Pod Yield and Mineral Concentration of Four Peanut Cultivars Following Gypsum Application With Subsurface Drip Irrigation

Abstract A 2-year study (2004 and 2005) was conducted where gypsum was applied to four peanut (Arachis hypogaea L.) cultivars and irrigated with subsurface drip to determine pod yield and mineral concentration of peanut plants and kernels. Gypsum rates were none, 560 and 1120 kg/ha. Peanut cultivars were C99R, Georgia Green (GG), NCV-11 (NCV), and GA-O2C (O2C). Irrigation was applied daily with subsurface drip irrigation except when precipitation exceeded the estimated daily water requirement. Average soil Ca and S concentrations increased as gypsum was applied, 5% and 20%, respectively, compared with the non-treated control. The average soil calcium to potassium (Ca∶K) ratio increased to 9.8∶1 compared with 7.6∶1 prior to applying calcium. When averaged across calcium rates, peanut leaves had 3 and 14 times higher calcium and 1.4 times higher S concentrations compared with pegs and pods, respectively. The cultivars GG and NCV had the same pod yield. Cultivars C99R and O2C had the same yield as NCV but were less than GG. Germination rates were higher when gypsum was added compared to the non-treated control and with cultivars C99R and O2C. There was no difference in vigor by gypsum application rate. Kernel Ca concentration was higher with the addition of gypsum compared to the non-treated control. Cold test germination seed vigor increased with C99R and O2C compared with GG and NCV.

Download Full-text

Effect of Gypsum Application Rate, Soil Type, and Soil Calcium on Yield, Grade and Seed Quality of Runner Type Peanut Cultivars

Peanut Science ◽

10.3146/ps16-16.1 ◽

2017 ◽

Vol 44 (1) ◽

pp. 13-18 ◽

Cited By ~ 2

Author(s):

J.A. Arnold III ◽

J.P. Beasley ◽

G.H. Harris ◽

T.L. Grey ◽

M. Cabrera

Keyword(s):

Field Experiments ◽

Seed Quality ◽

Soil Depth ◽

Application Rate ◽

Seed Vigor ◽

Application Rates ◽

Peanut Cultivars ◽

Research And Education ◽

The University ◽

Gypsum Application

ABSTRACT Calcium (Ca) availability in the 0 to 8 cm soil depth often limits peanut yield and influences grade in the southeastern United States. Field experiments were conducted in 2012 and 2013 at the University of Georgia's Coastal Plain Experiment Station, Tifton, GA (CPES) and the Southwest Georgia Research and Education Center, Plains, GA (SWREC) to determine large-seeded (Georgia-06G) and medium-seed sized (Georgia Greener) runner-type cultivar response to gypsum application rates of 0, 560, 1120, 1650 kg/ha. Peanut pod yield and grade (TSMK) were significantly different between locations with 7610 and 6540 kg/ha at CPES and SWREC, respectively. However, there were no differences between peanut cultivars or gypsum rates. Standard germination, seed vigor (cold germination), and seed Ca content analysis were also conducted on subsamples from each plot. Average peanut seed germination was 97% across all samples. No differences were observed for standard germination or vigor testing. Differences in locations were observed for yield, TSMK, percent jumbo, percent medium kernels, and seed Ca content. Peanut cultivar and gypsum application rate had effects on seed Ca concentration. Seed Ca concentration levels were 825 and 787 mg/kg for Georgia Greener and Georgia-06G, respectively. Seed Ca content increased as field gypsum application rate increased at both locations.

Download Full-text

A Subsurface Drip Irrigation System for Weighing Lysimetry

Applied Engineering in Agriculture ◽

10.13031/aea.12597 ◽

2018 ◽

Vol 34 (1) ◽

pp. 213-221 ◽

Cited By ~ 1

Author(s):

Steven R. Evett ◽

Gary W. Marek ◽

Paul D. Colaizzi ◽

Brice B. Ruthardt ◽

Karen S. Copeland

Keyword(s):

Drip Irrigation ◽

Irrigation System ◽

Application Rate ◽

Mass Change ◽

Subsurface Drip Irrigation ◽

Irrigation Season ◽

Irrigation Application ◽

Subsurface Drip ◽

New System ◽

Viscosity Changes

Abstract. Large, precision weighing lysimeters can have accuracies as good as 0.04 mm equivalent depth of water, adequate for hourly and even half-hourly determinations of evapotranspiration (ET) rate from crops. Such data are important for testing and improving simulation models of the complex interactions of surface water and energy balances, soil physics, plant growth, and biophysics that determine crop ET in response to rapid microclimate dynamics. When crops are irrigated with sprinkler systems or other rapid additions of water, the irrigation event is typically short enough that not much ET data are compromised by the lysimeter mass change due to irrigation. In contrast, subsurface drip irrigation (SDI) systems may take many hours to apply an irrigation, during which time the lysimeter mass change is affected by both ET rate and irrigation application rate. Given that irrigation application rate can be affected by pressure dynamics of the irrigation system, emitter clogging and water viscosity changes with temperature over several-hour periods, it can be difficult to impossible to separate the ET signal from the interference of the irrigation application. The inaccuracies in the data can be important, particularly for comparisons of sprinkler and SDI systems, since they are of the order of 8 to 10% of daily ET. We developed an SDI irrigation system to apply irrigations of up to 50 mm to large weighing lysimeters while limiting the period of lysimeter mass change due to irrigation delivery to approximately ten minutes by storing the water needed for irrigation in tanks suspended from the lysimeter weighing system. The system applied water at the same rate as the SDI system in the surrounding field, allowed irrigation over periods of any duration, but often exceeding 12 h, without directly affecting lysimeter mass change and the accuracy of ET rate determinations, and allowed irrigation overnight without compromising lysimeter daily ET measurements. Errors in lysimeter ET measurements using the previous SDI system, which was directly connected to the field irrigation system, were up to 10% of daily ET compared with negligible error using the new system. Errors using the previous, directly connected, SDI system varied over time due to variable system pressure, and possibly due to water temperature (viscosity) changes and emitter clogging. With the new system, all of the water transferred to the lysimeter weighing system was eventually applied by the SDI system regardless of temperature, pressure, or emitter clogging. Differences between planned and applied irrigation depth were less than 2% over the irrigation season. Keywords: Evapotranspiration, ET, Subsurface drip irrigation, SDI, Weighing lysimeter.

Download Full-text

POD YIELD AND KERNEL SIZE DISTRIBUTION OF PEANUT PRODUCED USING SUBSURFACE DRIP IRRIGATION

Applied Engineering in Agriculture ◽

10.13031/2013.5460 ◽

2001 ◽

Vol 17 (2) ◽

Cited By ~ 2

Author(s):

R. B. Sorensen ◽

F. S. Wright ◽

C. L. Butts

Keyword(s):

Size Distribution ◽

Drip Irrigation ◽

Subsurface Drip Irrigation ◽

Kernel Size ◽

Pod Yield ◽

Subsurface Drip

Download Full-text

Subsurface Drip Irrigation and Fertigation of Broccoli

Soil Science Society of America Journal ◽

10.2136/sssaj2002.0178 ◽

2002 ◽

Vol 66 (1) ◽

pp. 178 ◽

Cited By ~ 4

Author(s):

Thomas L. Thompson ◽

Thomas A. Doerge ◽

Ronald E. Godin

Keyword(s):

Drip Irrigation ◽

Subsurface Drip Irrigation ◽

Subsurface Drip

Download Full-text

Behaviour of the fecal pollution indicators in a soil irrigated with treated wastewater under onsurface and subsurface drip irrigation

Water Science & Technology ◽

10.2166/wst.2000.0294 ◽

2000 ◽

Vol 42 (1-2) ◽

pp. 75-79 ◽

Cited By ~ 7

Author(s):

C. Campos ◽

G. Oron ◽

M. Salgot ◽

L. Gillerman

Keyword(s):

Organic Matter ◽

Drip Irrigation ◽

Organic Matter Content ◽

Fecal Pollution ◽

Fecal Coliforms ◽

Subsurface Drip Irrigation ◽

Treated Wastewater ◽

Reclaimed Wastewater ◽

Pollution Indicators ◽

Subsurface Drip

A critical objective for any wastewater reuse programme is to minimise health and environmental hazard. When applying wastewater to soil–plant systems, it is to be noted that the passage of water through the soil considerably reduces the number of microorganisms carried by the reclaimed wastewater. Factors that affect survival include number and type of microorganisms, soil organic matter content, temperature, moisture, pH, rainfall, sunlight, protection provided by foliage and antagonism by soil microflora. The purpose of this work was to examine the behaviour of fecal pollution indicators in a soil irrigated with treated wastewater under onsurface and subsurface drip irrigation. The experiment was conducted in a vineyard located at a commercial farm near the City of Arad (Israel). Wastewater and soil samples were monitored during the irrigation period and examined for fecal coliforms, somatic and F+ coliphages and helminth eggs. Physico-chemical parameters were controlled in order to determine their relationship with removal of microorganisms. The results showed high reduction of the concentration of microorganisms when wastewater moves through the soil; and a good correlation between the reduction of fecal pollution indicators and moisture content, organic matter concentration and pH. The application of secondary treated domestic wastewater in this specific soil and under these irrigation systems affect the survival of microorganisms, thus reducing the health and environmental risk.

Download Full-text