scholarly journals The effect of fertilizers on the soil nutrient balance under sugar beet

2019 ◽  
Vol 94 (1) ◽  
pp. 175-186
Author(s):  
A.T. Martynyuk ◽  
Keyword(s):  
Sugar Beet ◽  
Nutrient Balance ◽  
Soil Nutrient

scholarly journals Rice-Residue Management Practices of Smallholder Farms in Vietnam and Their Effects on Nutrient Fluxes in the Soil-Plant System

2019 ◽  
Vol 11 (6) ◽  
pp. 1641 ◽  
Author(s):  
Dao Trong Hung ◽  
Harold Hughes ◽  
Markus Keck ◽  
Daniela Sauer
Keyword(s):  
Crop Residue ◽  
Management Practices ◽  
Nutrient Balance ◽  
Soil Nutrient ◽  
Residue Management ◽  
Nutrient Cycles ◽  
Nutrient Balances ◽  
Smallholder Farms ◽  
Direct Incorporation ◽  
Rice Residues

In Vietnam, approximately 39 million tons of rice (Oryza sativa) residues accrue every year. In this study, we quantified soil nutrient balances of paddy rice fields under different crop-residue management practices in northern Vietnam. On twelve farms, we calculated nutrient balances for the four prevalent rice-residue management practices, i.e., (1) direct incorporation of rice residues into the soil, (2) application of rice-residue compost, (3) burning of rice residues on the field, and (4) the use of rice residues as fodder for livestock. Soils under practices (1) to (3) showed a positive nutrient balance, which indicates that soil fertility can be maintained under these practices and that the amounts of chemical fertilizers can be considerably reduced. If not, there is a risk of eutrophication in the surrounding surface waterbodies. Practice (4), in contrast, resulted in a negative nutrient balance, which indicates the need for returning nutrients to the soils. From our findings we conclude that knowledge about the effects of rice-residue management practices on nutrient cycles may help to optimize the use of fertilizers, resulting in a more sustainable form of agriculture.

scholarly journals Impact of depth of placement of mineral fertilizer micro-dosing on growth, yield and partial nutrient balance in pearl millet cropping system in the Sahel

2014 ◽  
Vol 153 (8) ◽  
pp. 1412-1421 ◽  
Author(s):  
A. IBRAHIM ◽  
D. PASTERNAK ◽  
D. FATONDJI
Keyword(s):  
Pearl Millet ◽  
Root Length Density ◽  
Nutrient Balance ◽  
Growth Yield ◽  
Cropping System ◽  
Soil Nutrient ◽  
Mineral Fertilizer ◽  
Fertilizer Application ◽  
Different Depths ◽  
Positive Effect

SUMMARYA study was carried out in the rainy seasons of 2008 and 2009 in Niger to investigate the effects of fertilizer micro-dosing on root development, yield and soil nutrient exploitation of pearl millet. Different rates of diammonium phosphate (DAP) were applied to the soil at different depths and it was found that although micro-dosing with DAP increased grain yield over the unfertilized control to a similar level as broadcast DAP, doubling the micro-dosage did not increase it further. Increasing the depth of fertilizer application from 5 to 10 cm resulted in significant increases in root length density, and deep application of fertilizer resulted in higher yields, although the increases were generally not significant. It was postulated that the positive effect of micro-dosing resulted from better exploitation of soil nutrients because of the higher root volume. Levels of nutrients exported from the soil were at least as high in plants receiving micro-dosing as the unfertilized control, and plants receiving micro-dosing exported 5–10 times more phosphorus from the soil than the amount added through fertilization.

scholarly journals Soil management in Brazilian states: comparative analyzes of Physical and Monetary Soil Nutrient Balance in 2005 and 2015

2020 ◽  
Vol 14 ◽  
Author(s):  
Wladimir Colman De Azevedo Junior ◽  
Marcos Rodrigues
Keyword(s):  
Land Use ◽  
Agricultural Production ◽  
Nutrient Balance ◽  
Soil Nutrient ◽  
Soil Management ◽  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Biological Fixation ◽  
Mato Grosso ◽  
Annual Balance

Intensive agricultural production tends to stimulate the outflow of nutrients from the soil, requiring producers to properly manage the soil to avoid reducing fertility in the following crops. Thus, the objective was to estimate the annual monetary balance of nutrients in the soil of six Brazilian states that present the highest consumption of inorganic fertilizers in the years 2005 and 2015. The Annual Balance of Nutrients in Soil was used to calculate the physical and monetary balance of nutrients, in the main crops of these States, by quantifying the export of N, P, K from the soil by plants and the insertion of nutrients, through the application of fertilizers, fertigation, and biological fixation. The monetary balance of N, P and K added for the six states was positive and increased by 114% between 2005 and 2015, however, the balance of P for the state of Paraná was negative in 2015 reaching R$ 1,769.17. The balances and Mato Grosso, Rio Grande do Sul, and Paraná were higher concerning Goiás, São Paulo, and Minas Gerais. Except for Paraná, related to P, there was no positive depreciation of the associated NPK nutrients. The different flows, in the comparison among states, are caused by the different dynamics of land use, mainly in the size of the corn and soybean cultivation area.

scholarly journals Evaluation of the effect of maize-legume intercropping on soil moisture improvement in arid area of Bena-Tsemay district, South omo zone, Southern Ethiopia

2020 ◽  
Vol 10 (1) ◽  
pp. 80-86
Author(s):  
HM Ayele
Keyword(s):  
Soil Moisture ◽  
Crop Yield ◽  
Crop Residues ◽  
Crop Yields ◽  
Nutrient Balance ◽  
Chemical Properties ◽  
Soil Nutrient ◽  
Moisture Stress ◽  
Southern Ethiopia ◽  
Crop Failure

Usually crop failure due to moisture shortage in soils is very much common due to high evaporation. Sometimes famers try to combat this problem by using mulches of crop residues in the study area. However, this is also highly challenged shortage because the crop residues used as feed for animals. Therefore, using the advantage and opportunity of cover legumes as an intercrop is the solution of the problems simultaneously in addition to their contribution improving soil nutrient balance and other many fold benefits. Therefore, this study aimed for evaluating the effect of maize-legume covers intercropping on soil moisture improvement and crop yield in moisture stress areas of the study area. The entire grain yield of maize and legumes, as well as soil moisture data were collected. The result on soil moisture revealed that intercropping of maize with cowpea had better soil moisture contents during active crop development (15.98%) and after harvest (16.70%) in average as compared to the others. The current finding also showed that adopting intercropping of maize with cowpea-boosted yield by 5256.24 kg ha-1 maize and 977.45 kg ha-1 cowpea in average with higher moisture improvement as compare to the other treatments. Therefore, intercropping of maize with cowpea is important to farmers since it would provide additional crop yield with the same piece of land. However, to get considerable changes on soil and water balances, other soil physic-chemical properties and crop yields, conducting similar studies in more than two years period at permanent field plots is paramount in the future. Int. J. Agril. Res. Innov. Tech. 10(1): 80-86, June 2020

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