Effect of high frequency surface and subsurface drip irrigation on root distribution of sweet corn

1991 ◽  
Vol 12 (3) ◽  
Author(s):  
C.J. Phene ◽  
K.R. Davis ◽  
R.B. Hutmacher ◽  
B. Bar-Yosef ◽  
D.W. Meek ◽  
...  
Keyword(s):  
Drip Irrigation ◽  
High Frequency ◽  
Root Distribution ◽  
Sweet Corn ◽  
Subsurface Drip Irrigation ◽  
Subsurface Drip

scholarly journals Irrigation Criteria for Drip-irrigated Onions

HortScience ◽  
2000 ◽  
Vol 35 (1) ◽  
pp. 63-66 ◽  
Author(s):  
Clinton C. Shock ◽  
Erik B.G. Feibert ◽  
Lamont D. Saunders
Keyword(s):  
Water Potential ◽  
Soil Water ◽  
Drip Irrigation ◽  
High Frequency ◽  
Soil Water Potential ◽  
Subsurface Drip Irrigation ◽  
Crop Evapotranspiration ◽  
Marketable Yield ◽  
Long Day ◽  
Subsurface Drip

Long-day onion (Allium cepa L. `Vision') was subjected to five soil water potential (SWP) treatments (–10, –20, –30, –50, and –70 kPa) using subsurface drip irrigation in 1997 and 1998. Onions were grown on 1.1-m beds with two double rows spaced 0.56 m apart and a drip tape buried 13 cm deep in the bed center. Soil water potential was maintained at the five levels by automated, high-frequency irrigations based on SWP measurements at 0.2-m depth. Onions were evaluated for yield and grade after 70 days of storage. In 1997, total and colossal (bulb diameter ≥102 mm) yield increased with increasing SWP, but marketable yield was highest at a calculated –21 kPa because of greater decomposition in storage in wetter treatments. In 1998 total, marketable, and colossal-grade onion yield increased with increasing SWP. Onion profits were highest with a calculated SWP of –17 kPa in 1997, and at the wettest level tested in 1998. Storage decomposition was not affected by SWP in 1998. Maintenance of SWP at –10 and –20 kPa required, respectively, 912 and 691 mm of water in 1997 and 935 and 589 mm of water in 1998. Onion crop evapotranspiration from emergence to the last irrigation totaled 681 mm in 1997 and 716 mm in 1998.

scholarly journals Onion Storage Decomposition Unaffected by Late-season Irrigation Reduction

2000 ◽  
Vol 10 (1) ◽  
pp. 176-178 ◽  
Author(s):  
Clinton C. Shock ◽  
Erik B.G. Feibert ◽  
Lamont D. Saunders
Keyword(s):  
Water Potential ◽  
Drip Irrigation ◽  
High Frequency ◽  
Total Yield ◽  
Soil Water Potential ◽  
The Other ◽  
Subsurface Drip Irrigation ◽  
Long Day ◽  
Four Levels ◽  
Subsurface Drip

Long-day onion (Allium cepa L.) `Vision' was submitted to four soil water potential (SWP) treatments using subsurface drip irrigation in 1997 and 1998. Onions were grown on two double rows spaced 22 inches (56 cm) apart on 44-inch (112-cm) beds with a drip tape buried 5 inches (13 cm) deep in the bed center. SWP was maintained at four levels by automated, high frequency irrigations based on SWP measurements at an 8-inch (20-cm) depth. The check treatment had SWP maintained at -20 cbar (kPa) during the entire season. The other three treatments had SWP maintained at -20 cbar until 15 July, then reduced to -30, -50, or -70 cbar. Reducing the SWP level after 15 July below -20 cbar failed to reduce onion bulb decomposition in storage, but reduced colossal onion yield in 1997, and marketable and total yield in 1998.

scholarly journals Tomato root distribution, yield and fruit quality under subsurface drip irrigation

2003 ◽  
Vol 255 (1) ◽  
pp. 333-341 ◽  
Author(s):  
Rui M.A. Machado ◽  
Maria do Rosário ◽  
G. Oliveira ◽  
Carlos A. M. Portas
Keyword(s):  
Fruit Quality ◽  
Drip Irrigation ◽  
Root Distribution ◽  
Subsurface Drip Irrigation ◽  
Tomato Root ◽  
Subsurface Drip

Subsurface Drip Irrigation and Fertigation of Broccoli

2002 ◽  
Vol 66 (1) ◽  
pp. 178 ◽  
Author(s):  
Thomas L. Thompson ◽  
Thomas A. Doerge ◽  
Ronald E. Godin
Keyword(s):  
Drip Irrigation ◽  
Subsurface Drip Irrigation ◽  
Subsurface Drip
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