Comparisons between an Upland and a Pima Cotton Cultivar: II. Nutrient Uptake and Partitioning

Unruh, J. Bryan; Silvertooth, J. C.

doi:10.2134/agronj1996.00021962008800040016x

Cited by 38 publications

(26 citation statements)

References 6 publications

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“…The average N found in seed was calculated to be 42.1 and 3.0 g N kg −1 removed in the harvest lint. Although, this value is similar to Mullins and Burmester (1990) and Unruh and Silvertooth (1996), it is much higher than the recorded optimum N rates for cotton grown in Oklahoma of 83 g N kg −1 lint (Girma et al, 2007). If these plant components (burs, leaves, and stems) will be accounted in the algorithm, this will result to a 146.4 g N kg −1 lint.…”

Section: Percentage Nitrogen Removalsupporting

confidence: 56%

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Development of an NDVI‐Based Nitrogen Rate Calculator for Cotton

et al. 2016

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Abbreviations: CumGDD, cumulative growing degree day; DFP, days from planting; GDD, growing degree day; INSEY, in-season estimate of yield; LCB, Lake Carl Blackwell; NDVI, normalized difference vegetation index; NFOA, N fertilization optimization algorithm; NUE, N use efficiency; RI, response index; RI Harvest , response index of grain yield; RI NDVI , response index of NDVI measure midseason; SWR, Southwest Research Station; YP 0 , yield potential.

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Section: Percentage Nitrogen Removalsupporting

confidence: 56%

“…The NUE levels reported in the literature ranged from 25 to 60% (Bassett et al, 1970;Fritschi et al, 2004a,b;Hou et al, 2007;Janat, 2005;Unruh and Silvertooth, 1996). It was, however, discussed that soil type and climate play a significant role on expected NUE in cotton.…”

Section: Efficiency Factormentioning

confidence: 99%

Development of an NDVI‐Based Nitrogen Rate Calculator for Cotton

et al. 2016

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“…Cotton is the only crop that is a net export, as processing does not happen locally. Cotton lint only contains trace amounts of P, but P exports in cottonseed for oil production are substantial for the agricultural sector (Unruh and Silvertooth 1996). We assumed annual steady state for agricultural vegetation and constant standing pools for orchards over the one-year study period (see Appendix A for more details).…”

Section: Mass Balance Approachmentioning

confidence: 99%

Phosphorus in Phoenix: a budget and spatial representation of phosphorus in an urban ecosystem

Metson

Hale

Iwaniec

et al. 2012

Ecological Applications

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Abstract. As urban environments dominate the landscape, we need to examine how limiting nutrients such as phosphorus (P) cycle in these novel ecosystems. Sustainable management of P resources is necessary to ensure global food security and to minimize freshwater pollution. We used a spatially explicit budget to quantify the pools and fluxes of P in the Greater Phoenix Area in Arizona, USA, using the boundaries of the Central ArizonaPhoenix Long-Term Ecological Research site. Inputs were dominated by direct imports of food and fertilizer for local agriculture, while most outputs were small, including water, crops, and material destined for recycling. Internally, fluxes were dominated by transfers of food and feed from local agriculture and the recycling of human and animal excretion. Spatial correction of P dynamics across the city showed that human density and associated infrastructure, especially asphalt, dominated the distribution of P pools across the landscape. Phosphorus fluxes were dominated by agricultural production, with agricultural soils accumulating P.Human features (infrastructure, technology, and waste management decisions) and biophysical characteristics (soil properties, water fluxes, and storage) mediated P dynamics in Phoenix. P cycling was most notably affected by water management practices that conserve and recycle water, preventing the loss of waterborne P from the ecosystem. P is not intentionally managed, and as a result, changes in land use and demographics, particularly increased urbanization and declining agriculture, may lead to increased losses of P from this system. We suggest that city managers should minimize cross-boundary fluxes of P to the city. Reduced P fluxes may be accomplished through more efficient recycling of waste, therefore decreasing dependence on external nonrenewable P resources and minimizing aquatic pollution. Our spatial approach and consideration of both pools and fluxes across a heterogeneous urban ecosystem increases the utility of nutrient budgets for city managers. Our budget explicitly links processes that affect P cycling across space with the management of other resources (e.g., water). A holistic management strategy that deliberately couples the management of P and other resources should be a priority for cities in achieving urban sustainability.

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“…In crops yielding 1180 to 1630 kg lint/ha, Bassett et al (1970) measured export of 70, 11 and 21 kg/ha N, P and K respectively and noted that Na was largely excluded from the seed. Unruh and Silvertooth (1996) The equations take the form Y = a + bX, where Y is lint yield (kg/ha) and X is the nutrient uptake (g or kg/ha). Standard error of the coefficient is given in parentheses; P < 0.01 for all coefficients The equations take the form Y = a + bX, where Y is nutrient export (kg/ha) and X is the nutrient uptake (g or kg/ha).…”

Section: Nutrient Uptakementioning

confidence: 99%

Nutrient uptake and export from an Australian cotton field

Rochester

2006

Nutr Cycl Agroecosyst

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Soil fertility may decline as a result of nutrient export from high-yielding cotton crops and this may limit the productivity of future crops unless these nutrients are replaced. Uptake of nutrients by cotton (Gossypium hirsutum L.) and nutrient export from the field in seed were measured within two cropping systems experiments from 1999 to 2005 in a flood-irrigated cotton field. Lint yields of the seven crops assessed ranged from 975 to 2725 kg lint/ha. Nutrient uptake was measured at mid to late boll-fill and nutrient removal determined from analysis of delinted seed. Cotton crops accumulated an average of 180 kg N/ha (range 67-403), 27 kg P/ha (range 18-43), 167 kg K/ha (range 88-264), 41 kg S/ha, 160 kg Ca/ha, 36 kg Mg/ha, 7 kg Na/ha, 890 gm Fe/ha, 370 gm Mn/ha, 340 gm B/ha, 130 gm Zn/ha and 51 gm Cu/ha. On average, the seed within harvested seed cotton removed 93 kg N /ha (range 38-189), 18 kg P/ha (range 8-34), 29 kg K/ha (range 13-51), 8 kg S/ha, 4 kg Ca/ha, 12 kg Mg/ha, 0.2 kg Na/ha, 136 g Fe/ha, 12 g Mn/ha, 41 g B/ ha, 96 g Zn/ha and 20 g Cu/ha. Nutrients contained in the lint and trash were not included.For crops yielding about 1800 kg/ha, 70% of the Zn and P taken up was removed in the seed, also 52% of N, 38% of Cu, 34% of Mg, 21% of S, 17% of K and Fe, 12% of B and only 3% of Ca, Mn and Na. Predictive equations were developed to allow growers to estimate the removal of nutrients given the lint yield measured from their cotton crops.

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Comparisons between an Upland and a Pima Cotton Cultivar: II. Nutrient Uptake and Partitioning

Cited by 38 publications

References 6 publications

Development of an NDVI‐Based Nitrogen Rate Calculator for Cotton

Development of an NDVI‐Based Nitrogen Rate Calculator for Cotton

Phosphorus in Phoenix: a budget and spatial representation of phosphorus in an urban ecosystem

Nutrient uptake and export from an Australian cotton field

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