A preliminary diagnosis and recommendation integrated system (DRIS) model for diagnosing the nutrient status of sweet potato (Ipomoea batatas)

Ramakrishna, Akkinapally; Bailey, J. S.; Kirchhof, G.

doi:10.1007/s11104-008-9763-5

Cited by 33 publications

(23 citation statements)

References 18 publications

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“…It is feasible to find on literature some crops on which DRIS had already been used to assess the nutritional status of plants, such as; pineapple (Sema et al, 2010), cotton (Silva et al, 2009;Serra et al, 2010a,b;Serra et al, 2012), rice (Guindani et al, 2009), potato (Bailey et al, 2009Ramakrishna et al, 2009), coffee (Nick, 1998), sugarcane (Elwali & Gascho, 1984;Reis Jr & Monnerat, 2002;Maccray et al, 2010), orange (Mourão Filho et al, 2004), apple (Natchigall et al, 2007a,b), mango (Hundal et al, 2005), corn (Reis Jr, 2002;Urricariet et al, 2004), soybean (Urano et al, 2006(Urano et al, , 2007, Eucalyptus (Wadt et al, 1998), among other crops.…”

Section: Diagnosis and Recommendation Integrated System (Dris)mentioning

confidence: 99%

Diagnosis and Recommendation Integrated System (DRIS) to Assess the Nutritional State of Plants

Serra¹,

Marchetti²,

Bungenstab³

et al. 2013

Biomass Now - Sustainable Growth and Use

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Section: Diagnosis and Recommendation Integrated System (Dris)mentioning

confidence: 99%

Diagnosis and Recommendation Integrated System (DRIS) to Assess the Nutritional State of Plants

Serra¹,

Marchetti²,

Bungenstab³

et al. 2013

Biomass Now - Sustainable Growth and Use

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“…1). Details about the landscape, vegetation, climate and sweet potato cultivation in the region are given in the previous paper by Ramakrishna et al (2008).…”

Section: Survey Location and Characteristicsmentioning

confidence: 99%

“…In a previous study, Ramakrishna et al (2008) used data from a limited number (56) of 'highyielding' planting stations in the 2005 survey to develop a diagnosis and recommendation integrated system (DRIS) model capable of evaluating the N, P, K and S statuses of sweet potato crops. In the present study, this model will be used to calculate DRIS N, P, K and S indices for all 203 planting stations.…”

Section: Introductionmentioning

confidence: 99%

An evaluation of nutritional constraints on sweet potato (Ipomoea batatas) production in the central highlands of Papua New Guinea

2008

Self Cite

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Sweet potato (Ipomoea batatas) is the staple food crop in the highlands of Papua New Guinea (PNG). Declining crop productivity, however, appears to be threatening the sustainability of sweet potato-based farming systems within the region, a probable cause being the exhaustion of soil nutrient reserves in continuously cultivated sweet potato gardens. To assess the extent of the problem, a survey of sweet potato gardens was conducted across four of the highlands provinces and information on soil and crop variables was obtained for old gardens (cultivated over many seasons) and new gardens (newly brought into cultivation) on soils of volcanic and non-volcanic origin. Crop leaf nutrient data collected in the survey were interpreted using the Diagnosis and Recommendation Integrated System (DRIS), to try to identify the main nutritional constraints on tuber production in different garden types on soils of volcanic or nonvolcanic origin. The results suggested that K deficiency was the primary cause of poor crop production in almost a third of sweet potato gardens, but was more of a problem in old gardens than in new. Phosphorus deficiency was also a problem on volcanic soils, and S deficiency on non-volcanic soils. These latter deficiencies, however, were at least as prevalent in new gardens as in old. Important factors contributing to K and S depletion from garden systems were the removal of K and S-rich vines from cultivation areas, the shortening of fallow periods and the burning of weed and crop residues, the latter releasing S (SO 2 ) to the atmosphere.

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“…Pressure on land resources has increased dramatically because of the population growth; fallow periods between cropping cycles have been shortened from several decades to less than 1 year in the recent past. Such decline in soil fertility and productivity induced by land use change has been reported in Africa, Mediterranean regions and Asia (Biro et al, 2013;Abu Hammad and Tumeizi, 2012;Liu et al, 2014) Previous work conducted across four of the highland provinces (Southern Highlands, Eastern Highlands, Simbu and Enga) established potassium (K) deficiency as the major nutrient-related cause for the poor sweet potato productivity in almost a third of sweet potato farms Ramakrishna et al, 2009;Walter et al, 2011). These studies also reported that K deficiency was more of a problem in old farms (which have been cropped for several crop cycles) than in new farms (which are ready for cropping after fallow periods).…”

Section: Introductionmentioning

confidence: 96%

Kinetics of potassium release in sweet potato cropped soils: a case study in the highlands of Papua New Guinea

Rao

2015

Solid Earth

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Abstract. The present study attempts to employ potassium (K) release parameters to identify soil-quality degradation due to changed land use patterns in sweet potato (Ipomoea batatas (L.) Lam) farms of the highlands of Papua New Guinea. Rapid population increase in the region increased pressure on the land to intensify subsistence production mainly by reducing fallow periods. Such continuous cropping practice coupled with lack of K fertilization practices could lead to a rapid loss of soil fertility and soilresource degradation. The study aims to evaluate the effects of crop intensification on the K-release pattern and identify soil groups vulnerable to K depletion. Soils with widely differing exchangeable and non-exchangeable K contents were sequentially extracted for periods between 1 and 569 h in 0.01 M CaCl 2 , and K-release data were fitted to four mathematical models: first order, power, parabolic diffusion and Elovich equations. Results showed two distinct parts in the K-release curves, and 58-80 % of total K was released to solution phase within 76 h (first five extractions) with 20-42 % K released in the later parts (after 76 h). Soils from older farms that were subjected to intensive and prolonged land use showed significantly (P < 0.05) lower cumulative K-release potential than the farms recently brought to cultivation (new farms). Among the four equations, first-order and power equations best described the K-release pattern; the constant b, an index of K-release rates, ranged from 0.005 to 0.008 mg kg −1 h −1 in the first-order model and was between 0.14 and 0.83 mg kg −1 h −1 in the power model for the soils. In the non-volcanic soils, model constant b values were significantly (P < 0.05) higher than the volcanic soils, thus indicating the vulnerability of volcanic soils to K deficiency. The volcanic soils cropped for several crop cycles need immediate management interventions either through improved fallow management or through mineral fertilizers plus animal manures to sustain productivity.

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A preliminary diagnosis and recommendation integrated system (DRIS) model for diagnosing the nutrient status of sweet potato (Ipomoea batatas)

Cited by 33 publications

References 18 publications

Diagnosis and Recommendation Integrated System (DRIS) to Assess the Nutritional State of Plants

Diagnosis and Recommendation Integrated System (DRIS) to Assess the Nutritional State of Plants

An evaluation of nutritional constraints on sweet potato (Ipomoea batatas) production in the central highlands of Papua New Guinea

Kinetics of potassium release in sweet potato cropped soils: a case study in the highlands of Papua New Guinea

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