西尾 洸毅

土屋 拓也

NISHIO Hiroki

TSUCHIYA Takuya

English

Haby, Vincent A.

Leonard, Allen T.

Texas A&amp;M Repository

    PUBLICATIONS 2004 ALFALFA YIELDS FROM FIELD PRODUCTION ON RANCHES PARTICIPATING INTHE SUSTAINABLE AGRICULTURE RESEARCH AND EDUCATION PROGRAMVincent Haby and Allen LeonardBackground. Studies were initiated in the late 1980s to determine the factors thatrestricted alfalfa production on the Coastal Plain soils in the Piney Woods of East Texas. Thesesoils, primarily in the Ultisol and Alfisol orders, are naturally acidic and require limestone toelevate soil pH into the range of 6.8 to 7.0 needed for alfalfa production. Boron becomesincreasingly unavailable to clovers and alfalfa in limed acid soils. Even though the surface soilcan be limed to the correct pH for alfalfa, aluminum levels in acid subsoil can be toxic to alfalfaroots. Subsoil acidity may be ameliorated by application of gypsum or limestone, but the desiredeffects of these treatments occur over an extensively long time. Soils in the Ultisol and Alfisolorders are highly leached and many are poorly drained. Poorly drained soils are excessively wetfor alfalfa during extended periods of high rainfall. These factors necessitate that sites becarefully selected for alfalfa production that are well drained and have a pH above 5.5 frombelow the limed surface layer into the four-foot depth. These were the major criteria used toselect sites for alfalfa production on five ranches in Rusk, Gregg, Smith, Cherokee, and AndersonCounties. Each site was limed to raise surface soil pH to 7.0, disked to incorporate the limestoneand eliminate bermudagrass, rolled to pack the soil for a firm seed bed, and sprayed withRoundup for additional control of bermudagrass where needed. Sites were fertilized withphosphorus, potassium, magnesium, sulfur, and boron according to recommendations based onsoil tests. Thirty-one acres of alfalfa were planted in early Dec. 1999 when rainfall providedadequate soil moisture for successful establishment. Each site was sprayed as needed for controlof alfalfa weevil, leaf hopper, broadleaf weeds, and grasses. Yield estimates were clippedimmediately before each harvest, oven-dried, ground, and analyzed for total nitrogen to determinecrude protein. Alfalfa was fertilized in late winter each year with a blend containing phosphorus,potassium, magnesium, sulfur, and boron. Potassium also was applied after the second and forthcuttings with the annual application exceeding 350 lb/ac. Additional sulfur and magnesium wereapplied after the fourth cutting for total application rates of 150 and 75 pounds per acre,respectively.Research Findings. Yield estimates from field-scale alfalfa production three and fouryears after planting are presented in Tables I and 2. Production remained favorable three andfour seasons after planting the alfalfa.41Application. A yield of 4.5 and 5 or more tons/acre in the third and fourth productionseasons demonstrated that alfalfa production is sustainable on selected East Texas soils.Selection of well-drained soils with subsoil pH at 5.5 or higher is critical for alfalfa on CoastalPlain soils.Taylor Ranch (now part ofthe Threlkeld ranches)Amerigraze I 2,454 2,837GrazeKing . 2,464 3,0247-P RanchAmerigraze 3,142 3,348GrazeKing 4,226 3,024Riley Ranch:Amerigraze 1,611 1,707GrazeKin 1,597 2,233Harvest 1 Harvest 2 Harvest 3 Harvest 4 Total1,924 Deer 6,8221,705 grazed 6,8471,711 795 7,7971,655 887 8,0292,751 1,447 10,6872,252 660 10,1623,3173,8302,566 2,3323,073 2,070ield on roducers' ranches the 3rd ear (2002) ofthe SARE funded ro·ect.--------------------------Pounds of 12% moisture hay/acre----------------------------Variety bylocationGrimnRanchAmerigrazetGrazeKingTable 1. Alfalfa haAmerigraze 702: Extended grazing resulted in lower number of yield estimatesroducers' ranches the 4thHarvest 2 Harvest 3ro·ect.Total---------------------------Pounds of 12% moisture hay/acre----------------------------Variety bylocationGrimn RanchAmerigrazetGrazeKing22531967219617541708147317521387Deergrazed79096580Taylor Ranch (now part ofthe Threlkeld Ranches)Amerigraze I 2377 2987 CattleGrazeKing 3135 3672 grazed9371290630180967-P RanchAmerigraze 3640 2567 2266GrazeKing 3444 2659 1699Riley Ranch:Amerigraze 2064 1268 1663GrazeKin 2042 788 152293382114821589133612519405862378127193Amerigraze 702: Extended grazing resulted in lower number of yield estimates42------------------------------------------ -------

Alfalfa yields from field production on ranches participating in the sustainable agriculture research and education program

Texas A&M University

西尾, 洸毅

9466

ニシオ, ヒロキ

NISHIO, Hiroki

土屋, 拓也

9465

ツチヤ, タクヤ

1000050632139

TSUCHIYA, Takuya

Hachinohe Institute of Technology Repository / 八戸工業大学学術リポジトリ

Study of Regional differences of Private rental housing by Spatial statistical analysis-Factor analysis of Regional differences by Geographically Weighted Regression Model-

https://oaktrust.library.tamu.edu/bitstream/1969.1/189748/1/article81.pdf