000 03346nab a22005057a 4500
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003 MX-TxCIM
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022 0 _a0890-8524
040 _aMX-TxCIM
082 0 4 _a97-002161
100 1 _aIragavarapu, T.K.
245 0 0 _aBorder effects on yields in a strip-intercropped soybean, corn, and wheat production system
260 _c1996
340 _aPrinted
500 _areferences US (DNAL S539.5.J68)
520 _aStrip-intercropping of corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] normally results in corn producing a negative border effect on soybean production. This study was conducted to determine whether including a small grain strip between corn and soybean strips could reduce the negative border effects of corn and enhance soybean yields. Corn, soybean, and wheat (Triticum aestivum L.) were grown as strip intercrops (15-ft wide) in a ridge-till system at two locations in southern Minnesota from 1991 through 1994 and were compared with a two-crop corn-soybean system. Rows were oriented east-west at one location and north-south at the other. Soybean yield in the three-crop system was reduced by 17% for the north row adjacent to corn and 8% for the south row next to wheat compared with nonborder east-west rows. In north-south rows, soybean yields were reduced by 21% in the east row next to corn compared with nonborder rows with no yield reduction in the west row next to wheat. In the two-crop corn -soybean strip system, soybean yields were reduced by 34 and 11% in the south and north border rows, respectively, compared with the nonborder rows in east-west rows. In north-south rows, the outside east row yielded 19% less and the west row yielded 21% less than the nonborder rows. Corn yield of the outside north row next to wheat in east-west rows was 6% greater while the south row next to soybean yielded 18% greater than the nonborder rows. In north-south rows, the east outside row next to wheat yielded 23% greater and the west row next to soybean yielded 27% greater than the nonborder rows. In the two-crop system, yield of the outside corn rows was enhanced similarly compared with the nonborder rows in both row orientations. Wheat yield in the 5-ft section next to soybean was 4% greater than the center 5-ft section and 6% greater than the 5-ft section next to corn in east-west rows and 9 and 17% greater in north-south rows
546 _aEnglish
595 _aAC
650 1 0 _aAmerica
650 1 0 _aCrop husbandry
_91058
650 1 0 _aCropping patterns and systems
650 1 7 _aCropping systems
_gAGROVOC
_2
_91068
650 1 0 _aExperimentation
650 1 0 _aGlycine genus
650 1 0 _aGramineae
650 1 0 _aLake states usa
650 1 0 _aLeguminosae
650 1 0 _aNatural resources
650 1 0 _aNonrenewable resources
650 1 0 _aNorth America
650 1 0 _aNorth central states usa
650 1 0 _aPapilionoideae
650 1 0 _aPlant ecology
_91207
650 1 0 _aPlant products
650 1 0 _aUSA
650 1 0 _aWater resources
650 1 0 _aZea
650 1 7 _aTriticum
_gAGROVOC
_2
_91295
650 1 0 _91313
_aYields
_gAGROVOC
700 1 _aRandall, G.W.,
_ecoaut.
773 0 _tJournal of production agriculture (USA). (Jan-Mar 1996). v. 9(1) p. 101-107
942 _cJA
999 _c18930
_d18930