Large-Scale On-Farm Implementation of Soil Moisture-Based Irrigation Management Strategies for Increasing Maize Water Productivity

Irmak, Suat; Burgert, Michael J.; Yang, Haishun; Cassman, Kenneth G.; Walters, Daniel T.; Rathje, William R.; Payero, José O.; Grassini, Patricio; Kuzila, Mark S.; Brunkhorst, Kelly J.; Eisenhauer, Dean E.; Kranz, William L.; VanDeWalle, Brandy; Rees, Jennifer; Zoubek, Gary L.; Shapiro, Charles A.; Teichmeier, Gregory J.

doi:10.13031/2013.41521

Cited by 67 publications

(34 citation statements)

References 24 publications

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“…Despite the fact that reporting regions were relatively small, the spatial variability in rainfall might explain a portion of the field-to-field variation in irrigation amount. However, it is likely that differences in irrigation management, and particularly in irrigation scheduling account for a major portion of the observed field-to-field variation as found in previous studies in irrigated maize in NE (Grassini et al, 2011b;Irmak et al, 2011). Average on-farm IWUE across region-years was 5.5 kg ha −1 mm −1 , ranging from 2.4 to 9.9 kg ha −1 mm −1 (Figure 9b).…”

Section: Producer-reported Total Irrigation Amount and Variation Acromentioning

confidence: 74%

Drivers of spatial and temporal variation in soybean yield and irrigation requirements in the western US Corn Belt

Grassini

Torrion

Cassman

et al. 2014

Field Crops Research

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Section: Producer-reported Total Irrigation Amount and Variation Acromentioning

confidence: 74%

Drivers of spatial and temporal variation in soybean yield and irrigation requirements in the western US Corn Belt

Grassini

Torrion

Cassman

et al. 2014

Field Crops Research

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“…The result demonstrates that ET c -based irrigation can be an efficient water delivery scheme and irrigation management of corn at 75% ET c is feasible with 10% reduction of grain yield but increased WP. Irmak et al (2012) on a 65-ha maize field irrigated by centre pivot in Nebraska have found that wellmanaged deficit irrigation approaches can decrease irrigation amounts and increase IWP with minimal or no effect on yield. Djaman et al (2013) conducted five experiments on a 16-ha field irrigated using a four-span centre-pivot irrigation system at the similar site in Nebraska and found that the 75% of fully irrigated (FIT) and 60% of FIT treatments were viable practices in increasing crop water productivity of maize with supplementary irrigation under their experimental, soil and crop management, and climatic conditions.…”

Section: Introductionmentioning

confidence: 99%

Response of Maize Growth and Yield to Different Water and Nitrogen Schemes on Very Coarse Sandy Loam Soil Under Sprinkler Irrigation in the Semi‐Arid Region of China

Wen

2015

Irrigation and Drainage

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Farmers are being encouraged to shift from conventional surface irrigation to sprinkler irrigation in the semi-arid region where coarse-textured soil is predominant in order to improve irrigation efficiency, but their irrigation and fertilization are currently scheduled by the traditional methods obtained from surface irrigation due to insufficient knowledge of the relatively new technology of sprinkler irrigation. This often results in an inefficient use of water and nutrients and a decreased crop yield. The objective of this paper was to quantify the response of maize growth, nitrogen uptake, yield, yield components, water productivity and nitrogen agronomic efficiency to different irrigation and nitrogen application rates under semi-arid conditions and to determine an optimal irrigation and nitrogen regime for sprinkler irrigation. Field experiments were conducted on a very coarse sandy soil irrigated by a lateral move sprinkler system in the Inner Mongolia Autonomous Region in 2012 and 2013. Three irrigation levels of 40, 70 and 100% of evapotranspiration (ET c ) and four nitrogen application rates of 80, 160, 240 and 320 kg ha -1 were tested in 2012. Whereas in 2013, four irrigation levels of 40, 70, 100 and 130% of ET c and four nitrogen application rates similar to the 2012 experiments were used. For the very coarse soil tested, the irrigation level demonstrated a substantially more important influence on plant growth than nitrogen application rate. A higher irrigation level produced a significantly greater plant height, leaf area index (LAI), dry matter above ground, plant nitrogen uptake, yield and nitrogen agronomic efficiencies (NAE) when irrigation level was between 40 and 100% ET c . However, when the irrigation level exceeded 100% ET c , a reduced yield and NAE was observed. In 2012, the nitrogen application rate of 160 kg ha -1 usually gave a slightly higher yield and irrigation water productivity (IWP). Whereas in 2013, the nitrogen application rate of 240 kg ha -1 resulted in the greatest yield and IWP. No significant difference in yield, IWP and NAE was observed between the treatments with nitrogen application rates of 160 and 240 kg ha -1 for both 2012 and 2013 experiments. A management practice of irrigation at 100% ET c, along with nitrogen application rate of 160 kg ha

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“…Previous work has shown that irrigation management using soil moisture sensors can significantly reduce water use while maintaining or increasing yields and profits [2] [3] [4]. However, the wide variety of commercial soil moisture monitoring systems currently available makes it very difficult for farmers to make a good educated decision on which sensor to use and how to interpret the data collected using these sensors to make irrigation scheduling decisions.…”

mentioning

confidence: 99%

Evaluating the Effect of Soil Texture on the Response of Three Types of Sensors Used to Monitor Soil Water Status

Payero¹,

Qiao²,

Khalilian³

et al. 2017

JWARP

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Accurate monitoring of soil water status can be an important component of precision irrigation water management. A variety of commercial sensors measure soil water status by relating sensor electrical output to soil water content or soil water potential. However, sensor electrical output can also be affected by soil characteristics other than water content, such as soil texture, salinity, and temperature. This makes it difficult to accurately measure and interpret soil water status without prior on-site calibration. In this study, we investigated the impact of soil texture on the response of three types of sensors commonly used to monitor soil water status, including the Decagon EC-5, the Vegetronix VH400, and the Watermark 200ss granular matrix sensor. A replicated laboratory experiment was conducted to evaluate the response of these types of sensors using four major soil textural classes commonly found in South Carolina. We found that the three types of sensors had a significant response to changes in soil water content, but while the EC-5 and VH400 sensors had a linear response, the Watermark 200ss had a curvilinear response that was explained by an exponential decay function. The response of the three sensor types, however, was significantly affected by soil texture, which will significantly affect the trigger point used to initiate irrigation based on the output from these sensors. Therefore, it is suggested that guidelines on how to use these sensors for local soils need to be developed and made available to farmers, so that they can make better irrigation scheduling decisions.

show abstract

Large-Scale On-Farm Implementation of Soil Moisture-Based Irrigation Management Strategies for Increasing Maize Water Productivity

Cited by 67 publications

References 24 publications

Drivers of spatial and temporal variation in soybean yield and irrigation requirements in the western US Corn Belt

Drivers of spatial and temporal variation in soybean yield and irrigation requirements in the western US Corn Belt

Response of Maize Growth and Yield to Different Water and Nitrogen Schemes on Very Coarse Sandy Loam Soil Under Sprinkler Irrigation in the Semi‐Arid Region of China

Evaluating the Effect of Soil Texture on the Response of Three Types of Sensors Used to Monitor Soil Water Status

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