          Key words: Scots pine, drift sand, forest floor, litter

scholarly journals Effect of pollinator cultivars on nutrient content in some Turkish hazelnut cultivars

2021 ◽  
pp. 13-19
Author(s):  
Huseyin Irfan Balik
Keyword(s):  
Nutrient Content ◽  
Corylus Avellana ◽  
Potassium Content ◽  
Fe Content ◽  
Zn Content ◽  
Phosphorus And Potassium ◽  
Corylus Avellana L ◽  
Nitrogen Phosphorus

The main objective of this study was to assess the pollen effects on macro and micro nutrition elements on hazelnut cultivars (Corylus avellana L.). Tombul, Palaz, Çakıldak, Foşa and Allahverdi were used as main cultivars while Tombul, Palaz, Çakıldak, Foşa, Allahverdi, Sivri, Kalınkara and Yassı Badem were used as pollinator cultivars. In the study, it was investigated that the pollinator cultivars caused changes in some nutrition elements. The effects of the applications on nitrogen, phosphorus and potassium content were found to be statistically significant. It was determined that the nutrition element with the highest rate in the examined hazelnut cultivars is potassium. It has been observed that the amount of potassium is high in Tombul-pollinator treatments. The potassium content of Foşa and Çakıldak weres found to be higher than other cultivars. In Palaz and Yassı Badem- pollination treatments, it has been observed that the Ca content is generally lower than other treatments. Fe content was found to be significantly higher in Palaz-pollination treatments. The highest Mn and Zn content was obtained from Çakıldak. As a result, it has been revealed that pollinators may have an effect on nutrient content.

scholarly journals Soil Nutrient Status of Brahmaputra Floodplain Area in Tangail Sadar Upazila for Agricultural Uses

2016 ◽  
Vol 8 (2) ◽  
pp. 11-14
Author(s):  
MAM Hossen ◽  
SA Lira ◽  
MY Mia ◽  
AKMM Rahman
Keyword(s):  
Soil Nutrient ◽  
Nutrient Status ◽  
Available Phosphorus ◽  
Soil Nutrient Status ◽  
Fe Content ◽  
P Content ◽  
Zn Content ◽  
Floodplain Area ◽  
Very High ◽  
Brahmaputra Floodplain

Soil samples from high land, medium high land, medium low land and low land of Brahmaputra Floodplain area showed that pH of the soils were slightly acidic; organic matter (OM) content was medium; total nitrogen (N), available potassium (K) and boron (B) content were low; available phosphorus (P) content was very low; available sulfur (S) and calcium (Ca) content were medium to very high; magnesium (Mg) and zinc (Zn) content were low to optimum; copper (Cu), manganese (Mn) and iron (Fe) content were very high suggesting the fact that soils of this area is moderately suitable for agricultural uses.J. Environ. Sci. & Natural Resources, 8(2): 11-14 2015

scholarly journals Estimation of Soil Nutrient Content Using Hyperspectral Data

Agriculture ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1129
Author(s):  
Yiping Peng ◽  
Lu Wang ◽  
Li Zhao ◽  
Zhenhua Liu ◽  
Chenjie Lin ◽  
...  
Keyword(s):  
Least Squares ◽  
Soil Nutrients ◽  
Cross Validation ◽  
Regional Scale ◽  
Soil Nutrient ◽  
Nutrient Content ◽  
New Method ◽  
Accurate Estimation ◽  
Support Vector ◽  
Soil Nutrient Content

Soil nutrients play a vital role in plant growth and thus the rapid acquisition of soil nutrient content is of great significance for agricultural sustainable development. Hyperspectral remote-sensing techniques allow for the quick monitoring of soil nutrients. However, at present, obtaining accurate estimates proves to be difficult due to the weak spectral features of soil nutrients and the low accuracy of soil nutrient estimation models. This study proposed a new method to improve soil nutrient estimation. Firstly, for obtaining characteristic variables, we employed partial least squares regression (PLSR) fit degree to select an optimal screening algorithm from three algorithms (Pearson correlation coefficient, PCC; least absolute shrinkage and selection operator, LASSO; and gradient boosting decision tree, GBDT). Secondly, linear (multi-linear regression, MLR; ridge regression, RR) and nonlinear (support vector machine, SVM; and back propagation neural network with genetic algorithm optimization, GABP) algorithms with 10-fold cross-validation were implemented to determine the most accurate model for estimating soil total nitrogen (TN), total phosphorus (TP), and total potassium (TK) contents. Finally, the new method was used to map the soil TK content at a regional scale using the soil component spectral variables retrieved by the fully constrained least squares (FCLS) method based on an image from the HuanJing-1A Hyperspectral Imager (HJ-1A HSI) of the Conghua District of Guangzhou, China. The results identified the GBDT-GABP was observed as the most accurate estimation method of soil TN ( of 0.69, the root mean square error of cross-validation (RMSECV) of 0.35 g kg−1 and ratio of performance to interquartile range (RPIQ) of 2.03) and TP ( of 0.73, RMSECV of 0.30 g kg−1 and RPIQ = 2.10), and the LASSO-GABP proved to be optimal for soil TK estimations ( of 0.82, RMSECV of 3.39 g kg−1 and RPIQ = 3.57). Additionally, the highly accurate LASSO-GABP-estimated soil TK (R2 = 0.79) reveals the feasibility of the LASSO-GABP method to retrieve soil TK content at the regional scale.

scholarly journals Rekomendasi Pemupukan Fosfor dan Potasium berdasarkan Analisis Hara Tanah pada Tanaman Sayuran

2014 ◽  
Vol 1 (2) ◽  
pp. 81
Author(s):  
Lutfi Izhar ◽  
Anas D. Susila
Keyword(s):  
Soil Type ◽  
Agricultural Development ◽  
Soil Analysis ◽  
Soil Nutrient ◽  
Nutrient Status ◽  
Vegetable Crops ◽  
Soil P ◽  
Fertilizer Recommendation ◽  
Fertilizer Recommendations ◽  
Low K

<p>ABSTRACT</p><p><br />Vegetables are important agricultural commodities. Productivity of vegetables in Indonesia is still low. One effort that can be done is an application of specific fertilizer recommendations. Fertilizer recommendation based on soil analysis is still rarely for vegetable crops and need further development. The purpose of this paper is to describe some fertilizer recommendations based on soil analysis for vegetable crops. Three stages to consider in the assessment of the research such as soil incubation, correlation test, calibration test and fertilizer <br />recommendation statue. Application all this stages of soil method recommendation in Indonesia is still not widely applied. Two researches which were completed until the entire stage has been done for yard long beans and <br />tomatoes. Recommendations for tomatoes on Inceptisols soil type with very low nutrient status of soil K was 180 kg K2O ha- 1, a low K soil nutrient status was 131.4 kg K2O ha-1, soil K nutrient status was 82.2 kg K 2O ha-1. Yard <br />long bean that planted on Ultisol soil type with low soil P nutrient status was recommended by an application of 185.8 kg P2O5 ha-1, medium soil P nutrient status was added 174.9 kg P2O5 ha-1. Development of fertilizer recommendation based on soil testing to support agricultural development in Indonesia still has some problems and need some strategies for further research, application and dissemination in the future.</p><p>Key words: vegetables, soil test, fertilizer recommendation</p>

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