Modelling stochastic crop response to fertilisation when carry‐over matters

Jomini, Patrick; Deuson, Robert; Lowenberg-DeBoer, Jess; Bationo, A.

doi:10.1111/j.1574-0862.1991.tb00174.x

Cited by 6 publications

(7 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The static steady‐state‐based tax‐subsidy‐scheme yields almost the same NPV as the first‐best instrument, unless the soil of a target area has a high ability to hold nutrients (clay soils) and the legacy P store,

x_{0}

is considerably above its steady‐state level,

x^{⁎}

(Figure 5). This is because on coarse soils the steady state is reached fast in the beginning of a planning horizon, in line with the findings of the previous literature (Jomini et al, 1991; Kennedy et al, 1973). If

x_{0}

is far from

x^{⁎}

, the static tax‐subsidy‐scheme generates welfare losses from a long period in the beginning of a planning horizon.…”

Section: Quantitative Assessmentsupporting

confidence: 91%

“…cultivation in southern Finland on coarse and clay textured soils. Our modelling approach extends the approach by Jomini et al (1991), Bäckman and Lansink (2005), and Lambert et al (2007) who studied economically optimal P and N rates (in slightly different settings) while considering P carryover effects, by including N carryover, nutrient loss processes, environmental policy, and several nonlinear interactions among the model components in the analysis. We also extend the approach by Iho (2010), Iho and Laukkanen (2012a, 2012b) by including N in the analysis.…”

Section: Introductionmentioning

confidence: 96%

See 1 more Smart Citation

Management of legacy nutrient stores through nitrogen and phosphorus fertilization, catch crops, and gypsum treatment

Sihvonen

Lintunen

Валкама

et al. 2020

Natural Resource Modeling

View full text Add to dashboard Cite

We develop a modeling framework, based on discrete‐time dynamic optimization, to study the effect of legacy nutrient stores and soil nutrient dynamics on optimal nutrient management and agri‐environmental policy in crop production. Three alternative measures are studied to reduce nutrient loss: reduced fertilization, nonlegume catch crop cultivation and gypsum amendment. According to our results, landowner can bring down excessively high phosphorus stocks causing environmental damage within decades, by simultaneous optimization of the nitrogen and phosphorus fertilizers on the economic basis of profit maximization. Our results suggest that nitrogen loss abatement with catch crops is socially optimal, whereas the use of gypsum is well justified as a temporary measure on soils with high soil phosphorus levels. A dynamic tax‐subsidy‐scheme, which takes into account the current soil nutrient levels and field attributes such as soil texture, can enforce the socially optimal outcome. The welfare losses of the static steady‐state‐based tax‐subsidy‐schemes are increasing functions of the legacy nutrient stores and soil's ability to hold nutrients. Recommendations for Resource Managers We develop a modeling framework to study the effect of the legacy nutrient stores and the soil nutrient dynamics on the optimal nutrient management and agri‐environmental policy in crop production. Nonlegume catch crop cultivation is a socially optimal long‐term measure for nitrogen loss abatement, whereas phosphorus loss abatement with gypsum is socially optimal on soils with high soil phosphorus levels. A dynamic tax‐subsidy‐scheme, which is adjusted annually according to the soil nutrient stocks, leads to social optimum. Although this can be difficult to implement in practice, it can be useful in the derivation of the simpler, static tax‐subsidy‐schemes. If a gypsum subsidy is paid for those years, where the soil P level is above the threshold level for the gypsum application, the welfare loss of the static steady‐state‐based tax‐subsidy‐schemes is almost zero. Simultaneous adjustment of the N and P fertilizer rates enables the use of simple, static and soil‐texture‐ignorant tax‐subsidy schemes, without a notable social welfare loss

show abstract

x_{0}

is considerably above its steady‐state level,

x^{⁎}

x_{0}

is far from

x^{⁎}

, the static tax‐subsidy‐scheme generates welfare losses from a long period in the beginning of a planning horizon.…”

Section: Quantitative Assessmentsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 96%

Management of legacy nutrient stores through nitrogen and phosphorus fertilization, catch crops, and gypsum treatment

Sihvonen

Lintunen

Валкама

et al. 2020

Natural Resource Modeling

View full text Add to dashboard Cite

show abstract

“…Soils in Niger are generally sandy and low in organic matter (Jomini et al, 1991), deficient in phosphorus (P) and nitrogen (N) (Baïdu‐Forson and Bationo, 1992), and low in moisture‐retention capacity (Mahaman, 1988). Manure can provide organic matter and water retention, but it has very low nutrient value because the livestock eat poorly and because manure is always low in N and P. Only at very high levels of manure (not available to farmers in Niger) of 6 to 10 mt/ha can reasonable levels of N and P be provided.…”

Section: Fertilization Alternativesmentioning

confidence: 99%

Stages and determinants of fertilizer use in semiarid African agriculture: the Niger experience

Abdoulaye

Sanders²

2005

Agricultural Economics

112

View full text Add to dashboard Cite

Fertilization is a stepwise decision in Niger. Survey data from a representative sample of 100 households were utilized with individual and joint estimation to evaluate the determinants of fertilizer use at its three different stages: manure alone and two different types of inorganic fertilizer application. The fertilizer price relative to the millet price was always a highly significant determinant of fertilizer adoption. Farmers' experience in seeing the results of fertilization in the field was a principal factor influencing the use of manure and of the micro-fertilization. Other studies in semiarid regions have emphasized risk, liquidity, or fertilizer responsiveness under harsh conditions but the shift to the micro doses of inorganic fertilizer was statistically associated here with the demonstration trials and the price ratios (fertilizer/millet). A variable reflecting the millet price recovery approximately 6 months after harvest was the most important factor in the decision to raise further inorganic fertilizer use with side dressing. Policy implications were focused on the importance of demonstration trials and improvements in the economic conditions (millet-fertilizer price ratios). Copyright 2005 International Association of Agricultural Economics.

show abstract

“…Unfortunately, the rock generally has very low P levels and is insoluble except in higher rainfall, acidic soil environments. Even with devaluation the rock phosphate generally is so insoluble that it is not likely to become competitive with imported inorganic fertilizers (Jomini et al, 1991). The acidification to make it more soluble depends upon the availability of industrial raw materials not available in sub-Saharan Africa.…”

Section: Inorganic Fertilizersmentioning

confidence: 99%

Policies and Market Development to Accelerate Technological Change in the Semiarid Zones: A Focus on Sub-Saharan Africa

Sanders

Sharpiro

2015

Agronomy Monographs

View full text Add to dashboard Cite

Modelling stochastic crop response to fertilisation when carry‐over matters

Abstract: Jomini, P.A., Deuson, RR., Lowenberg-DeBoer, J. and Bationo, A., 1991. Modelling stochastic crop response to fertilization when carry-over matters. Agric. Econ.,

Cited by 6 publications

References 13 publications

Management of legacy nutrient stores through nitrogen and phosphorus fertilization, catch crops, and gypsum treatment

Management of legacy nutrient stores through nitrogen and phosphorus fertilization, catch crops, and gypsum treatment

Stages and determinants of fertilizer use in semiarid African agriculture: the Niger experience

Policies and Market Development to Accelerate Technological Change in the Semiarid Zones: A Focus on Sub-Saharan Africa

Contact Info

Product

Resources

About