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| Registros recuperados: 103 | |
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| Rosa,Stefanie Lais Kreutz; Souza,Jorge Luiz Moretti de; Tsukahara,Rodrigo Yoiti. |
| Abstract: The objective of this work was to calibrate and validate the AquaCrop model for the wheat (Triticum aestivum) crop in the Campos Gerais region, in Southern Brazil. Five cultivars were evaluated in the harvests from 2007 to 2017. The input data for AquaCrop - related to climate, crop, soil, and soil management -, collected in the field, were obtained from the database of Fundação ABC and from the literature. From 35 to 43% of total harvests were selected for calibration, and the remaining, for validation. Calibration was performed for the parameters most sensitive to crop potential yield penalty. The simulated yields were compared with those observed in the field through simple linear regression analysis, root mean square error (RMSE), Pearson’s... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Crop yield; Mathematical modeling. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2020000101000 |
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| Sangoi,Luís; Ender,Márcio; Guidolin,Altamir Frederico; Almeida,Milton Luiz de; Konflanz,Valmor Antônio. |
| Genetic selection of maize hybrids is often conducted using high N rates during the breeding cycle. This procedure may either lead to the release of genotypes that present nitrogen luxury consumption or require a stronger N input to accomplish their yield potential. This work was carried out to evaluate the effects of N rates on grain yield and N use efficiency of hybrids cultivated in different decades in Southern Brazil. The trial was performed in Lages, Santa Catarina State. A split plot design was used. Hybrids Ag 12, Ag 28, Ag 303 and Ag 9012, released during the 60's, 70's, 80's and 90's, respectively, were evaluated in the main plots. Nitrogen rates equivalent to 0, 50, 100 and 200 kg ha-1 were side-dressed in the split-plots when each hybrid had... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays; Hybrids; Absorption; Crop yield. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2001000500005 |
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| Marangoni,R.E.; Jakelaitis,A.; Tavares,C.J.; Rezende,B.P.M.; Mello Filho,O.L.; Cunha,P.C.R.. |
| This study aimed to evaluate the effects of weed interference on soybean cultivars at two sowing times in Urutaí, GO. The treatments were arranged in split-plots, and the sowing times (November 16 and December 16, 2009) were allocated in the plots; the soybean cultivars [BRSGO Amaralina, P98C81 (semi-late cycle) BRSGO Raissa, BRSGO Indiara, P98Y11 (median cycle) and BRSGO 7560, BRSGO Caiapônia, Emgopa 302RR (early cycle)] were allocated in the split-plots; and the coexistence or non coexistence of soybean cultivars with weeds, throughout their cycle, was allocated in the split-plots. Non coexistence was established by manual weeding. The experiment was arranged in randomized blocks with four replications. It was verified that the optimal time for sowing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Competition; Crop yield. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000300003 |
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| Kendy, Eloise; Molden, David J.; Steenhuis, Tammo S.; Liu, Changming; Wang, Jinxia. |
| The report examines the relationships between agricultural policies in the North China Plain, the approaches to water management that evolved from them, the quantity of water that was actually used, and the consequent groundwater depletion beneath Luancheng County, Hebei Province, from 1949 to 2000. To systematically address these relationships, we use a comprehensive water-balance approach. Our results indicate that a single, longstanding policy-that of using groundwater to meet the crop-water requirements not supplied by precipitation-is responsible for the steady rate of groundwater decline. |
| Tipo: Report |
Palavras-chave: Agricultural production; Groundwater; Aquifers; Water shortage; Irrigation efficiency; Agricultural policy; Crop production; Wastewaters; Water management; Hydrology; Economic development; Crop yield; Cotton; Wheat; Sprinkler irrigation; Water conservation; Water use efficiency; Pumping; Water balance; Vegetables; Rural economy; Irrigated framing; Community/Rural/Urban Development; Crop Production/Industries; Environmental Economics and Policy. |
| Ano: 2003 |
URL: http://purl.umn.edu/44560 |
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| Litchman, Gennadiy; Nukeshev, Sayahat. |
| The paper studies agricultural crops’ yield depending on quality of entering of mineral fertilizers. It is established that determining average productivity, under square-law dependence of yield on a dose, there is not necessity to set the law of fertilizers distribution across the field and will be sufficient to know expected value D and standard deviation sD. The paper considers approaches to economic-mathematical model of optimization of fertilizers’ doses at the differentiated entering. The produced result provides a new approach to the quality control in technological process of fertilizers application. Also, it allows formulating requirements to perspective technical means used for entering of mineral fertilizers. |
| Tipo: Journal Article |
Palavras-chave: Soil fertility; Mineral fertilizers; Crop yield; Response function; Agribusiness. |
| Ano: 2009 |
URL: http://purl.umn.edu/94557 |
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| Chowdhury, Mohammad A.T.; Zulfikar, Harry. |
| This is the seventh in the series of the Centre's publications providing specific and wide-ranging data on coarse grains, pulses, roots and tuber (CGPRT) crops in the humid tropics of Asia and the Pacific. The crop sub-sector dominates the agricultural scenario in Bangladesh. The greater uniformity of the landmass, the fertile alluvial soil and the tropical monsoon climate provide excellent conditions for crop production. If other things remain unchanged, agriculture will continue to play the main role in the growth and stability of the economy of Bangladesh for many years to come. This volume covers time-series statistics of Bangladesh on seventeen CGPRT crops plus two major cereals (rice and wheat) reporting area, production and yield at both national... |
| Tipo: Report |
Palavras-chave: Agriculture; Crops; Farm area; Production; Crop yield; Crop Production/Industries. |
| Ano: 2001 |
URL: http://purl.umn.edu/32668 |
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| Registros recuperados: 103 | |
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