Download e-book for kindle: Crop physiology by BIOTOL (Project); Open Universiteit (Heerlen, Netherlands);

By BIOTOL (Project); Open Universiteit (Heerlen, Netherlands); University of Greenwich

ISBN-10: 075060560X

ISBN-13: 9780750605601

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Still, some of the yield gap between onfarm yield and simulated yield potential might be captured by fine-tuning crop management in a manner that increases yield, while simultaneously reducing the resource input amount or cost. Indeed, substantive opportunities exist 1.

G × A INTERACTION Rincker et al. (2014) noted that the estimated rate of genetic improvement was significantly greater when the historic cultivar sets were evaluated in highly productive environments 1. Farming Systems 4 Challenges to higher yields and efficiencies vs less productive environments. This is a particular case of a widespread phenomenon, as illustrated in Chapter 16. For MGs II, III, and IV, the rates estimated in high vs low yield systems were a respective 24 vs 10 kg ha−1 year−1, 23 vs 17 kg ha−1 year−1, and 24 vs 18 kg ha−1 year−1.

4). Earlier maize sowing can increase yield because of increased duration of the growing season and, consequently, an increase in the total absorbed solar radiation. Kucharik (2008) showed that 19 to 53% of state-level yield increase during the 1979–2005 period can be attributed to earlier sowing in 6 out of the 12 states in the northern and western Corn Belt. Also, based on total maize and soybean harvested area data reported for the three major maize producer states, it can be inferred that the proportion of maize grown in a 2-year maize–soybean rotation has increased from 47% (1968–1972 average) to 65% (2007–2011 average).

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Crop physiology by BIOTOL (Project); Open Universiteit (Heerlen, Netherlands); University of Greenwich

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